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  • Postsynthesis Transformation of Insulating Cs4PbBr6 Nanocrystals into Bright Perovskite CsPbBr3 through Physical and Chemical Extraction of CsBr
    ACS Energy Lett. Pub Date : 2017-09-25
    Francisco Palazon, Carmine Urso, Luca De Trizio, Quinten Akkerman, Sergio Marras, Federico Locardi, Ilaria Nelli, Maurizio Ferretti, Mirko Prato, Liberato Manna
    更新日期:2017-09-26
  • A Novel Type of Aqueous Dispersible Ultrathin-Layered Double Hydroxide Nanosheets for in Vivo Bioimaging and Drug Delivery
    ACS Appl. Mater. Interfaces (IF 7.504) Pub Date : 2017-09-25
    Li Yan, Mengjiao Zhou, Xiujuan Zhang, Longbiao Huang, Wei Chen, Vellaisamy A. L. Roy, Wenjun Zhang, Xianfeng Chen
    更新日期:2017-09-26
  • DNA-Assisted Dispersion of Carbon Nanotubes and Comparison with Other Dispersing Agents
    ACS Appl. Mater. Interfaces (IF 7.504) Pub Date : 2017-09-25
    Debabrata Pramanik, Prabal K. Maiti
    更新日期:2017-09-26
  • A Design of Solid-State Li-S Cell with Evaporated Lithium Anode To Eliminate Shuttle Effects
    ACS Appl. Mater. Interfaces (IF 7.504) Pub Date : 2017-09-25
    Yujie Hao, Sheng Wang, Feng Xu, Yijie Liu, Ningning Feng, Ping He, Haoshen Zhou
    更新日期:2017-09-26
  • Tight-Binding Quantum Chemical Molecular Dynamics Study on the Friction and Wear Processes of Diamond-Like Carbon Coatings: Effect of Tensile Stress
    ACS Appl. Mater. Interfaces (IF 7.504) Pub Date : 2017-09-25
    Yang Wang, Jingxiang Xu, Yusuke Ootani, Shandan Bai, Yuji Higuchi, Nobuki Ozawa, Koshi Adachi, Jean Michel Martin, Momoji Kubo
    更新日期:2017-09-26
  • A Highly Stretchable Nanofiber-Based Electronic Skin with Pressure-, Strain-, and Flexion-Sensitive Properties for Health and Motion Monitoring
    ACS Appl. Mater. Interfaces (IF 7.504) Pub Date : 2017-09-25
    Kun Qi, Jianxin He, Hongbo Wang, Yuman Zhou, Xiaolu You, Nan Nan, Weili Shao, Lidan Wang, Bin Ding, Shizhong Cui
    更新日期:2017-09-26
  • Silver Nanocluster-Embedded Zein Films as Antimicrobial Coating Materials for Food Packaging
    ACS Appl. Mater. Interfaces (IF 7.504) Pub Date : 2017-09-25
    Lei Mei, Zi Teng, Guizhi Zhu, Yijing Liu, Fuwu Zhang, Jinglin Zhang, Ying Li, Yongguang Guan, Yaguang Luo, Xianggui Chen, Qin Wang
    更新日期:2017-09-26
  • Electron Transfer from Bi-Isonicotinic Acid Emerges upon Photodegradation of N3-Sensitized TiO2 Electrodes
    ACS Appl. Mater. Interfaces (IF 7.504) Pub Date : 2017-09-25
    Melike Karakus, Wen Zhang, Hans Joachim Räder, Mischa Bonn, Enrique Cánovas
    更新日期:2017-09-26
  • Polycaprolactone Nanocomposites Reinforced with Cellulose Nanocrystals Surface-Modified via Covalent Grafting or Physisorption: A Comparative Study
    ACS Appl. Mater. Interfaces (IF 7.504) Pub Date : 2017-09-25
    Assya Boujemaoui, Carmen Cobo Sanchez, Joakim Engström, Carl Bruce, Linda Fogelström, Anna Carlmark, Eva Malmström
    更新日期:2017-09-26
  • Crucial Role of the Electron Transport Layer and UV Light on the Open-Circuit Voltage Loss in Inverted Organic Solar Cells
    ACS Appl. Mater. Interfaces (IF 7.504) Pub Date : 2017-09-25
    Aurélien Tournebize, Giorgio Mattana, Thérèse Gorisse, Antoine Bousquet, Guillaume Wantz, Lionel Hirsch, Sylvain Chambon
    更新日期:2017-09-26
  • Solution-Processed Lithium-Doped ZnO Electron Transport Layer for Efficient Triple Cation (Rb, MA, FA) Perovskite Solar Cells
    ACS Appl. Mater. Interfaces (IF 7.504) Pub Date : 2017-09-25
    Md Arafat Mahmud, Naveen Kumar Elumalai, Mushfika Baishakhi Upama, Dian Wang, Arman Mahboubi Soufiani, Matthew Wright, Cheng Xu, Faiazul Haque, Ashraf Uddin
    更新日期:2017-09-26
  • Two-Dimensional Graphene–Gold Interfaces Serve as Robust Templates for Dielectric Capacitors
    ACS Appl. Mater. Interfaces (IF 7.504) Pub Date : 2017-09-25
    Tamiru Teshome, Ayan Datta
    更新日期:2017-09-26
  • Deep Eutectic Solvent Functionalized Graphene Composite as an Extremely High Potency Flame Retardant
    ACS Appl. Mater. Interfaces (IF 7.504) Pub Date : 2017-09-25
    Dattatray A. Pethsangave, Rahul V. Khose, Pravin H. Wadekar, Surajit Some
    更新日期:2017-09-26
  • Optimizing Nonlinear Optical Visibility of Two-Dimensional Materials
    ACS Appl. Mater. Interfaces (IF 7.504) Pub Date : 2017-09-25
    Xianchong Miao, Ningning Xuan, Qi Liu, Weishu Wu, Hanqi Liu, Zhengzong Sun, Minbiao Ji
    更新日期:2017-09-26
  • In Operando Probing of Sodium-Incorporation in NASICON Nanomaterial: Asymmetric Reaction and Electrochemical Phase Diagram
    Chem. Mater. (IF 9.466) Pub Date : 2017-09-25
    Guobin Zhang, Tengfei Xiong, Mengyu Yan, Yanan Xu, Wenhao Ren, Xu Xu, Qiulong Wei, Liqiang Mai
    更新日期:2017-09-26
  • Enhanced Photovoltaic Performance of Ternary Polymer Solar Cells by Incorporation of a Narrow-Bandgap Nonfullerene Acceptor
    Chem. Mater. (IF 9.466) Pub Date : 2017-09-25
    Wenkai Zhong, Jing Cui, Baobing Fan, Lei Ying, Yu Wang, Xue Wang, Guichuan Zhang, Xiao-Fang Jiang, Fei Huang, Yong Cao
    更新日期:2017-09-26
  • Resilient Energy Storage under High-Temperature with In-Situ-Synthesized MnOx@Graphene as Anode
    ACS Appl. Mater. Interfaces (IF 7.504) Pub Date : 2017-09-25
    Xiaodong Tian, Hongli Zhu, Chan Jiang, Mingbao Huang, Yuanfu Deng, Songping Wu
    更新日期:2017-09-26
  • Single Magnetic Impurities in Colloidal Quantum Dots and Magic-Size Clusters
    Chem. Mater. (IF 9.466) Pub Date : 2017-09-25
    Rachel Fainblat, Charles J. Barrows, Daniel R. Gamelin
    更新日期:2017-09-26
  • Self-Cleaning Anticondensing Glass via Supersonic Spraying of Silver Nanowires, Silica, and Polystyrene Nanoparticles
    ACS Appl. Mater. Interfaces (IF 7.504) Pub Date : 2017-09-25
    Jong-Gun Lee, Seongpil An, Tae-Gun Kim, Min-Woo Kim, Hong-Seok Jo, Mark T. Swihart, Alexander L. Yarin, Sam S. Yoon
    更新日期:2017-09-26
  • Methotrexate–Camptothecin Prodrug Nanoassemblies as a Versatile Nanoplatform for Biomodal Imaging-Guided Self-Active Targeted and Synergistic Chemotherapy
    ACS Appl. Mater. Interfaces (IF 7.504) Pub Date : 2017-09-25
    Yang Li, Jinyan Lin, Jinyuan Ma, Liang Song, Huirong Lin, Bowen Tang, Dengyue Chen, Guanghao Su, Shefang Ye, Xuan Zhu, Fanghong Luo, Zhenqing Hou
    更新日期:2017-09-26
  • Unexpected Tribological Synergy in Polymer Blend Coatings: Leveraging Phase Separation to Isolate Domain Size Effects and Reduce Friction
    ACS Appl. Mater. Interfaces (IF 7.504) Pub Date : 2017-09-25
    Jillian A. Emerson, Nikolay T. Garabedian, Axel C. Moore, David L. Burris, Eric M. Furst, Thomas H. Epps
    更新日期:2017-09-26
  • Surface Modification of Poly(dimethylsiloxane) with Polydopamine and Hyaluronic Acid To Enhance Hemocompatibility for Potential Applications in Medical Implants or Devices
    ACS Appl. Mater. Interfaces (IF 7.504) Pub Date : 2017-09-25
    Peng Xue, Qian Li, Yuan Li, Lihong Sun, Lei Zhang, Zhigang Xu, Yuejun Kang
    更新日期:2017-09-26
  • Self-Organization of Ions at the Interface between Graphene and Ionic Liquid DEME-TFSI
    ACS Appl. Mater. Interfaces (IF 7.504) Pub Date : 2017-09-25
    Guangliang Hu, Gaind P. Pandey, Qingfeng Liu, Radhika S. Anaredy, Chunrui Ma, Ming Liu, Jun Li, Scott K. Shaw, Judy Wu
    更新日期:2017-09-26
  • Templated Polymer Replica Nanoparticles to Facilitate Assessment of Material-Dependent Pharmacokinetics and Biodistribution
    ACS Appl. Mater. Interfaces (IF 7.504) Pub Date : 2017-09-25
    Danzi Song, Jiwei Cui, Huanli Sun, Tri-Hung Nguyen, Sheilajen Alcantara, Robert De Rose, Stephen J. Kent, Christopher J. H. Porter, Frank Caruso
    更新日期:2017-09-26
  • Metal-Ion Distribution and Oxygen Vacancies That Determine the Activity of Magnetically Recoverable Catalysts in Methanol Synthesis
    ACS Appl. Mater. Interfaces (IF 7.504) Pub Date : 2017-09-25
    Troy Oracko, Rigel Jaquish, Yaroslav B. Losovyj, David Gene Morgan, Maren Pink, Barry D. Stein, Valentin Yu. Doluda, Olga P. Tkachenko, Zinaida B. Shifrina, Maxim E. Grigoriev, Alexander I. Sidorov, Esther M. Sulman, Lyudmila M. Bronstein
    更新日期:2017-09-26
  • Gold-Decorated Porous Silicon Nanopillars for Targeted Hyperthermal Treatment of Bacterial Infections
    ACS Appl. Mater. Interfaces (IF 7.504) Pub Date : 2017-09-25
    Hashim Alhmoud, Anna Cifuentes-Rius, Bahman Delalat, David G. Lancaster, Nicolas H. Voelcker
    更新日期:2017-09-26
  • Mechanistic Investigation of the Catalyzed Cleavage for the Lignin β-O-4 Linkage: Implications for Vanillin and Vanillic Acid Formation
    ACS Sustainable Chem. Eng. (IF 5.951) Pub Date : 2017-09-25
    Torsten Rinesch, Jakob Mottweiler, Marta Puche, Patricia Concepción, Avelino Corma, Carsten Bolm
    更新日期:2017-09-26
  • Sustainable production of high-purity hydrogen by sorption enhanced steam reforming of glycerol over CeO2-promoted Ca9Al6O18-CaO/NiO bifunctional material
    ACS Sustainable Chem. Eng. (IF 5.951) Pub Date : 2017-09-25
    Marziehossadat Shokrollahi Yancheshmeh, Hamid Radfarnia, Maria C. Iliuta

