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Highly Efficient Photocatalytic HO Production under Ambient Conditions via Defective InS Nanosheets.
Langmuir
January 2025
State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China.
Oxygen and water generating hydrogen peroxide (HO) by optical drive is an extremely promising pathway, and the large amount of oxygen in air and natural sunlight illumination are excellent catalytic conditions. However, the separation efficiency of photogenerated electron-hole pairs greatly limits the photocatalytic efficiency, especially in the absence of sacrificial agents. Here, we report an InS nanosheet with an S vacancy (S-InS).
View Article and Find Full Text PDFEnhancing photocatalytic hydrogen evolution of carbon nitride through high-valent cobalt active sites in cobalt sulfide co-catalyst.
J Colloid Interface Sci
December 2024
School of Materials Science & Engineering, School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, PR China; Zotye Automobile Co., Ltd, Jinhua 321399, PR China. Electronic address:
Article Synopsis
- Photocatalytic hydrogen production using solar energy is an effective solution for energy and environmental issues, but inefficiencies arise from the rapid recombination of charges in semiconductor catalysts.
- Researchers used a co-catalyst loading strategy, specifically incorporating cobalt sulfide (CoS) onto bulk carbon nitride (BCN), to enhance photocatalytic performance for hydrogen production.
- The optimal CoS-BCN composite (with 15% CoS) showed a performance improvement of 156 times compared to BCN alone, as CoS nanoparticles facilitate electron transfer and reduce charge recombination, enhancing hydrogen evolution efficiency.
Noble-Metal-Free Cocatalysts Reinforcing Hole Consumption for Photocatalytic Hydrogen Evolution with Ultrahigh Apparent Quantum Efficiency.
Adv Mater
December 2024
College of Physics and Center of Quantum Materials and Devices, Chongqing University, Chongqing, 401331, China.
Achieving efficient and sustainable hydrogen production through photocatalysis is highly promising yet remains a significant challenge, especially when replacing costly noble metals with more abundant alternatives. Conversion efficiency with noble-metal-free alternatives is frequently limited by high charge recombination rates, mainly due to the sluggish transfer and inefficient consumption of photo-generated holes. To address these challenges, a rational design of noble-metal-free cocatalysts as oxidative sites is reported to facilitate hole consumption, leading to markedly increased H yield rates without relying on expensive noble metals.
View Article and Find Full Text PDFDiacetylene-bridged covalent organic framework as crystalline graphdiyne analogue for photocatalytic hydrogen evolution.
Chem Sci
December 2024
School of Chemical Engineering and Light Industry, Guangdong University of Technology Guangzhou 510006 China
Graphdiyne (GDY) alone as a photocatalyst is unsatisfactory because of its low crystallinity, limited regulation of the band gap, weak photogenerated charge separation, , and heterojunctioning with other materials is necessary to activate the photocatalytic activity of GDY. Through elaborate design, a diacetylene-rich linker (S2) was prepared and employed to construct a crystalline and structurally well-defined GDY-like covalent organic framework (COF, namely S2-TP COF) which merges the merits of both COF and GDY to boost the photocatalytic hydrogen evolution reaction (HER). By theoretical prediction on the donor-acceptor (D-A) pair, two other monoacetylene-bridged COFs (S1-TP COF and S3-TP COF) were prepared for comparison.
View Article and Find Full Text PDFGraphdiyne based ZnCdS and NiO dual S-scheme heterojunction boosting photocatalytic hydrogen evolution.
J Colloid Interface Sci
December 2024
School of Chemistry and Chemical Engineering, Ningxia Key Laboratory of Solar Chemical Conversion Technology, Key Laboratory for Chemical Engineering and Technology, State Ethnic Affairs Commission, North Minzu University, Yinchuan 750021, PR China. Electronic address:
As a novel carbon-based material with two-dimensional (2D) characteristics, graphdiyne (GDY) shows great potential in constructing active catalytic sites due to its distinctive atomic configuration and sp/sp conjugated hybrid two-dimensional networks. In this study, the layered GDY was synthesized using the ball milling method, and ZnCdS/Graphdiyne/NiO (ZnCdS/GDY/NiO) composite was synthesized by in-situ composite and physical mixing method. The prepared ZnCdS/GDY/NiO has good photostability outstanding performance in photocatalytic hydrogen production.
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