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Valuation of banana peel waste for producing activated carbon via NaOH and pyrolysis for methylene blue removal Carbon Lett. (IF 1.992) Pub Date : 2021-01-26 Lana S. Maia, Letícia D. Duizit, Fernanda R. Pinhatio, Daniella R. Mulinari
The discharge of dye-containing industrial effluents such as methylene blue (MB) in water bodies has resulted in severe aquatic and human life problems. In addition to this factor, there is the accumulation of banana peel wastes, which can generate ecological damage. Thus, this research purpose a different method from the literature using the banana peel waste (BP) to produce activated carbon (ACBP)
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Synthesis and characterization of microporous activated carbon from rubberwood by chemical activation with KOH Carbon Lett. (IF 1.992) Pub Date : 2021-01-22 Wasutha Thongpat, Juntakan Taweekun, Kittinan Maliwan
This research aims to study the effect of impregnation ratio and activation temperature on microporous development of activated carbon (AC). Rubberwood chips, which are wasted from home furnishing industry, were used as precursors for synthesized of activated carbon by chemical activation employing Potassium hydroxide (KOH) as activation agent. Rubberwood char was carbonized at 400 °C for 1 h under
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Coulomb mechanism of Raman radiation in graphene Carbon Lett. (IF 1.992) Pub Date : 2021-01-19 S. V. Melkonyan
The phenomena of single-layer graphene resonant photoluminescence and Raman radiation are discussed taking into account the photo-generated electron–hole Coulomb interaction. On the base of general principles of a many-particle interactions and the interband resonance optical transitions a photon radiation new mechanism (Coulomb mechanism) is proposed. Through Stokes 2D'-mode particular case analysis
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Comparison of ultrasonic-treated rice husk carbon with the conventional carbon black towards improved mechanical properties of their EPDM composites Carbon Lett. (IF 1.992) Pub Date : 2021-01-19 In Tae Kim, Kwang Ho Lee, Tridib Kumar Sinha, Jeong Seok Oh
Because of depletion of fossil fuel from the earth curst and increase of environmental concerns, in search of an efficient alternative to the traditional carbon black (CB), a biochar known as rice husk carbon (RHC) has been examined here as a filler material to develop the EPDM composite. In this regard, the ball milled RHC was further treated with ultrasonic wave and used with or without its surface
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The use of semi-coke for phenol removal from aqueous solutions Carbon Lett. (IF 1.992) Pub Date : 2021-01-19 Tamara A. Krasnova, Natalia V. Gora, Oxana V. Belyaeva, Alena K. Gorelkina, Nadezhda S. Golubeva, Irina V. Timoshchuk
The paper deals with a comparative study of equilibrium and kinetics of phenol adsorption from aqueous solutions by means of commercial activated carbons and semi-cokes, differing in the nature of feedstock, production technology and structural characteristics. The main adsorption parameters are calculated with the usage of Langmuir and Dubinin–Radushkevich equations. The change in the characteristics
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First-principles calculation of volatile organic compound adsorption on carbon nanotubes: Furan as case of study Carbon Lett. (IF 1.992) Pub Date : 2021-01-14 Ana M. Torres, J. D. Correa
Sensing of volatile organic compounds (VOCs) is a growing research topic because of the concern about their hazard for the environment and health. Furan is a VOC produced during food processing, and it has been classified as a risk molecule for human health and a possible biomarker of prostate cancer. The use of carbon nanotubes for VOCs sensing systems design could be a good alternative. In this work
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Capacitive behavior of functionalized activated carbon-based all-solid-state supercapacitor Carbon Lett. (IF 1.992) Pub Date : 2021-01-12 Kyu Seok Lee, Ye Ji Seo, Hyeon Taek Jeong
In this report, we incorporate activated carbon (AC) onto aluminum substrate via doctor blade method to produce an all-solid-state supercapacitor. The electrochemical properties of the all-solid-state supercapacitor were characterized by cyclic voltammetry and electrochemical impedance spectroscopy. Galvanostatic charge/discharge tests also were carried out to exhibit stability of the AC-based supercapacitor
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Review of oil palm-derived activated carbon for CO 2 capture Carbon Lett. (IF 1.992) Pub Date : 2021-01-09 Jia Yen Lai, Lock Hei Ngu, Siti Salwa Hashim, Jiuan Jing Chew, Jaka Sunarso
