Effect of Co-catalyst CdS on the Photocatalytic Performance of ZnMoO4 for Hydrogen Production

IF 2.1 4区化学 Q3 CHEMISTRY, PHYSICAL

Catalysis Surveys from Asia Pub Date : 2022-03-18 DOI:10.1007/s10563-022-09357-9

Ming Zheng, Bing Gao, Suwen Tang, Min Zhu, Liang Tang, Minghong Wu

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引用次数: 2

Abstract

Zinc molybdate (ZnMoO₄), a layer perovskite material, has the advantages of high stability, excellent optical and charge properties. However, its high band gap and high electron–hole recombination efficiency limit its application in the photocatalytic reduction field like hydrogen production. In this study, we used CdS as a co-catalyst and successfully prepared CdS/ZnMoO₄ composite photocatalysts with different loadings. The hydrogen evolution rate of CdS/ZnMoO₄ reached 530.2 µmol h⁻¹ g⁻¹, which was approximately 11 and 100 times more than rates of pure CdS and ZnMoO₄ under the same conditions, respectively. It is the presence of CdS that contributed to this improved performance, which acted as an electron acceptor to separate electrons and holes. Besides, a reasonable mechanism was provided based on photoelectrochemical characterizations. CdS loading greatly improved the hydrogen evolution performance of ZnMoO₄ under visible light, providing a direction to improving the performance of perovskite based photocatalysts.

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助催化剂CdS对ZnMoO4制氢光催化性能的影响

钼酸锌(ZnMoO4)是一种层状钙钛矿材料，具有稳定性高、光学性能和电荷性能优异等优点。但其高带隙和高电子空穴复合效率限制了其在制氢等光催化还原领域的应用。在本研究中，我们以CdS为助催化剂，成功制备了不同负载的CdS/ZnMoO4复合光催化剂。cd /ZnMoO4的析氢速率达到530.2µmol h−1 g−1，分别是纯cd和ZnMoO4的11倍和100倍。cd的存在有助于提高性能，它作为电子受体将电子和空穴分开。并基于光电化学表征给出了合理的机理。加载CdS大大提高了ZnMoO4在可见光下的析氢性能，为提高钙钛矿基光催化剂的性能提供了方向。

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来源期刊

Catalysis Surveys from Asia 化学-物理化学

CiteScore

4.80

自引率

0.00%

发文量

审稿时长

>12 weeks

期刊介绍： Early dissemination of important findings from Asia which may lead to new concepts in catalyst design is the main aim of this journal. Rapid, invited, short reviews and perspectives from academia and industry will constitute the major part of Catalysis Surveys from Asia . Surveys of recent progress and activities in catalytic science and technology and related areas in Asia will be covered regularly as well. We would appreciate critical comments from colleagues throughout the world about articles in Catalysis Surveys from Asia . If requested and thought appropriate, the comments will be included in the journal. We will be very happy if this journal stimulates global communication between scientists and engineers in the world of catalysis.