Quantum dots (QDs) are attracting significant attention for the development of sensitive detection methods because of their unique optical properties. Biosynthetic QDs using organisms is a promising alternative route to chemical synthesis because it is a simple and eco-friendly process. Herein, we developed a straightforward and green system for the biological assembly of CdSxSe1-x QDs by Phomopsis

Awareness about environmental impact of petroleum sourcing polymeric materials is leading to an increased interest sustainable materials manufacturing. Here we present the elaboration of fully bio-based materials using an aromatic epoxy resin matrix coming from wood biomass and two natural side-products, namely keratin from chicken feathers and lignin. In situ FTIR kinetic studies show that the two

N-doped carbon material, graphitic carbon nitride (gCN), is a semiconductor with high mechanical and thermal stability, which provides good dispersion of metal particles. As it is resistant to corrosion, it constitutes an alternative to carbon black as a catalyst support in polymer electrolyte membrane fuel cells (PEMFCs), e.g. in alcohol oxidation reactions. Due to the fact that its composition (C:N

Selective oxidation of cyclohexane to KA oil (cyclohexanol and cyclohexanone) is one of the most important industrial procedure. In this study, we reported a remarkably enhanced cyclohexane oxidation under visible light irradiation by a novel [email protected]/[email protected] composite photocatalyst with multilevel hierarchy, which was prepared by immersing (NH4)2MoS4 guest into Cu−MOF polyhedra

It is challenging to explore non-noble metal-based electrocatalysts with high-performance and long-term stability for oxygen evolution reaction (OER). Herein, urchin-like iron-doped nickel cobalt phosphide (FeNiCoP) with hierarchical nanoarray structures and fine-tuned doped Fe content are fabricated through a simple hydrothermal method and subsequent phosphorization process. The optimized FeNiCoP

Superamphiphobic coating has significant applications in self-cleaning and anti-fouling materials. Herein, chitin nanocrystals (ChNCs) with a needle-like morphology as building blocks were modified by thiol-groups and highly fluorinated long chains to reduce the surface free energy. The prepared superamphiphobic ChNC particles were performed with a series of morphological and physicochemical characterizations

Ethyl 2-bromo-2,2-difluoroacetate reacted with alkenes during irradiation by a blue LED (470 nm) in the presence of 10 mol% fluorescein to achieve the visible light-driven direct 2,2-difluoroacetylation; the combination of N,N,N,N-tetramethylethylenediamine (TMEDA) as a reducing agent and 1-methyl-2-pyrrolidinone (NMP) as the solvent was essential to afford the desired 2,2-difluoroacetyl compounds

Currently, Cu-based catalyst has become a promising candidate for ethanol and higher alcohols (HA) from synthesis gas (H2+CO), but all these catalysts contain F-T elements (e.g. Co, Fe) and alkalis since carbon chain growth reaction occurs on these metal components. Herein, two series of ternary CuZnAlOOH catalysts with various Cu and Al proportions were synthesized using a complete liquid-phase (CLP)

In this study, a facile and green route was designed using hydrolyzed chitosan as precursor to fabricate superior molecular state fluorophores based on Maillard reaction (MR). The fluorophores exhibit excitation-dependent photoluminescence behavior, emitting multicolor fluorescence. The CCK-8 assay shows the low cytotoxicity of the Maillard reaction products (MRPs). The properties of the MRPs were

Interfacial enzyme reactions require formation of an enzyme-substrate complex at the surface of a heterogeneous substrate, but often multiple modes of enzyme binding and types of binding sites complicate analysis of their kinetics. Excess of heterogeneous substrate is often used as a justification to model the substrate as unchanging; but using the study of the enzymatic hydrolysis of insoluble cellulose

The bio-based poly(limonene carbonate) (PLimC) has large potential as sustainable biobased engineering polymer due it promising property profile and the availability of the raw materials from non-eatable resources (limonene (LO) from e. g. orange shells). PLimC and related terpene-based polycarbonates have not been processed from the melt state successfully which is due to its low decomposition temperature

To develop a method for preparing rapidly, precisely and bio-orthogonally crosslinked enzyme (RP-CLEs), nonstandard amino acids (NSAAs) were inserted into the enzyme protein, and microwave irradiation is used to accelerate the site-specific linkage through Cu-free strain-promoted alkyne-azide cycloaddition (SPAAC). To this end, we selected aldehyde ketone reductase (AKR) as model enzyme, and AKR mutants