    The present work investigates the sustainable production of high-purity hydrogen through sorption enhanced steam reforming of glycerol (SESRG) over Ca9Al6O18-CaO/xNiO (x = 15, 20, and 25 wt%) and Ca9Al6O18-CaO/20NiO-yCeO2 (y = 5, 10, and 15 wt%) bifunctional catalyst-sorbent materials. A wet mixing method involving limestone acidification coupled with two-step calcination was employed to prepare the bifunctional materials. Cyclic carbonation/calcination tests revealed that the bifunctional materials promoted with 10 and 15 wt% of CeO2 possessed an excellent CaO conversion (97% in both cases) and a remarkable cyclic stability (up to 15 cycles). This was mainly attributed to the thin shell-connected structure formed by the addition of CeO2 and the oxygen mobility characteristic of CeO2. The use of Ca9Al6O18-CaO/xNiO materials in 5 consecutive SESRG/regeneration cycles revealed that they suffered from fast deactivation owing mainly to CaO sintering and coke deposition. Despite the high H2 purity obtained ( 98%), the pre-breakthrough time and hydrogen yield decreased significantly over 5 cycles. Interestingly, the addition of CeO2 to the most efficient catalyst (Ca9Al6O18-CaO/20NiO) resulted in a significant improvement in material stability during cyclic operation. The performance of CeO2-promoted materials was shown to depend strongly on the CeO2 content which controlled the number of adjacent Ni active sites, the amount of coke deposition, and the degree of CaO sintering. The bifunctional material promoted with 10 wt% of CeO2 showed the best performance over 5 consecutive SESRG/regeneration cycles, with a stable H2 purity of  98%, H2 yield of  91%, and pre-breakthrough time of 48 min. The long-term cyclic stability test of Ca9Al6O18-CaO/20NiO-10CeO2 over 20 cycles exhibited a very stable performance with H2 yield of 91% and H2 purity of 98% within 20 cycles, confirming the high potential of this material for SESRG process.