Increasing ambient carbon dioxide (CO2) concentration from anthropogenic greenhouse gas emission has contributed to the growing rate of global land and ocean surface temperature. Various carbon capture and storage (CCS) technologies were established to mitigate this impending issue. CO2 adsorption is gaining prominence since unlike traditional chemical absorption, it does not require high energy usage
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A criterion combined of bulk and surface lithium storage to predict the capacity of porous carbon lithium-ion battery anodes: lithium-ion battery anode capacity prediction Carbon Lett. (IF 1.992) Pub Date : 2021-01-07 Majid Shaker, Ali Asghar Sadeghi Ghazvini, Faisal Raza Qureshi, Reza Riahifar
The high level of lithium storage in synthetic porous carbons has necessitated the development of accurate models for estimating the specific capacity of carbon-based lithium-ion battery (LIB) anodes. To date, various models have been developed to estimate the storage capacity of lithium in carbonaceous materials. However, these models are complex and do not take into account the effect of porosity
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Size dependent conduction characteristics of catalyst-multi-walled carbon nanotube junction Carbon Lett. (IF 1.992) Pub Date : 2021-01-04 Chris J. Barnett, Alvin Orbaek White, Andrew R. Barron
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Exploration on reduced graphene oxide/strontium pyro niobate electrode material for electrochemical energy storage applications Carbon Lett. (IF 1.992) Pub Date : 2021-01-04 M. Infant Shyam Kumar, S. Shahil Kirupavathy, S. Shalini
Most recently, graphene-related composite-modified electrode surfaces are been widely employed to improve surface interactions and electron transfer kinetics. Hydrothermally prepared strontium pyro niobate (SPN) and reduced graphene oxide/strontium pyro niobate (RGOSPN) nanostructures reveal excellent morphology. X-ray diffraction analysis of SPN and RGOSPN agree with standard data. Thermogravimetry–differential
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Enhanced electrochemical performances of activated carbon (AC)-nickel-metal organic framework (SIFSIX-3-Ni) composite and ion-gel electrolyte based supercapacitor Carbon Lett. (IF 1.992) Pub Date : 2021-01-04 Kyu Seok Lee, Ye Ji Seo, Hyeon Taek Jeong
In this study, we investigated that the activated carbon (AC)-based supercapacitor and introduced SIFSIX-3-Ni as a porous conducting additive to increase its electrochemical performances of AC/SIFSIX-3-Ni composite-based supercapacitor. The AC/SIFSIX-3-Ni composites are coated onto the aluminum substrate using the doctor blade method and conducted an ion-gel electrolyte to produce a symmetrical supercapacitor
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Characterization of prepared eco-friendly biochar from almond ( Terminalia catappa L) leaf for sequestration of bromophenol blue (BPB) from aqueous solution Carbon Lett. (IF 1.992) Pub Date : 2021-01-04 Jamiu Mosebolatan Jabar, Ignatius Adekunle Owokotomo, Yusuf Timilehin Ayinde, Ayodele Modupe Alafabusuyi, Gbolahan Olusayo Olagunju, Victor Oluwafemi Mobolaji
Novel eco-friendly adsorbents were prepared through pyrolysis and acid activation of raw almond leaf (RAL) to form almond leaf biochar (ALB) and chemically activated almond leaf biochar (CAL), respectively. The prepared adsorbents were characterized using TGA, FTIR, SEM–EDX, BET and XRD techniques and their physicochemical properties investigated. RAL, ALB and CAL were utilized for adsorption of BPB
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Probe on hard carbon electrode derived from orange peel for energy storage application Carbon Lett. (IF 1.992) Pub Date : 2021-01-04 T. Meenatchi, V. Priyanka, R. Subadevi, Wei-Ren Liu, Chia-Hung Huang, M. Sivakumar
Activated non-graphitizable hard carbon using orange peel with mesoporous structure has been prepared by pyrolyzation at 700, 800, 900 °C using chemical activation method. The activated orange peel-derived hard carbon has been characterized for its mesoporous and disordered structure. TG-DSC gives the information for the changes about sample composition and thermal stability of the materials. Increasing
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Activated carbons effectively purified by post-heat treatment under vacuum conditions Carbon Lett. (IF 1.992) Pub Date : 2021-01-03 Junam Kim, Hoai Van T. Nguyen, Gyung Jin Bahk, Kyungwon Kwak, Kyung-Koo Lee
The effect of heat treatment and vacuum conditions on the textural properties and electrochemical performance of commercially available activated carbons (ACs) was investigated. The AC after post-heat treatment was characterized by nitrogen adsorption–desorption, X-ray diffraction, Raman spectroscopy, X-ray photoelectron spectroscopy, and Fourier-transform infrared spectroscopy measurements. The ACs
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Production of activated carbon derived from agricultural by-products via microwave-induced chemical activation: a review Carbon Lett. (IF 1.992) Pub Date : 2021-01-03 Abdulbari A. Ahmad, Marwan Al-Raggad, Noama Shareef
