Showing papers in "Green Chemistry in 2020"

TL;DR: Poly(hydroxyalkanoate)s (PHAs) represent a promising solution to allay climate change and plastic waste pollution and can approach a carbon neutral platform whereas petroleum-based plastics cannot.

TL;DR: A review of green extraction techniques and their role in promoting sustainable ingredients for the food, cosmetic and pharmaceutical industries is presented in this paper, where the authors focus on the strategies and present them as success stories for research and education and at the industrial scale.

TL;DR: In this review, significant recent advancements pertaining to the biomedical and therapeutic applications of lignin nanoparticles are highlighted including their greener synthetic options.

TL;DR: In this article, a review of the most adopted strategies to enhance the sustainability of materials in classical DSSC components (e.g., sensitizer, redox couple, electrolyte and counter-electrode), including smart synthesis and deposition procedures, is presented.

TL;DR: In this article, the flame-retardancy effects of pristine lignin and chemically modified Lignin derivatives by introducing the elements phosphorus and/or nitrogen, as well as their synergistic effects with existing flame retardant additives are evaluated.

TL;DR: In this article, the main routes to prepare spherical lignin particles, highlighting aspects associated to their shape and topology as well as performance, are described, and the state of the particles is furthermore compared in terms of their applicability in dry and wet forms.

TL;DR: In this article, a two-step aqueous alkaline hydrolysis was carried out on different types of real PET plastic waste under mild conditions (≤80 °C under atmospheric pressure).

TL;DR: Poly(glycolic acid) (PGA) has a similar chemical structure to PLA but without the methyl side group, which allows the polymer chains to pack together tightly and results in a high degree of crystallinity (45-55%), high thermal stability (Tm = 220-230 °C), exceptionally high gas barrier (3 times higher than EVOH), as well as high mechanical strength (115 MPa) and stiffness (7 GPa) as discussed by the authors.

TL;DR: The linear economy for plastic packaging, which currently leads to excessive carbon dioxide emissions and leakage into the environment, needs to be reformed to a greener circular model which is resource efficient and environmentally benign as mentioned in this paper.

TL;DR: In this article, the authors summarized several homogeneous catalytic processes involving the nucleophilic addition of CO2, resulting in C-C and C-H bond formation leading to the synthesis of 2-oxazolidinones, aminals, terminal carboxylated products and indolelactone derivatives that are potentially sound for the pharmaceutical industry.

TL;DR: In this paper, a critical review investigates the issues of lithium ion battery recycling and discusses the aspects of pack, module and cell design that can simplify battery dismantling and recycling, highlighting not only Green aspects of elemental recovery, but also technoeconomic features which may govern the appropriate direction for recycling.

TL;DR: In this paper, a mild and eco-friendly visible-light-induced decarboxylative acylation of quinoxalin-2(1H)-ones and α-oxo carboxylic acids with ambient air as the sole oxidant at room temperature was established.

TL;DR: In this article, a salt template-assisted approach through direct calcination of a mixture of ruthenium oleate precursor and sodium sulfate for one-step synthesis of Ru NCs solidly loaded on the simultaneously formed porous carbon (Ru/PC).

TL;DR: A review of the literature on plasma-driven ammonia synthesis is presented in this article, where the authors distinguish between mechanisms for ammonia synthesis in the presence of a plasma, with and without a catalyst, for different plasma conditions.

TL;DR: In this paper, the facile assembly of uniformly distributed CdS nanoparticles (NPs) on the two-dimensional (2D) platform of Ti3C2Tx MXene nanosheets (NSs) via a low-temperature wet chemistry process was reported.

TL;DR: In this article, the potentialities of photocatalytic Hydrogen Atom Transfer (HAT) for the late stage functionalization (LSF) of complex molecules is offered. And the examined approach allows the smooth homolytic cleavage of the C-H bonds embedded in the substrate, offering a straightforward access to valuabe C-centred radical intermediates to be exploited for the desired transformations.

TL;DR: In this paper, the design and preparation of noble-metal-free catalysts for the electrochemical nitrogen reduction reaction (NRR) to ammonia under ambient conditions has great significance in fertilizer production and energy storage.

TL;DR: This tutorial will provide an easily accessible introduction which will enable synthetic chemists new to the field to explore electrochemistry, and discuss mechanistic considerations, the setup of an electrochemical reaction with all its components, trouble shooting and selected examples from the literature.

TL;DR: In this article, a simple and robust experimental method to identify suitable deep eutectic solvents (DESs) for recycling spent lithium-ion batteries (LIBs) was proposed.

TL;DR: In this article, a green, cheap and safe approach is proposed by using a choline chloride-citric acid deep-eutectic solvent (DES) as lixiviant.

TL;DR: In this paper, the authors present an overview on the latest trends in hydrothermal carbonisation including biomass to bioenergy conversion, upgrading of hydro-thermal carbons to fuels over heterogeneous catalysts, advanced carbon materials and their applications in batteries, electrocatalysis and heterogeneous catalysis and finally an analysis of the chemicals in the liquid phase as well as a new family of fluorescent nanomaterials formed at the interface between the liquid and solid phases.

TL;DR: In this article, a traditional fractionation technique was applied to the preparation of lignin nanoparticles (LNPs) and the prepared LNPs showed controllable sizes (21 −139 nm) with very narrow size distributions.

TL;DR: In this article, the synthesis of sulfide imidazopyridine scaffolds from vinyl azides, thiophenols, and pyridines via a radical [3 + 2] cycloaddition was reported.

TL;DR: In this paper, a review of the recent advances in catalysts for phenol HDO and the understanding of the reaction mechanisms involved is presented, aiming to provide a perspective for developing highly efficient HDO catalysts.

TL;DR: In this paper, a comprehensive survey of the solvents and operational conditions employed in the biphasic dehydration of sugars to 5-HMF and furfural, followed by an account of the selection guides and methods for the evaluation of Solvents, including COSMO-RS.

TL;DR: In this paper, a review summarizes the development of CTFs and its application in gas storage and separation, pollutant removal and catalysis, and a critical outlook from a sustainable perspective on its design as well as application is provided focusing on its practical implementation.

TL;DR: The use of renewable energy resources without the need for prefunctionalization of the reactant synergistically promote the synthetic pathway towards green synthesis as discussed by the authors. But the applicability and mechanistic pathways of the methodologies have been also discussed.

TL;DR: In this paper, the electrocatalytic performance of cobalt oxide (CoO) could be significantly improved by introducing oxygen vacancies via Se doping, and the resulting CoO-CoSe2 showed excellent performance and stability for the electro-oxidation of 5-hydroxymethylfurfural (HMF) to 2,5-furandicarboxylic acid (FDCA).

TL;DR: In this article, the electrochemical properties of biochar with various theoretical, methodological, and experimental approaches are summarized and highlighted, and new perspectives on electrochemical carbocatalysis of Biochar to guide future environmental applications.

TL;DR: In this article, a VO-based vitrimer elastomer is prepared by curing of a VO derived dimer acid (DA) and a tetrafunctional glycidylamine epoxy (TGDDM).