    更新日期:2017-09-26
  • One-step in situ Synthesis of Polypeptide-gold Nanoparticles Hybrid Nanogels and Their Application in Targeted Photoacoustic Imaging
    ACS Sustainable Chem. Eng. (IF 5.951) Pub Date : 2017-09-25
    Rui-Mei Jin, Ming-Hao Yao, Jie Yang, Dong-Hui Zhao, Yuan-Di Zhao, Bo Liu

    Hybrid nanogels have been widely used as multifunctional drug delivery carriers and imaging probes for biomedical applications. Two triblock artificial polypeptides PC10A and PC10ARGD were biosynthesized to prepare hybrid nanogels. When the concentration of these polypeptides drops to less than 2% (w/w), they can form nanogels by self-assembly. The physical characteristics of nanogels, such as surface potential, size, and targeting domain are able to be tuned. Polypeptide-gold nanoparticles hybrid nanogels were in situ synthesized using PC10A(RGD) as templates and photoinitiator I-2959 under 365 nm UV light irradiation in one step. The results of the effect of gold ion concentration on synthesized gold nanoparticles in hybrid nanogels showed that the size and the concentration of gold nanoparticles in hybrid nanogel increased gradually with the increasing of gold ion concentration. The concentration of polypeptide has no obvious effect on the properties of gold nanoparticles in hybrid nanogels and only influences the size of the hybrid nanogels. The concentration of gold nanoparticles in hybrid nanogels increased with the increasing of irradiation time. In addition, the change of pH (3.0-7.0) did not affect the properties of the gold nanoparticles in the hybrid nanogels. Cytotoxicity results showed that hybrid nanogels were almost nontoxic to HeLa cells when the concentration of Au ion was below 0.72 mM. An arginine-glycine-aspartic acid motif could be introduced into the PC10ARGD-gold nanoparticles hybrid nanogels to enhance efficient receptor-mediated endocytosis in αvβ3 overexpressing HeLa cells as analyzed by photoacoustic imaging. These results indicate that such hybrid nanogels are promising to be used in biomedical applications.

    更新日期:2017-09-26
  • A novel strategy towards AIE-active fluorescent polymeric nanoparticles from polysaccharides: preparation and cell imaging
    ACS Sustainable Chem. Eng. (IF 5.951) Pub Date : 2017-09-25
    Qing Wan, Ruming Jiang, Lili Guo, Shengxian Yu, Meiying Liu, Jianwen Tian, Guoqiang Liu, Fengjie Deng, Xiaoyong Zhang, Yen Wei

    Fluorescent polymeric nanoparticles (FPNs) as novel theranostic agents for cancer diagnose and treatment have been widely investigated in recent years. However, most of FPNs were constructed with typical inorganic quantum dots, fluorescent proteins and conventional organic dyes, which have been still suffered from many obstacles such as serious cytotoxicity, easy enzymolysis and vicious aggregation-caused fluorescence quenching (ACQ). Herein, to overcome these problems, we design and synthesize novel FPNs with a unique aggregation-induced emission (AIE) feature using resourceful and cost-effective oxidized sodium alginate (OSA) as natural polymer protected shells of FPNs. Moreover, differing from commercial or synthetic polymers such as PEG, BSA and lecithin, sodium alginate from marine seaweeds is cheaper, abundant source and excellent biocompatibility. Thus-prepared AIE-active OSA-Phe-OSA FPNs by the facile Schiff base condensation have many advantages, such as strong fluorescence, great water dispersity, excellent photostability and desirable biocompatibility and stained performance. These features endow them great potential for various biomedical applications.