Biomass of agricultural waste is getting increasing attention all over the world as it is a kind of renewable, abundantly available, low cost, and environmentally friendly resource. Preparation of activated carbon from agricultural waste via microwave-assisted chemical agent activation. The porosity, surface area, and functional and surface chemistry were featured by means of low-temperature nitrogen
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Waste plastic for increasing softening point of pitch and specific surface area of activated carbon based on the petroleum residue Carbon Lett. (IF 1.992) Pub Date : 2021-01-03 Cheol Hwan Kwak, Sang Wan Seo, Min Il Kim, Yun Suk Huh, Ji Sun Im
Pyrolysis fuel oil (PFO) is used for the manufacturing of high-purity pitch for carbon precursor due to its high carbon content, high aromaticity, and low heterogeneous element and impurity content. Pitch is commonly classified with its softening point, which is most considerable physical property affecting to various characteristics of the carbon materials based on pitch, such as electrical and thermal
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A comprehensive review on the dispersion and survivability issues of carbon nanotubes in Al/CNT nanocomposites fabricated via friction stir processing Carbon Lett. (IF 1.992) Pub Date : 2021-01-03 Abhishek Sharma, Gaurav Gupta, Jinu Paul
Aluminium metal matrix composites (AMMCs) are the fastest developing materials for structural applications due to their high specific weight, modulus, resistance to corrosion and wear, and high temperature strength. Carbon nanotubes (CNTs) is known as the material of the twenty-first century for its various applications in structural components for their high specific strength as well as functional
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A simple nonenzymatic glucose sensor based on coconut shell charcoal powder-coated nickel foil electrode Carbon Lett. (IF 1.992) Pub Date : 2021-01-03 Shuaib Edakkaparamban, Muhammed Shafi Parasseri, Gaurav Kumar Yogesh, Chandra Bose Arumugam, Sastikumar Dillibabu
In this work, a simple nonenzymatic glucose sensor has been proposed based on coconut shell charcoal (CSC) modified nickel foil as working electrode in a three-electrode electrochemical cell. Charcoal was prepared by the pyrolysis of coconut shells. The most important advantages of coconut shells are cost-effectiveness and their abundance in nature. The morphology and phase of the CSC powder were characterized
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A short review on electrochemical exfoliation of graphene and graphene quantum dots Carbon Lett. (IF 1.992) Pub Date : 2021-01-03 Wan Hazman Danial, Noriliya Aina Norhisham, Ahmad Fakhrurrazi Ahmad Noorden, Zaiton Abdul Majid, Kazunari Matsumura, Anwar Iqbal
The synthesis of graphene and graphene quantum dots (GQDs) employing various approaches with a range of precursors, chemicals, and parameters has been reported. Most of the top-down and bottom-up techniques employ strong and hazardous chemical environments, complicated and tedious procedures, are time-consuming, and often require special equipment. Another drawback of the techniques reported is the
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Preparation and characterization of chars and activated carbons from wood wastes Carbon Lett. (IF 1.992) Pub Date : 2020-11-22 Qiangu Yan, Jinghao Li, Zhiyong Cai
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Camphor leaf-derived activated carbon prepared by conventional physical activation and its water adsorption profile Carbon Lett. (IF 1.992) Pub Date : 2020-11-19 Chairunnisa, N. Takata, K. Thu, T. Miyazaki, K. Nakabayashi, J. Miyawaki
Preparation of activated carbon from biomass residue with conventional steam activation was conducted to find the alternative raw materials for meeting the high demand for low-cost porous material in the desiccant application. In this study, activated carbons were produced from dead camphor leaves using two-step methods at different preparation temperatures. The characterization results revealed that
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A recent trend: application of graphene in catalysis Carbon Lett. (IF 1.992) Pub Date : 2020-11-09 Yuxin Yan, Woo In Shin, Hao Chen, Shar-Mun Lee, Sivakumar Manickam, Svenja Hanson, Haitao Zhao, Edward Lester, Tao Wu, Cheng Heng Pang
Graphene, an allotrope of carbon in 2D structure, has revolutionised research, development and application in various disciplines since its successful isolation 16 years ago. The single layer of sp2-hybridised carbon atoms brings with it a string of unrivalled characteristics at a fraction of the price of its competitors, including platinum, gold and silver. More recently, there has been a growing
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Effect of crystallinity and particle size on coke-based anode for lithium ion batteries Carbon Lett. (IF 1.992) Pub Date : 2020-11-03 Seung Eun Lee, Ji Hong Kim, Young-Seak Lee, Byong Chol Bai, Ji Sun Im