Vitrimers are covalent polymer networks that can change their topology through thermally activated bond exchange reactions. In this work fully biobased and recyclable vitrimers were developed from epoxidised soybean oil (ESO) and natural glycyrrhizic acid (GL) as it was without additional chemical modification, which avoided the use of nonrenewable petroleum resources and resolved the disposal problems

A study is conducted to evaluate the carbonation processes from rubblized concrete (RC) as it relates to CO2 sequestration and carbon life-cycle analyses for cement and concrete industries. In a one-year time frame, this study demonstrated that during direct carbonation, RC absorbs up to 56 mg/g of CO2 when pretreated (suitable for mineral carbonation technology - MCT) and 19 mg/g of CO2 when unprocessed

Xylose utilization by Corynebacterium glutamicum is an essential but unresolved issue in glutamic acid production from lignocellulose biomass. Co-existence of xylose with inhibitors requires a selective removal of inhibitors while the xylose is still well retained in the pretreated lignocellulose feedstock. Not only is xylose assimilation in C. glutamicum at low efficiency, but also there are unique

Hemp fibers are broadly used in industrial applications for their mechanical properties, in particular their Young’s modulus (YM) that is comparable to glass fibers, and for their low density, which makes them suitable for environmentally friendly alternatives to petrochemical compounds in applications such as in construction, bioplastics or composite materials. However, their sensitivity to humidity

Without introducing any surfactants and capping agents, concave Pt nanocubes, willow-like Pt nanocrystals and spherical Pt nanoparticles were synthesized at different deposition potentials through square-wave potential electrodeposition procedure. As the deposition potentials decreased from the double layer region to the hydrogen underpotential deposition region and finally into the hydrogen evolution

Poly (N-phenylglycine) (PNPG), an original pseudocapacitive conjugative-conducting polymer (CP), was synthesized by electro-oxidative polymerization method. The synthesis process involves in-situ polymerization and electro-deposition of N-phenylglycine onto the surface of highly conductive, few-layered, exfoliated-flexible graphite sheets (E-FGS). At first, the promising features of the conjugative

The practice of site control for functional groups to achieve better interactions has become popular in recent years. Capitalizing on such developments, sulfonated 5-carboxybenzotriazole (SCBTA), serving as a new monomer that combines multiple functional groups, is grafted onto pendant chains of poly (arylene ether ketone) (PAEK) via amidation reaction to fabricate a series of novel proton exchange

The reductive amination (RA) of 2-hydroxytetrahydropyran (2-HTHP) produced from bio-furfural-derived dihydropyran provides a new efficient process for the clean synthesis of valuable 5-amino-1-pentanol (5-AP). Among various solid catalysts tested, the inexpensive Ni-Mg3AlOx catalysts derived from hydrotalcite precursors were found to be very active and selective, especially at Ni loadings above 20

An ammonium chloride roasting approach can covert lithium metal oxides to water-soluble lithium and transition metal chlorides at 300 oC, promising an energy-efficient and environmentally benign way to recover end-of-life lithium-ion batteries. Unlike conventional chlorination processes, the roasting of LiCoO2 using NH4Cl as both reducing and chlorination agents is complex, thus more efforts such as

Enzymes selectively hydrolyze the carbohydrate fractions of lignocellulosic biomass into corresponding sugars, but these processes are limited by low yields and slow catalytic turnovers. Under certain conditions, the rates and yields of enzymatic sugar production can be increased by pretreating biomass using solvents, heat and dilute acid catalysts. However, the mechanistic details underlying this

Biomass is a renewable and sustainable energy resource. Current design of biomass handling and feeding equipment leverage both experiments and numerical modeling. This paper reviews the state-of-the-art discrete element methods (DEM) for the flow of milled biomass (Part-I), accompanied with a comprehensive review on continuum-based computational models (Part-II). The present review on DEM is primarily

The design of efficient material-handling systems for milled lignocellulosic biomass is challenging due to their complex particle morphologies and frictional interactions. Computational modeling, including the discrete element method (DEM) and continuum-based finite-element/volume methods, may offer scientific insight and predictive capabilities for the flow of milled biomass in hoppers and feeders

Tailoring the composition and morphology of electrocatalysts has been regarded as an effective alternative to improve their catalytic performance by forming and exposing more active sites. Herein, a rapid thermal annealing (RTA) strategy is proposed to mass produce two-dimensional (2D) cobalt-fluoride-oxide phase electrocatalysts in air at 400 oC (CFO-RH400) from crystalline fluoride hydrates, with