    更新日期:2017-09-26
  • Enhanced nitrogen photofixation over LaFeO3 via acid treatment
    ACS Sustainable Chem. Eng. (IF 5.951) Pub Date : 2017-09-25
    Xiang Sun, Dong Jiang, Ling Zhang, Wenzhong Wang

    The N2 photofixation presents a green and eco-friendly ammonia synthesis approach. Present strategies for light-induced N2 activation suffers from low efficiency and instability, largely hindering the development of this technology. Herein, we report the LaFeO3 co-optimization of N2 activation as well as subsequent photo-induced protonation with the further phosphate acid treatment. Efficient ammonia evolution rate reached 250 μmol∙g-1∙h-1 over LaFeO3 under simulated sunlight. The enhancement of phosphate modified samples was mainly attributed to the “pull and push” effect. The hydrogen bonding centers and transition metals Fe were served as two separation active sites, which improves the adsorption and activation of dinitrogen. Besides, the facilitation of H2O dissociation was also achieved after phosphate modification. These results suggested an alternative N2 photofixation strategy of traditional organic and precious metallic additives for efficient ammonia synthesis.

    更新日期:2017-09-26
  • Direct synthesis of 2,5-diformylfuran from carbohydrates using high-silica MOR zeolites supported isolated vanadium species
    ACS Sustainable Chem. Eng. (IF 5.951) Pub Date : 2017-09-25
    Wei Zhang, Tongsuo Meng, Junjie Tang, Wenxia Zhuang, Yu Zhou, Jun Wang

    Directly transforming carbohydrates into high value-added chemicals provides an economic and sustainable path for the utilization of the renewable biomass resource. Herein, we fabricated an efficient catalytic system for the straightforward conversion of various carbohydrates into 2,5-diformylfuran (DFF) by using vanadium oxide supported on high-silica mordenite (MOR) zeolites in the presence of hydrochloric acid. The synthesis of high-silica MOR zeolites was achieved in a template-free dense system featuring energy saving and environmental friendly, delivering the SiO2/Al2O3 ratio up to 80. The conversion of fructose into DFF reached a high yield of 96.0% in a one-pot and one-step reaction by oxidation with atmospheric O2 (balloon), with the facile recovery and well reusability of the catalyst. Well yields were also obtained in the direct synthesis of DFF from other carbohydrates including glucose, sucrose, inulin, raffinose, maltose and starch. The high performance relied on the unique high-silica MOR skeleton, which 1) endowed the highly dispersed V species mainly in the form of isolated tetrahedrally coordinated [V2O8]6- species as the active oxidative sites; 2) provided the satisfactory acidity for the formation of the intermediate 5-hydroxymethylfurfural (HMF) and sufficient resistance to the corrosion under the acid environment for good stability.

    更新日期:2017-09-26
  • A High-performance Oxygen Evolution Anode from Stainless Steel via Controlled Surface Oxidation and Cr Removal
    ACS Sustainable Chem. Eng. (IF 5.951) Pub Date : 2017-09-25
    Sengeni Anantharaj, Murugadoss Venkatesh, Ashish S Salunke, Tangella V.S.V. Simha, Vijayakumar Prabu, Subrata Kundu

    Improving the water oxidation performance of abundantly available materials such as stainless steel (SS) with notable intrinsic electrocatalytic oxygen evolution reaction (OER) activity due to the presence of Ni and Fe is highly anticipated in water splitting. A new method for promoting the corrosion of stainless steel (304) was found which assisted the uniform formation of oxygen evolution reaction (OER) enhancing NiO incorporated Fe2O3 nanocrystals with the simultaneous reduction in the surface distribution of OER inactive Cr. An equimolar combination of KOH and hypochlorite was used as the corroding agent at 180 °C. The effect of corrosion time on the OER activity was studied and found that better water oxidation performance was observed when the corrosion time was 12 h (SS-12). The SS-12 showed an abnormal enhancement in OER activity compared to the untreated SS and other optimized versions of the same by requiring very low overpotentials of 260, 302 and 340 mV at the current densities of 10, 100 and 500 mA cm-2 along with a very low Tafel slope in the range of 35.6 to 43.5 mV dec-1. These numbers have certainly shown the high-performance electrocatalytic water oxidizing ability of SS-12. The comparative study revealed that the state-of-the-art IrO2 had failed to compete with our performance improved catalytic water oxidation anode ‘the SS-12’. This fruitful finding indicates that the SS-12 has the potential to be an alternate anode material to precious IrO2/RuO2 for alkaline water electrolysers in future.