This study examined the effects of micro- (crystallinity) and macro (orientation)-crystalline properties of graphite on the initial efficiency, discharge capacity, and rate performance of anodic materials. Needle coke and regular coke were selected as raw materials and pulverized to 2–25 μm to determine the effects of crystalline properties on particle shape after pulverization. Needle coke with outstanding
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Effects of pressurized PFO-based pitch coking conditions on coke yield and graphite conductivity Carbon Lett. (IF 1.992) Pub Date : 2020-11-02 Jong Hoon Cho, Byong Chol Bai
In the present study, pyrolyzed fuel oil (PFO)-based pitch without impurities was used to prepare coke under pressure, and the preparation yield and the powder resistance depending on the graphitization were investigated. The preparation yield of green coke by pressurized coking at 500 °C was about 26–27% higher than that at normal pressure. However, the coke yield after the thermal treatment of green
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Evaluation of the sp 3 /sp 2 ratio of DLC films by RF-PECVD and its quantitative relationship with optical band gap Carbon Lett. (IF 1.992) Pub Date : 2020-11-02 Hongxun Sheng, Wenwen Xiong, Songsheng Zheng, Chao Chen, Song He, Qijin Cheng
DLC has been attractive as semiconductor materials for solar cell due to its biological friendliness, flexible microstructures, and especially its tunable band gap. In order to fabricate high-efficiency multiband gap solar cell, it is important to control the sp3/ sp2 bonds ratio of DLC film corresponding to optical band gap (Eg). There are many references reporting the relations among the fabrication
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Modification of the graphene oxide surface with copper pentacyanonitrosylferrate nanoparticles for electro-oxidation of hydrazine Carbon Lett. (IF 1.992) Pub Date : 2020-11-01 Vitor Alexandre Maraldi, Devaney Ribeiro do Carmo
The preparation of graphene oxide and the modification of its surface directly with copper pentacyanonitrosylferrate (III) nanoparticles are presented in this work, as well as the characterization of the materials using Fourier-transform infrared spectra, X-ray diffractometry and scanning electron microscopy techniques. Beyond that, the study on the electrochemical behavior of the dispersed bimetallic
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DFT and experimental study on adsorption of dyes on activated carbon prepared from apple leaves Carbon Lett. (IF 1.992) Pub Date : 2020-10-12 Mohamed Helmy Abdel-Aziz, Elsayed Zakaria El-Ashtoukhy, Mohamed Bassyouni, Ahmed Farouk Al-Hossainy, Eman M. Fawzy, Shereen M. S. Abdel-Hamid, Mohamed Shafick Zoromba
This work reports utilization of apple leaves as a source of activated carbon. Activated carbon from apple leaves is prepared by two different methods, thermal activation where AC1 is obtained and chemical activation using H3PO4 and ZnCl2 where AC2 and AC3 are obtained, respectively. XRD analysis revealed that all types of prepared ACs have a semi-crystalline nature with a mean crystallite size of
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Interaction of carbon nanotubes with plant system: a review Carbon Lett. (IF 1.992) Pub Date : 2020-10-12 Silvy Mathew, D. K. Tiwari, Dhananjay Tripathi
Recent years have witnessed remarkable development in the field of nanotechnology and it has been affirmed that carbon-based nanomaterials have wide applications in agriculture, industrial, biomedical and environmental sectors. Due to distinctive physicochemical properties of the carbon nanotubes (CNTs), they have been extensively utilized in plant science as a growth promoter, and thus, could be a
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Nonlinear buckling analysis of double-layered graphene nanoribbons based on molecular mechanics Carbon Lett. (IF 1.992) Pub Date : 2020-10-06 Mohammad Sadegh Namnabat, Amin Barzegar, Emilio Barchiesi, Mahdi Javanbakht
Double-layer graphene nanoribbons promise potential application in nanoelectromechanical systems and optoelectronic devices, and knowledge about mechanical stability is a crucial parameter to flourish the application of these materials at the next generation of nanodevices. In this paper, molecular mechanics is utilized to investigate nonlinear buckling behavior, critical buckling stress, and lateral
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Enhancing the performance of supercapacitor electrode from chemical activation of carbon nanofibers derived Areca catechu husk via one-stage integrated pyrolysis Carbon Lett. (IF 1.992) Pub Date : 2020-10-03 Erman Taer, Friska Febriyanti, Widya Sinta Mustika, Rika Taslim, Agustino Agustino, Apriwandi Apriwandi
