Efficient extraction of uranium from seawater by reticular polyamidoxime-functionalized oriented holocellulose bundles

Carbohydrate Polymers, Journal Year: 2022, Volume and Issue: 300, P. 120244 - 120244

Published: Oct. 20, 2022

Language: Английский

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Tweaking Photo CO₂ Reduction by Altering Lewis Acidic Sites in Metalated‐Porous Organic Polymer for Adjustable H₂/CO Ratio in Syngas Production

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(50)

Published: Oct. 24, 2023

Herein, we have specifically designed two metalated porous organic polymers (Zn-POP and Co-POP) for syngas (CO+H2 ) production from gaseous CO2 . The variable H2 /CO ratio of with the highest efficiency was produced in water medium (without an hole scavenger photosensitizer) by utilizing basic principle Lewis acid/base chemistry. Also, observed formation entirely different major products during photocatalytic reduction splitting help catalysts, where CO (145.65 μmol g-1 h-1 (434.7 were preferentially obtained over Co-POP & Zn-POP, respectively. higher electron density/better nature investigated further using XPS, XANES, NH3 -TPD studies, which considerably improve activation capacity. Moreover, structure-activity relationship confirmed via situ DRIFTS DFT demonstrated COOH* intermediate along thermodynamic feasibility while occurred Zn-POP.

Language: Английский

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Curvature effect on graphene-based Co/Ni single-atom catalysts

Applied Surface Science, Journal Year: 2023, Volume and Issue: 615, P. 156357 - 156357

Published: Jan. 9, 2023

Language: Английский

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Photocatalytic reforming of lignocellulose: A review

Chemical Engineering Journal, Journal Year: 2023, Volume and Issue: 469, P. 143972 - 143972

Published: June 10, 2023

Biomass has been considered as a promising energy resource to combat the exhaustion of fossil fuels, it is renewable, sustainable, and clean. Photocatalytic reforming novel technology utilize solar for upgrading biomass in relatively mild conditions. This process efficiently reforms recasts into hydrogen and/or valuable chemicals. To date, lignocellulose, including cellulose, hemicellulose lignin, attracted extensive studies facile photocatalytic valorisation. review summarizes analyzes most recent research advances on photoreforming lignocellulose provide insights future research, with particular emphasis reformation lignin because its 3D complex stubborn structure. The structure contains dominant linkage, i.e., β-O-4. breakage β-O-4 linkage can be proceeded by two steps, e.g., oxidization reduction, according sequence photoexcited holes electrons. Thus, this discusses two-step integrate step dissociation strategies along rationally chosen photocatalysts. challenges photocatalysts, solvent, post-treatment were identified, potential solutions these provided.

Language: Английский

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Microwave Synthesis of Pt Clusters on Black TiO₂ with Abundant Oxygen Vacancies for Efficient Acidic Electrocatalytic Hydrogen Evolution

Angewandte Chemie, Journal Year: 2023, Volume and Issue: 135(14)

Published: Feb. 9, 2023

Abstract Oxygen vacancies‐enriched black TiO 2 is one promising support for enhancing hydrogen evolution reaction (HER). Herein, oxygen vacancies enriched supported sub‐nanometer Pt clusters (Pt/TiO ‐O V ) with metal interactions designed through solvent‐free microwave and following low‐temperature electroless approach the first time. High‐temperature strong reductants are not required then can avoid aggregation of decorated species. Experimental theoretical calculation verify that created exhibit synergistic effects optimizing kinetics. Based on it, Pt/TiO presents remarkable electrocatalytic performance 18 mV to achieve 10 mA cm −2 coupled small Tafel slope 12 dec −1 . This work provides quick synthetic strategy preparing titanium dioxide based nanomaterials.

Language: Английский

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Tuning the surface hydrophilicity of a C3N4 nanosheet for efficient photocatalytic H2 evolution coupled with microplastic degradation

International Journal of Hydrogen Energy, Journal Year: 2023, Volume and Issue: 48(71), P. 27599 - 27610

Published: April 17, 2023

Language: Английский

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Photocatalytic CO2 reduction integrated with biomass selective oxidation via single-atom Ru and P dual sites on carbon nitride

Applied Catalysis B Environment and Energy, Journal Year: 2023, Volume and Issue: 342, P. 123429 - 123429

Published: Oct. 23, 2023

Language: Английский

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Photoreduction of Aqueous Protons Coupling with Alcohol Oxidation on a S‐Scheme Heterojunction Photocatalyst MnO/Carbon Nitride

Small, Journal Year: 2023, Volume and Issue: 20(12)

Published: Nov. 6, 2023

Abstract Crystalline carbon nitride (CCN), derived from amorphous polymeric CN, is considered as a new generation of metal‐free photocatalyst because its high crystallinity. In order to further promote the photocatalytic performance CCN, p‐type MnO nanoparticles are in situ synthesized and merged with n‐type CCN through one‐pot process form p–n heterojunction. The formed interfacial electric field between semiconductors different work functions efficiently breaks coulomb interaction CCN. prepared catalysts exhibit drastically increased hydrogen evolution (PHE) activity integrated oxidation alkyl aryl alcohols under irradiation visible light. aqueous solution benzyl alcohol (BzOH), rate over MnO/CCN (39.58 µmol h −1 ) nearly 7 times 37 that pure (5.76 CN (1.06 ), respectively, combining BzOH benzaldehyde. This proposes an avenue for construction novel 2D material‐based S‐scheme heterojunction extends application solar energy conservation utilization.

Language: Английский

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Innovative lignin photocatalyst system motivated by intramolecular charge dynamics for H2O2 production

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 494, P. 153151 - 153151

Published: June 15, 2024

Language: Английский

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Photoreforming of lignocellulose into hydrogen

Deleted Journal, Journal Year: 2024, Volume and Issue: unknown, P. 100047 - 100047

Published: Jan. 1, 2024

<p>The naturally plentiful, clean, and sustainable biomass resource has the ability to partially replace limited supply of fossil fuels as a feedstock for long-term, production high-value chemicals fuels. Meantime, straightforward, gentle, ecologically friendly photocatalytic technique seems be novel line inquiry conversion lignocellulose into hydrogen other In this perspective, photoreforming H₂ including their fundamentals, some typical examples, significant scientific discussion are rigorously examined.</p>

Language: Английский

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