    更新日期:2017-09-26
  • Highly recyclable fluoride for enhanced cascade hydrosilylation-cyclization of levulinates to γ-valerolactone at low temperatures
    ACS Sustainable Chem. Eng. (IF 5.951) Pub Date : 2017-09-25
    Wenfeng Zhao, Tingting Yang, Hu Li, Weibo Wu, Zhongwei Wang, Chengjiang Fang, Shunmugavel Saravanamurugan, Song Yang

    A facile and benign catalytic route has been developed to quantitatively yield γ-valerolactone (GVL; ca. 97%) from biomass-based levulinates at room temperature to 80 ºC by using easily available polymethylhydrosiloxane (PMHS) and KF as liquid H-donor and recyclable catalyst, respectively. No extra step was required to liberate GVL from the in situ formed siloxane, and this catalytic system exhibited a lower activation energy (40.9 kJ/mol) compared to previously reported ones. The deuterium-labelled study futher demonstrated the reaction proceeding through cascade hydrosilylation and cyclization with fluoride successively acting as nucleophile and base. In addition, the PMHS-derived resin was extremely favorable to restrain the leaching of fluoride and maintain its constant activity for at least six cycles.

    更新日期:2017-09-26
  • Recycling and Delivery of Homogeneous Fluorous Rhodium Catalysts Using Poly(tetrafluoroethylene) (PTFE); "Catalyst-on-a-Tape"
    ACS Sustainable Chem. Eng. (IF 5.951) Pub Date : 2017-09-25
    Long V. Dinh, Markus Jurisch, Tobias Fiedler, John A. Gladysz

    The red-orange fluorous rhodium(I) complexes ClRh(P((CH2)mRfn)3)3 (m/n = 2/6 (1a), 2/8, 3/6, 3/10; Rfn = (CF2)n-1CF3) are essentially insoluble in organic solvents at 20 °C, but have measurable solubilities in dibutyl ether at 55-65 °C. Under these conditions, they are effective catalyst precursors for the hydrosilylation of cyclohexanone by PhMe2SiH. Upon cooling, the catalyst rest states precipitate, giving colorless solutions of C6H11OSiPhMe2. When this sequence is conducted in the presence of PTFE (Teflon®) tape, the catalysts precipitate onto the tape, but desorb when used in subsequent cycles. The catalyst precursors can also be pre-coated onto the tape, allowing quantities to be delivered by length instead of mass. Rate measurements (1a) show an induction period in the first cycle, excellent retention of activity in the second and third cycles, and significant activity loss in the fourth. Rhodium leaching is 0.57% and 5.3% for the first two cycles (AAS-ICP); (CF2)5CF3 leaching is 11.4% over the first three cycles (19F NMR). Reactions with added mercury show that metallic rhodium is not responsible for catalysis. Identical protocols are applied to 2-octanone, acetophenone, and benzophenone, albeit with some activity loss in the third cycle. Other forms of PTFE can be similarly employed (e.g., Gore-Tex® membrane). However, fluorous/organic liquid/liquid biphase conditions can give better retention of catalyst activity. Nonetheless, the diverse morphologies of PTFE that are commercially available suggest avenues for further optimization.

    更新日期:2017-09-26
  • Nanostructured gold/bismutite hybrid heterocatalysts for plasmon-enhanced photosynthesis of ammonia
    ACS Sustainable Chem. Eng. (IF 5.951) Pub Date : 2017-09-25
    Changlong Xiao, Hong Hu, Xinyi Zhang, Douglas R. Macfarlane

    Nitrogen (N2) reduction to produce ammonia (NH3) is one of the most important chemical processes globally. Nowadays, Haber–Bosch process is the main industrial procedure for the artificial N2 fixation, which requires extreme harsh synthetic conditions and large energy consumption resulting in massive emission of green-house gas. Hence, an alternative photo-synthesis of NH3 under mild condition, which is sustainable and less energy consuming, would be highly desirable. In this study, Au nanoparticles modified (BiO)2CO3 nanodisks were fabricated through a facile hydrothermal method followed by chemical bath deposition and investigated for the photocatalytic reduction of N2 in pure water system at atmospheric pressure and room temperature. The inducing of Au nanoparticles can dramatically enhance the light trapping as well as charge separation in the Au/(BiO)2CO3 hybrid, thereby promoting overall energy conversion efficiency. The synergetic effect over nanostructured gold/bismutite hybrid results in high catalytic activity and exhibits high performance for artificial photosynthesis of ammonia.

    更新日期:2017-09-26
  • Supramolecular Polymer Nanocomposites Derived from Plant Oils and Cellulose Nanocrystals
    Macromolecules (IF 5.835) Pub Date : 2017-09-25
    Lingzhi Song, Zhongkai Wang, Meghan E. Lamm, Liang Yuan, Chuanbing Tang
    更新日期:2017-09-26
  • Highly Localized Strain in a MoS2/Au Heterostructure Revealed by Tip-Enhanced Raman Spectroscopy
    Nano Lett. (IF 12.712) Pub Date : 2017-09-25
    Mahfujur Rahaman, Raul D. Rodriguez, Gerd Plechinger, Stefan Moras, Christian Schüller, Tobias Korn, Dietrich R. T. Zahn
    更新日期:2017-09-26
  • Core–Shell Au@Metal-Oxide Nanoparticle Electrocatalysts for Enhanced Oxygen Evolution
    Nano Lett. (IF 12.712) Pub Date : 2017-09-25
    Alaina L. Strickler, Marı́a Escudero-Escribano, Thomas F. Jaramillo
    更新日期:2017-09-26
  • Mapping Photoemission and Hot-Electron Emission from Plasmonic Nanoantennas
    Nano Lett. (IF 12.712) Pub Date : 2017-09-25
    Richard G. Hobbs, William P. Putnam, Arya Fallahi, Yujia Yang, Franz X. Kärtner, Karl K. Berggren
    更新日期:2017-09-26
  • Polypyrrole-Coated Perfluorocarbon Nanoemulsions as a Sono-Photoacoustic Contrast Agent
    Nano Lett. (IF 12.712) Pub Date : 2017-09-25
    David S. Li, Soon Joon Yoon, Ivan Pelivanov, Martin Frenz, Matthew O’Donnell, Lilo D. Pozzo
    更新日期:2017-09-26
  • Contact Dependence and Velocity Crossover in Friction between Microscopic Solid/Solid Contacts
    Nano Lett. (IF 12.712) Pub Date : 2017-09-25
    Joshua D. McGraw, Antoine Niguès, Alexis Chennevière, Alessandro Siria
    更新日期:2017-09-26
  • Anisotropic Cracking of Nanocrystal Superlattices
    Nano Lett. (IF 12.712) Pub Date : 2017-09-25
    Benjamin T. Diroll, Xuedan Ma, Yaoting Wu, Christopher B. Murray
    更新日期:2017-09-26
  • Production of highly upgraded bio-oils through two-step catalytic pyrolysis of water hyacinth
    Energy Fuels (IF 3.091) Pub Date : 2017-09-25
    Zahid Hussain, Nadia Bashir, Mohammad Ibrar Khan, Khadim Hussain, Shaharin Anwar Sulaiman, Muhammad Yasin Naz, Khalid A. Ibrahim, Nasser M. AbdEl-Salam