A carbon nanofiber was produced from the Areca catechu husk as a supercapacitor electrode, utilizing a chemical activation of potassium hydroxide (KOH) at different concentrations. One-stage integrated pyrolysis both carbonization and physical activation were employed for directly converting biomass to activated carbon nanofiber. The morphology structure, specific surface area, pore structure characteristic
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Triazine-based 2D covalent organic framework-derived nitrogen-doped porous carbon for supercapacitor electrode Carbon Lett. (IF 1.992) Pub Date : 2020-10-03 Stella Vargheese, Muthu Dinesh, K. V. Kavya, Dhanaprabhu Pattappan, Ramasamy Thangavelu Rajendra Kumar, Yuvaraj Haldorai
Doped porous carbon materials have attracted great interest owing to their excellent electrochemical performance toward energy storage applications. In this report, we described the synthesis of nitrogen-doped porous carbon (N-PC) via carbonization of a triazine-based covalent organic framework (COF) synthesized by Friedel–Crafts reaction. The as-synthesized COF and N-PC were confirmed by X-ray diffraction
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Enhanced electrical conductivity of doped graphene fiber via vacuum deposition Carbon Lett. (IF 1.992) Pub Date : 2020-10-01 Beum Jin Park, Ho Seok Park
Graphene fiber is considered as a potential material for wearable applications owing to its lightness, flexibility, and high electrical conductivity. After the graphene oxide (GO) solution in the liquid crystal state is assembled into GO fiber through wet spinning, the reduced graphene oxide (rGO) fiber is obtained through a reduction process. In order to further improve the electrical conductivity
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Production of B-doped reduced graphene oxide using wet-process in tetrahydrofuran Carbon Lett. (IF 1.992) Pub Date : 2020-09-30 Yunseok Shin, Sungjin Park
Graphene-based materials show excellent properties in various applications because of their electrical properties, large surface areas, and high tolerance for chemical modification. The use of wet-process is a promising way for their mass production. Heteroatom doping is one of the common methods to improve their electrical, physical, and electrochemical properties. In this work, we develop a new route
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Valorization of spent activated carbon in glycerine deodorization unit for methylene blue removal Carbon Lett. (IF 1.992) Pub Date : 2020-09-26 Tang Shu Hui, Muhammad Abbas Ahmad Zaini
Spent Calgon Filtrasorb activated carbon (SAC) from glycerine deodorization unit was evaluated for the removal of methylene blue (MB). The SAC was used without further modification. The SAC was characterized for BET surface area, pH, pHpzc and FTIR to determine the textural and chemical properties of SAC. The batch adsorption study of MB was carried out under different initial concentrations (5–500 mg/L)
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Electrical percolation and fluidity of conductive recycled mortar cement: graphite powder: recycled sand with addition of industrial waste carbon fiber Carbon Lett. (IF 1.992) Pub Date : 2020-09-22 C. A. Espinoza-Moreno, M. Rodriguez-Rodriguez, M. J. Pellegrini-Cervantes, C. P. Barrios-Durstewitz, R. E. Núñez-Jaquez, H. J. Peinado-Guevara, M. Chinchillas-Chinchillas, G. Fajardo-San-Miguel
The use of recycled materials, such as the fine recycled aggregate made from concrete waste and carbon fiber (CF) product of industrial waste, for the manufacture of conductive recycled mortars (CRM), transforms the mortar base cement normally made with cement:sand in a sustainable multifunctional material, conferring satisfactory mechanical and electrical properties for non-structural uses. This action
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Activated carbon@MgO@Fe 3 O 4 as an efficient adsorbent for As (III) removal Carbon Lett. (IF 1.992) Pub Date : 2020-09-19 Hossein Esmaeili, Seyyed Mojtaba Mousavi, Seyyed Alireza Hashemi, Wei-Hung Chiang, Somayeh Ahmadpour Abnavi
In this study, Fe3O4/MgO/Activated carbon composite was used to remove arsenic ion (As (III)) from aqueous media. To this end, Frangula Alnus was used to prepare activated carbon (AC) by calcination in the furnace at 700 °C for 4 h and was then used to synthesize the MgO/Fe3O4/AC composite. To study the surface properties of the composite, various analyses such as SEM, EDX/Mapping, FTIR, DLS, BET and
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Synthesis and characterization activated carbon using a mix (asphalt-polypropylene waste) for novel azo dye (HNDA) adsorption Carbon Lett. (IF 1.992) Pub Date : 2020-09-18 Homam T. S. AL-Sayd Toohi, Muwafaq Ayesh Rabeea, Jasim Ali Abdullah, Rasim Farraj Muslim
This work reveals a modified method for the preparation of activated carbon (P-ACA) using low-cost materials (mix natural asphalt: polypropylene waste). The P-ACA was prepared at 600 °C by assisting KOH and HF. The morphological variations and chemical species of the P-ACA were characterized using SEM–EDX and FTIR. The active surface area, density and ash content of the P-ACA were also investigated
