Fabrication of SiW9Co3/CdIn2S4 heterojunction with boosted photocatalytic performance for H2 generation and Cr(VI) reduction

IF 8.1 2区工程技术 Q1 CHEMISTRY, PHYSICAL

International Journal of Hydrogen Energy Pub Date : 2025-04-27 DOI:10.1016/j.ijhydene.2025.04.330

Chengxin Chen , Hongfei Shi , Ao Rong , Meijie Wei , Xiang Zhou , Bo Feng , Weidong Wang

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Abstract

Developing effective photocatalysts with an enhanced light-harvesting ability and a high charge carrier separation efficiency is a crucial step in the photocatalytic technology for solving energy crisis and reducing environmental pollution. Herein, a series of K₁₀[SiW₉Co₃(H₂O)₃O₃₇]/CdIn₂S₄ (abbr. x % SiW₉Co₃/CIS; x % represents the quality ratio for SiW₉Co₃:CIS, x = 30, 40, 50, 60 and 70) heterojunctions were prepared successfully with a simple hydrothermal method. The compositions, morphologies, catalytic performance and photoelectrochemical properties of the obtained samples were well examined. These SiW₉Co₃/CIS samples demonstrated outstanding visible-light (λ ≥ 420 nm) catalytic performance toward hydrogen generation and Cr(VI) removal with outstanding cycling durability and stability. Particularly, 50 % SiW₉Co₃/CIS had the supreme photocatalytic properties with the hydrogen evolution rate of 783.8 μmol/g·h (AQE = 4.58 %; λ = 420 nm) and the Cr(VI) reduction rate constant of 0.0625 min⁻¹. which was 3.78 and 8.8 folds that of bare CIS (0.0165 min⁻¹) and SiW₉Co₃ (0.0071 min⁻¹), respectively. The boosted catalytic capability could be assigned to the improvement of the number of active sites, the visible light absorption, and the separation efficiency of photogenerated carriers. The current work offers new perspectives for designing and constructing POMs/semiconductor photocatalytic system with effective catalytic property for Cr(VI) removal and hydrogen evolution.

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SiW9Co3/CdIn2S4异质结的制备及其对H2生成和Cr（VI）还原的光催化性能

开发集光能力强、载流子分离效率高的光催化剂是光催化技术解决能源危机、减少环境污染的关键一步。本文采用K10[SiW9Co3(H2O)3O37]/CdIn2S4(缩写x % SiW9Co3/CIS；x %表示SiW9Co3:CIS的质量比，x = 30,40,50,60和70)用简单的水热法成功制备了异质结。对所得样品的组成、形貌、催化性能和光电化学性能进行了测试。这些SiW9Co3/CIS样品在可见光（λ≥420 nm）下具有出色的催化产氢和去除Cr（VI）的性能，并且具有出色的循环耐久性和稳定性。其中，50% SiW9Co3/CIS具有最高的光催化性能，析氢速率为783.8 μmol/g·h (AQE = 4.58%；λ = 420 nm), Cr（VI）还原速率常数为0.0625 min−1。分别是裸CIS （0.0165 min−1）和SiW9Co3 （0.0071 min−1）的3.78倍和8.8倍。催化性能的提高可以归因于活性位点数量的增加、可见光吸收和光生载体分离效率的提高。本研究为设计和构建具有高效脱除Cr（VI）和析氢催化性能的POMs/半导体光催化体系提供了新的思路。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

International Journal of Hydrogen Energy 工程技术-环境科学

CiteScore

13.50

自引率

25.00%

发文量

3502

审稿时长

60 days

期刊介绍： The objective of the International Journal of Hydrogen Energy is to facilitate the exchange of new ideas, technological advancements, and research findings in the field of Hydrogen Energy among scientists and engineers worldwide. This journal showcases original research, both analytical and experimental, covering various aspects of Hydrogen Energy. These include production, storage, transmission, utilization, enabling technologies, environmental impact, economic considerations, and global perspectives on hydrogen and its carriers such as NH3, CH4, alcohols, etc. The utilization aspect encompasses various methods such as thermochemical (combustion), photochemical, electrochemical (fuel cells), and nuclear conversion of hydrogen, hydrogen isotopes, and hydrogen carriers into thermal, mechanical, and electrical energies. The applications of these energies can be found in transportation (including aerospace), industrial, commercial, and residential sectors.