    In this study, water hyacinth was converted into highly flammable bio-oil through a two-step catalytic pyrolysis approach. A three-prong approach, based on biochemical pre-treatment of the biomass, use of clinkered catalyst and an additional pyrolysis step, was adopted to produce highly upgraded bio-oils. Fresh, putrefied and microbe treated water hyacinth was pyrolyzed into oil, gas and solid residue. The oil product of 1st step pyrolysis contained 9.42%, 36.72% and 30.38% of combustible liquids by mass, respectively. The fractional distillation of the oil product of fresh, putrefied, and microbe treated samples resulted in 11.56%, 7.1% and 31.67 % of residue by mass, respectively. These residues were re-pyrolyzed and the oil and gas products of 1st and 2nd step of the pyrolysis, were further analyzed for their chemical composition. After two-stage pyrolysis, the amount of the highly upgraded oil was increased to 34.34%, 58.31% and 43.21% by mass, respectively. The bio-oils, obtained from fresh, putrefied and microbe treated samples, were significantly differing in terms of their chemical nature and the number of compounds.

    更新日期:2017-09-26
  • Investigation on Combustion and Emission Performance of a Common Rail Diesel Engine Fueled with Diesel/Biodiesel/PODE Blends
    Energy Fuels (IF 3.091) Pub Date : 2017-09-25
    Hao Chen, Jingjing He, Haining Hua

    PODE (polyoxymethylene dimethyl ethers) is an excellent blend for diesel due to its high cetane number, high oxygen content and low viscosity. Combustion and emission characteristics are investigated based on experimental tests on a turbocharged, in-line 6-cylinder, common rail diesel engine. Results show that starts of combustion advance with PODE blending at low and partial loads. Pilot plus main injection can increase the peak combustion pressure and peak heat release rates of Diesel/Biodiesel/PODE blend fuels due to large amounts of reactive radicals formed in the pilot heat release stage. With loads increase, slight descends for both peak combustion pressure and peak heat release rate are observed. At low loads, CA10s, CA50s and CA90s of Diesel/Biodiesel/PODE blend fuels advance and both rapid combustion and late combustion phases shorten. At medium loads and high loads, CA10s advance, CA50s maintain unchangeable and CA90s advance apparently. Rapid combustion phases increase very little, while the late combustion phases lower obviously. Combustion durations shorten in each engine operation. It can be concluded that PODE addition is helpful for more concentrated heat release. As a result, combustion temperatures increase. NOX emissions of blend fuels arise with PODE at 1400 and 2000 r/min, while soot emissions decrease obviously. In particular, Diesel/Biodiesel/PODE blends reduce soot significantly at medium and high loads and ultrafine particles at low and partial loads.

    更新日期:2017-09-26
  • High yield of Hydrocarbons from Catalytic Hydrodenitrogenation of Indole Under Hydrothermal Conditions
    Energy Fuels (IF 3.091) Pub Date : 2017-09-25
    Ligang Luo, Shaotong Liu, Chunze Liu, Yuanyuan Wang, Liyi Dai

    We report herein on a new method to achieve a high yield of hydrocarbons from hydrothermal catalytic hydrodenitrogenation of indole, which is higher than that from conventional pyrolysis methods. The main hydrocarbon products were aromatic hydrocarbons and alkanes, which is similar with fossil oils to be used as liquid fuels in the future. Catalyst screening experiments show that noble metal catalysts (e.g., 5 wt% Pt, Pd, or Ru) supported on porous solids (e.g., carbon, Al2O3) enhanced the conversion of indole to hydrocarbons under hydrothermal condition. Of those different catalysts, Pd/γ-Al2O3 shows the greatest influence on the yield of hydrocarbons, which we focus on the catalyst Pd/γ-Al2O3 in more details. Based on the Pd/γ-Al2O3 catalyst, the effects of time, temperature, and H2 pressure on the hydrocarbons were discussed. HDN of indole reaction at 450 °C, 0.015 g/cm3 water density, 5 MPa H2 and 50 wt% Pd/γ-Al2O3 loading led to a maximum yield (51 mol%) of hydrocarbons at 120 min. It proposes the mechanism to acquire hydrocarbons from hydrogenational indole denitrogation, which experiences two different pathways, as (1) indole is directly hydrodenigrated into hydrocarbons, and (2) intermediate oxygenated products from hydrolysis of partly hydrodenigrated indole, were hydrodeoxygenated to removal O to acquire hydrocarbons. The factors for deactivation of catalyst under hydrothermal condition are also discussed by the results from charactering the surface, bulk structure and microscopy experiments.