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Activated carbon microspheres derived from hydrothermally treated mango seed shells for acetone vapor removal Carbon Lett. (IF 1.992) Pub Date : 2020-09-15 Robson C. de Andrade, Rodrigo S. Gonzaga Menezes, Raildo A. Fiuza-Jr, Heloysa Martins Carvalho Andrade
Mango fruit seed shells were used as starting materials to produce activated carbons for the capture of acetone, a typical volatile organic compound (VOC), from gaseous streams. This fruit waste presents high volatiles and low ashes contents, as expected for the lignocelulosic materials commonly used for the preparation of activated carbons. The starting material was hydrothermally treated at 180 or
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Nanostructures and nanomechanical properties of ion-irradiated HOPG Carbon Lett. (IF 1.992) Pub Date : 2020-09-14 Yuying Zhou, Ying Wang, Qiantao Lei, Qing Huang, Wei Zhang, Long Yan
Highly Oriented Pyrolytic Graphite (HOPG) was half covered using aluminum foil and exposed to irradiation with 70 keV C+ ions at room temperature (~ 25 ℃). The surface layer (height = 178.3 ± 4.7 nm) of the irradiated area was destroyed, many nano-sized dendritic protrusions were observed and smooth inner layer was exposed. The peak area ratio (ID/IG) in Raman spectra increased after ion irradiation
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Concentration-dependent emission of nitrogen-doped carbon dots and its use in hazardous metal-ion detection Carbon Lett. (IF 1.992) Pub Date : 2020-09-09 Jayasmita Jana, Seung Hyun Hur
Nitrogen-doped carbon dots (CDts) with tunable fluorescence properties in aqueous media were synthesized hydrothermally. The excitation wavelength variation to obtain the maximum emission produced a blue shift in the emission peaks upon dilution in an aqueous solution. The shift can be explained by a re-absorption phenomenon in a concentrated solution. The interparticle interaction within was responsible
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Highly efficient removal of toxic ions by the activated carbon derived from Citrus limon tree leaves Carbon Lett. (IF 1.992) Pub Date : 2020-09-04 Fahime Nemati, Dariush Jafari, Hossein Esmaeili
The purpose of this study was to remove lead and arsenic ions from aqueous solutions using the activated carbon prepared from Citrus limon tree leaves. Characteristics of the prepared adsorbent were studied thoroughly using BET, SEM, EDS and mapping, XRD, and RAMAN analyses. The results of experiments showed that the highest adsorption efficiencies were 97.67% and 95.89% for Pb (II) and As (III), respectively
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Lithium-protective hybrid lithium-air batteries with CF x , MoS 2 , and WS 2 composite electrodes Carbon Lett. (IF 1.992) Pub Date : 2020-08-29 Yusong Choi, Mark H. Griep, Ji-Youn Kim, Tae-Young Ahn, Tae Ryong Park, Hye-Ryeon Yu, Jang-Hyeon Cho
Numerous studies have addressed the commercial viability of lithium–air batteries (LABs). However, the high reactivity of Li with air moisture and CO2 has hindered the broad applicability of LABs. In this study, lithium-protective hybrid lithium–air batteries (HLABs) were fabricated with Super P (SP) and composites of fluorinated carbon (CFx), MoS2, and WS2 as the cathodes. Subsequently, their potential
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Structural and electronic properties of 2D-activated carbon sheet Carbon Lett. (IF 1.992) Pub Date : 2020-08-29 Ratnesh Kumar, Abhishek Kumar, B. Keshav Rao, Ambrish K. Srivastava, Mohan L. Verma, Neeraj Misra
A simulation based (DFT) study is performed on activated 2D-carbon sheet without and with vacancies of central carbon atoms, and explored the electronic properties. The inter-atomic distance at the center of activated carbon sheet is gradually increased with increasing number of vacancies. We get lower binding energy with three vacancies, and higher without a vacancy. A covalent bond is found between
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A study on the machinability of advanced arc PVD AlCrN-coated tungsten carbide tools in drilling of CFRP/titanium alloy stacks Carbon Lett. (IF 1.992) Pub Date : 2020-08-28 Dave Kim, Sam R. Swan, Bin He, Viktor Khominich, Eric Bell, Seok-Woo Lee, Tae-Gon Kim
This study aims to investigate the effect of an aluminum chromium nitride (AlCrN) coating on tool wear and hole quality in the conventional drilling process of carbon fiber-reinforced plastic (CFRP) composites, titanium alloy (Ti), and CFRP–Ti stack workpieces popular in the aerospace industry. The advanced arc plasma acceleration (APA) method of physical vapor deposition (PVD) was used for all AlCrN
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Sensing behavior of Cu-embedded C 3 N monolayer upon dissolved gases in transformer oil: a first-principles study Carbon Lett. (IF 1.992) Pub Date : 2020-08-27 Wen Cao, Chunmei Liu, Pengfei Jia, Hao Cui
Using first-principles theory, this work investigated the Cu-doping behavior on the N-vacancy of the C3N monolayer and simulated the adsorption performance of Cu-doped C3N (Cu–C3N) monolayer upon two dissolved gases (H2 and C2H2). The calculations meant to explore novel candidate for sensing application in the field of electrical engineering evaluating the operation status of the transformers. Our
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Vertically aligned carbon nanotubes-coated aluminium foil as flexible supercapacitor electrode for high power applications Carbon Lett. (IF 1.992) Pub Date : 2020-08-16 Viney Ghai, Kingshuk Chatterjee, Prabhat K. Agnihotri
Vertically Aligned Carbon Nanotubes (VACNTs)-coated flexible aluminium (Al) foil is studied as an electrode for supercapacitor applications. VACNTs are grown on Al foil inside thermal Chemical Vapor Deposition (CVD) reactor. 20 nm thick layer of Fe is used as a catalyst while Ar, H2 and C2H2 are used as precursor gases. The effect of growth temperature on the structure of CNTs is studied by varying
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A theoretical investigation of electronic and optical properties of (6,1) single-wall carbon nanotube (SWCNT) Carbon Lett. (IF 1.992) Pub Date : 2020-08-10 D. P. Rai, Y. T. Singh, B. Chettri, M. Houmad, P. K. Patra
We report the comparative study of electronic and optical properties of (6,1) SWCNT from GGA and DFT-1/2 methods. (6,1) SWCNT is a low-bandgap semiconductor, which falls within (\(n_1-n_2\))/3\(\ne \,\) integer. The calculated bandgaps are 0.371 eV and 0.462 eV from GGA and DFT-1/2, respectively. Thus, DFT-1/2 enhanced the electronic bandgap by 24.52%. From both GGA and DFT-1/2 approaches (6,1) SWCNT
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Surface oxidation of PAN-based ultrahigh modulus carbon fibers (UHMCFs) and its effect on the properties of UHMCF/EP composites Carbon Lett. (IF 1.992) Pub Date : 2020-08-09 Xinyu Wang, Xin Qian, Yonggang Zhang, Xuefei Wang, Shulin Song, Cheng Zhang
In this study, nitric acid oxidation with varied treatment temperature and time was conducted on the surfaces of polyacrylonitrile-based ultrahigh modulus carbon fibers. Scanning electron microscopy, X-ray photoelectron spectroscopy, Raman spectroscopy and surface tension/dynamic contact angle instruments were used to investigate changes in surface topography and chemical functionality before and after
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Thermal conductivities of a needle-punched carbon/carbon composite with unbalanced structures Carbon Lett. (IF 1.992) Pub Date : 2020-08-06 Jungmin Lee, Hyung Ik Lee, Jong Gyu Paik
The XYZ 3-dimensional thermal conductivities of the C/C up to 2000 °C were measured by a laser flash method. Carbon fiber-reinforced carbon composites (C/C) were generally developed for aerospace missions due to their excellent thermal resistivity at ultrahigh temperature. C/C must endure harsh environments such as thousands of degrees Celsius without degradation of its mechanical properties. To solve
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Facile preparation of ZnO quantum dots@porous carbon composites through direct carbonization of metal–organic complex for high-performance lithium ion batteries Carbon Lett. (IF 1.992) Pub Date : 2020-08-04 Yun Ji Oh, Min Chang Shin, Jae Ho Kim, Seung Jae Yang
Nanostructured ZnO materials have been studied extensively because of their functional properties. This paper presents a composite material of zinc oxide quantum dots (ZnO QDs) and porous carbon using a one-step carbonization process. The direct carbonization of a metal–organic complex generates mesostructured porous carbon with a homogeneous distribution of ZnO QDs. The structural and morphological
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Biodiesel flames as a unique pyrolyzing carbon source for the synthesis of hydrophobic carbon films Carbon Lett. (IF 1.992) Pub Date : 2020-08-04 Duncan Merchan-Breuer, Ethan Murphy, Benjamin Berka, Elena Echeverria, David N. McIlroy, Wilson Merchan-Merchan
We report the rapid single-step flame synthesis of hydrophobic carbon layers (C-layers) on the surface of stainless-steel (SS) substrates using vaporized biodiesel as the fuel. A co-flow canola methyl ester/air diffusion flame is used to generate a hydrophobic monolayer on the surface of the metal substrate upon its insertion into the reaction zone. Carbon deposition on the surface of the SS substrates
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Surface functionalization methodologies on activated carbons and their benzene adsorption Carbon Lett. (IF 1.992) Pub Date : 2020-08-03 Prabhu Azhagapillai, Ahmed Al Shoaibi, Srinivasakannan Chandrasekar
The present work reports the effect of different functionalization methodologies on surface modification of porous carbon and its efficacy for benzene adsorption. The virgin and surface-modified adsorbents were characterized by FTIR, N2 sorption analysis, SEM, and Boehm titration. The adsorption isotherms were measured at different temperatures using a highly sensitive magnetic suspension microbalance