    更新日期:2017-09-26
  • Oxyfuel Combustion in a 600 MW Gaseous-Fuel Tangentially-Fired Boiler
    Energy Fuels (IF 3.091) Pub Date : 2017-09-25
    Rached Ben-Mansour, Mohamed A. M. Habib, Naef A. A. Qasem, Ahmed Abuelyamen

    Tangentially-fired furnaces are vortex-combustion burners preferably used for oxy-fuel combustion in order to minimize the CO2 emission and controlling the boiler temperature. The objective of the present study is to investigate numerically the combustion and emission characteristics of oxy-fuel combustion of turbulent reacting flows in a 3D model furnace of a 600 MW tangentially fired boiler. Numerical calculations of the flow field and thermal fields as well as the species concentrations for the oxy-fuel combustion in the furnace of a gaseous-fuel tangentially-fired boiler were conducted. Three cases of oxy-fuel combustion were investigated. These are 73%, 79% and 65% of volumetric inlet CO2 while the remaining inlet volume was O2. The results of these three oxy-fuel cases are compared to the air-fired combustion. In the present model, the radiation heat transfer was solved by weighted sum gray gases (WSGG) approach, whereas the chemical reaction model was facilitated by simple lumped reaction model. The results show that the oxy-fuel case of 79% CO2 can preferably minimize the combustion temperature for highly sustainable materials. However, the 65% CO2 oxy-fuel case generates high-temperature values for improving the heat characteristics. The 73% CO2 oxy-fuel and the air-fired cases are fairly close in the thermal behavior to each other.

    更新日期:2017-09-26
  • Coal-on-a-Chip: Visualizing Flow in Coal Fractures
    Energy Fuels (IF 3.091) Pub Date : 2017-09-25
    Alireza Gerami, Ryan T. Armstrong, Benjamin Johnston, Majid Ebrahimi Warkiani, Nader Mosavat, Peyman Mostaghimi

    Geomaterial microfluidics are the next generation of tools necessary for studying fluid flows related to subsurface engineering technologies. Traditional microfluidic devices do not capture surface wettability and roughness parameters that can have a significant influence on porous media flows. This is particularly important for coal seam gas reservoirs in which methane gas is transported through a well-developed system of natural fractures that display unique wettability and roughness characteristics. A coal geomaterial microfluidic device can be generated by etching a fracture pattern on a coal surface by using three-dimensional laser micromachining; however, it is unclear if the resulting surface properties are representative of real coal. In an effort to generate a realistic coal microfluidic device, we characterize coal surface roughness properties from real coal cleats. We then compare these results to the roughness of the patterns, generated from laser etching. Roughness measurements in real coal fractures show that cleats and microfractures are mostly oriented parallel to the coal beddings rather than perpendicular to the bedding, which is important when selecting coal for fabrication of a microfluidic device since we find that the natural microfractures influence the resulting roughness of etched fractures. We also compare resulting coal/brine/gas contact angles under static and dynamics conditions. The contact angle for coal is highly heterogeneous. Surface roughness and pore pressure may influence the contact angle. With the aid of the coal geomaterial device, the effect of these parameters on coal wettability can be explored and a range of possible coal contact angles can be visualized and represented. The geomaterial fabrication, as outlined herein, provides a tool to capture more realistic coal surface properties in microfluidics experiments.

    更新日期:2017-09-26
  • Organic Matter Characterization of Shale Rock by X-ray Photoelectron Spectroscopy: Adventitious Carbon Contamination and Radiation Damage
    Energy Fuels (IF 3.091) Pub Date : 2017-09-25
    Antonela Cánneva, Iván S. Giordana, Georgina Erra, Alejandra Calvo
    更新日期:2017-09-26
  • Autocatalytic Depolymerization of Alkali Lignin by Organic Bound Sodium in Supercritical Ethanol
    Energy Fuels (IF 3.091) Pub Date : 2017-09-25
    Daliang Guo, Bei Liu, Yanjun Tang, Junhua Zhang, Xinxing Xia

    To study the catalytic depolymerization process of alkali lignin by organic bound sodium in supercritical ethanol, the solid chars and liquid oils products were first prepared by using a high pressure autoclave at different temperatures and times. The properties of solid chars then were analyzed by elemental analysis, FT-IR, and SEM, and the composition of liquid oils was characterized by GC–MS. FT-IR and SEM results showed that the depolymerization process of alkali lignin catalyzed by organic bound sodium in sub- and supercritical ethanol formed different micrometer-sized spheres products, and the sphere size of the char products was obviously affected by the depolymerized temperature. The C/O and C/H ratios of the chars products also increased with depolymerized temperature increasing. GC–MS results indicated that the components of liquid oils obtained from sub- and supercritical ethanol mainly were ester and phenolic compounds, respectively.

    更新日期:2017-09-26
  • Adsorption Species Distribution and Multicomponent Adsorption Mechanism of SO2, NO, and CO2 on Commercial Adsorbents
    Energy Fuels (IF 3.091) Pub Date : 2017-09-25
    Lei Luo, Yangyang Guo, Tingyu Zhu, Yang Zheng