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Computational evaluation of the mechanical properties of synthesized graphene quantum dots under consideration of defects Carbon Lett. (IF 1.992) Pub Date : 2020-08-03 Moones Rahmandoust
The behaviour of semiconducting graphene quantum dots (GQDs), as good candidates for various biological carrier applications and optical sensing, are necessary to be studied under various conditions. In this study, GQD models were generated according to the geometrical and chemical specifications of synthesized GQDs to achieve the most realistic models. The GQDs’ bandgap and distribution of their electric
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Carbon fiber coating with MWCNT in the presence of polyethyleneimine of different molecular weights and the effect on the interfacial shear strength of thermoplastic and thermosetting carbon fiber composites Carbon Lett. (IF 1.992) Pub Date : 2020-07-27 Dongkyu Lee, Youngeun Kim, Oh Hyeong Kwon, Won Ho Park, Donghwan Cho
The effect of multi-walled carbon nanotubes (MWCNT) coating in the presence of polyethyleneimine (PEI) of different molecular weights (MW) on the interfacial shear strength (IFSS) of carbon fiber/acrylonitrile–butadiene–styrene (ABS) and carbon fiber/epoxy composites was investigated. The IFSS between the carbon fiber and the polymer was evaluated by means of single fiber microbonding test. The results
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Rapid chemical vapor deposition of graphene using methanol as a precursor Carbon Lett. (IF 1.992) Pub Date : 2020-07-22 Imbok Lee, Jungtae Nam, Sang Jun Park, Dong Jae Bae, Suklyun Hong, Keun Soo Kim
In this study, graphene was rapidly grown by chemical vapor deposition using a liquid cell for supplying methanol as a carbon source of graphene. To realize the rapid growth, methanol which is carbon-contained organic solvent was used instead of methane gas, a widely used carbon source for graphene growth. The graphene grown with the growth time as a variable was transferred to a SiO2/Si substrate
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Fabrication and growth mechanism of ultra-crystalline C 60 on silicon substrate in vacuum Carbon Lett. (IF 1.992) Pub Date : 2020-07-22 Hongyu Wang, Ashutosh Rath, Shu Hearn Yu, Meng Seng Tan, Stephen J. Pennycook, Daniel H. C. Chua
We report a simple procedure to fabricate single crystals 3D C60 having an FCC structure on silicon substrates using a vapour–solid set-up in vacuum conditions. The morphology of the deposited film can be tuned by controlling the temperature and position of the substrate. The as-fabricated samples are extensively characterised by transmission electron microscopy, scanning electron microscope, X-ray
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Synthesis of quinozilinium fluoroborate salts from harmine Carbon Lett. (IF 1.992) Pub Date : 2020-07-13 Sivanath Musunuri, Reddymasu Sreenivasulu, Kit-Kay Mak, Mallikarjuna Rao Pichika, Mandava Venkata Basaveswara Rao
Abstract Molecules possessing harmine moiety are reported to exhibit marked fungicidal and bactericidal activities. In this study, various quinozilinium tetrafluoroborate salts were synthesized using acylic and cyclic oxoketene dithioacetals followed by cycloaromatization from Harmine. All of these synthesized compounds were characterized by 1H NMR, 13C NMR, Mass and CHN analysis. This methodology
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Free arc liquid-phase dispersion method for the preparation of carbon nanotube dispersion Carbon Lett. (IF 1.992) Pub Date : 2020-07-02 Shaolong Li, Youdong Ci, Da Zhang, Chuanqi Zhang, Yan He
In this study, a new method of rapid preparation of carbon nanotube (CNT) solution with highly dispersed morphology by free arc excitation is proposed, which shortens the time of the preparation of CNT solution with low concentration. The principle is that the high-energy flow density heat generated by the free arc makes the vaporizable substance coated on the surface of CNTs vaporize rapidly, and
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Oriented wrinkle textures of free-standing graphene nanosheets: application as a high-performance lithium-ion battery anode Carbon Lett. (IF 1.992) Pub Date : 2020-06-23 Hee-Sung Jeong, Jongsoon Kim, Kyoung-Il Jo, Jinho Kee, Jae-Hak Choi, Jaseung Koo
Morphology control of a graphene nanosheet (GNS) is important for graphene-based battery electrodes to exhibit the increased practical surface area and the enhanced ion diffusion into the nanosheets. Nevertheless, it is very difficult to minutely control the shape of graphene nanosheets based on the conventional GNS suspension methods. In this work, we fabricated wrinkle textures of free-standing GNS
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