    Adsorption is a commonly used method for gas pollutant removal. The adsorption performances of four commercial adsorbents have been compared in this work through a fixed-bed reactor. The single gas adsorption results show that zeolite is more effective for SO2, NO, and CO2 removal among the four adsorbents. SO2, NO, and CO2 are mainly monolayer adsorbed on adsorbents. Physically adsorbed SO2 is the main adsorption species on 13X zeolite, 5A zeolite, and mesoporous alumina according to TPD-MS, while SO2 is more easily oxidized on activated carbon than the other adsorbents. NO can be oxidized more easily on zeolite than activated carbon. Only physically adsorbed CO2 is detected on these adsorbents. Multicomponent adsorption is investigated on 13X zeolite and activated carbon. For gas adsorption on 13X zeolite, the inhibitive effect of NO on SO2 is 26.3% higher than that of CO2 on SO2, indicating that NO plays a dominant role in SO2 adsorption. Physically adsorbed NO is the only NO adsorption species on 13X when SO2 exists, showing NO oxidation on 13X is greatly inhibited by SO2. For gas adsorption on activated carbon, chemically adsorbed SO2 increases largely after NO is put in, showing that the promotive effect of NO on SO2 is mainly for the chemically adsorbed SO2. In the presence of SO2, chemically adsorbed NO almost disappeared, which indicates that SO2 mainly dominates chemically adsorbed NO on activated carbon. The effects of adsorbent performance on multicomponent gas adsorption are reflected by the gas adsorption mechanism. These findings provide considerable specific information for industrial flue gas purification.

    更新日期:2017-09-26
  • Self-Assembly of Mesoscale Artificial Clathrin Mimics
    ACS Nano (IF 13.942) Pub Date : 2017-09-25
    Yifan Kong, Mina-Elraheb S. Hanna, Denys Zhuo, Katherine G. Chang, Tara Bozorg-Grayeli, Nicholas A. Melosh
    更新日期:2017-09-26
  • Adsorption Behavior of Asphaltenes and Resins on Kaolinite
    Energy Fuels (IF 3.091) Pub Date : 2017-09-25
    Aristeidis Tsiamis, Spencer E. Taylor
    更新日期:2017-09-26
  • Biomass Gasification in an Innovative Spouted-Bed Solar Reactor: Experimental Proof of Concept and Parametric Study
    Energy Fuels (IF 3.091) Pub Date : 2017-09-25
    Quentin Bellouard, Stéphane Abanades, Sylvain Rodat

    Solar thermochemical gasification of lignocellulosic biomass promises a new path for the production of alternative fuels as well as storage and transport of solar energy as a convertible and transportable fuel. The use of concentrated solar energy as the external heat source for the high-temperature reaction allows the production of high-value syngas with both higher energy conversion efficiency and reduced cost of gas cleaning and separation, while saving biomass feedstock. A newly designed solar reactor based on the principle of a spouted bed reactor was used for continuous solar-driven gasification of biomass particles. The reliable operation of this 1.5 kW reactor was experimentally demonstrated under real solar irradiation using a parabolic dish solar concentrator. Several types of biomass particles were continuously fed into the reactor at temperatures ranging from 1100 to 1400 °C. The injected particles consisted of beech wood or a mix of resinous wood with size ranging from 0.3 to 2 mm. The aim of this study was to achieve a proof of concept for the novel solar reactor applied to biomass gasification. A parametric study of the gasification conditions was realized to optimize the syngas production. The influence of temperature, oxidizing agent nature (H2O or CO2) and flow rate, heating configuration (direct or indirect irradiation), biomass type, particles size, and feeding rate on gas yield and composition was investigated. The syngas yield increased drastically with the temperature for both steam and CO2 gasification, while increasing the steam content favored H2 and reduced CO production. Maximum amounts of produced syngas over 70 mmol/gbiomass and carbon conversion rates over 90% were achieved. The biomass energy content was solar-upgraded by a factor of 1.10 at 1400 °C.

    更新日期:2017-09-26
  • Compartmentalized Assembly of Motor Protein Reconstituted on Protocell Membrane toward Highly Efficient Photophosphorylation
    ACS Nano (IF 13.942) Pub Date : 2017-09-25
    Youqian Xu, Jinbo Fei, Guangle Li, Tingting Yuan, Junbai Li
    更新日期:2017-09-26
  • Lab-on-Skin: A Review of Flexible and Stretchable Electronics for Wearable Health Monitoring
    ACS Nano (IF 13.942) Pub Date : 2017-09-25
    Yuhao Liu, Matt Pharr, Giovanni Antonio Salvatore
    更新日期:2017-09-26
  • Superior Plasmonic Photodetectors Based on Au@MoS2 Core–Shell Heterostructures
    ACS Nano (IF 13.942) Pub Date : 2017-09-25
    Yuan Li, Jennifer G. DiStefano, Akshay A. Murthy, Jeffrey D. Cain, Eve D. Hanson, Qianqian Li, Fernando C. Castro, Xinqi Chen, Vinayak P. Dravid
    更新日期:2017-09-26
  • Highly Efficient Rubrene–Graphene Charge-Transfer Interfaces as Phototransistors in the Visible Regime
    Adv. Mater. (IF 19.791) Pub Date : 2017-09-25
    Gareth F. Jones, Rui M. Pinto, Adolfo De Sanctis, V. Karthik Nagareddy, C. David Wright, Helena Alves, Monica F. Craciun, Saverio Russo
    更新日期:2017-09-26
  • Effects of Self-Assembled Monolayer Modification of Nickel Oxide Nanoparticles Layer on the Performance and Application of Inverted Perovskite Solar Cells
    ChemSusChem (IF 7.226) Pub Date : 2017-09-25
    Qin Wang, Chu-Chen Chueh, Ting Zhao, Jiaqi Cheng, Morteza Eslamian, Wallace C. H. Choy, Alex K.-Y. Jen
    更新日期:2017-09-26
  • Spectral Analysis of the Uranyl Squarate and Croconate System: Evaluating Differences between the Solution and Solid-State Phases
    Cryst. Growth Des. (IF 4.055) Pub Date : 2017-09-25
    M. Basile, D. K. Unruh, L. Streicher, T. Z. Forbes
    更新日期:2017-09-26
Some contents have been Reproduced with permission of the American Chemical Society.
Some contents have been Reproduced by permission of The Royal Society of Chemistry.
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