光催化
材料科学
异质结
制氢
纳米棒
单斜晶系
光致发光
分解水
催化作用
量子效率
带隙
化学工程
氢
光催化分解水
光化学
纳米技术
光电子学
化学
晶体结构
结晶学
有机化学
工程类
作者
Xuanpu Wang,Zhiliang Jin,Xin Li
出处
期刊:Rare Metals
[Springer Nature]
日期:2023-02-02
卷期号:42 (5): 1494-1507
被引量:180
标识
DOI:10.1007/s12598-022-02183-y
摘要
Abstract Improving the separation of photogenerated carriers and suppressing the rapid complication of electron–hole pairs are essential ways to improve photocatalytic hydrogen production activity. The high recombination rate of the photogenerated carriers is an issue encountered when developing CdS as a promising photocatalytic material. This work allowed to accelerate the separation of photogenerated electrons and holes by loading monoclinic β‐AgVO 3 on hexagonal CdS nanorods to construct a one‐dimensional (1D)/1D p‐n heterojunction. The introduction of monoclinic β‐AgVO 3 with a narrow band gap effectively improves the light absorption of CdS, which is conducive to improving the use of visible light. The integrated electric field of the p–n heterojunction can effectively transfer electrons and holes in the direction suitable to hydrogen evolution. The photoluminescence and electrochemical characterization of the catalysts showed that the p–n heterojunction formed after loading β‐AgVO 3 greatly improved the separation efficiency of photocarriers. The hydrogen evolution experiments show that the composite catalyst has good photocatalytic hydrogen evolution capability and stability. The composite catalyst with the best photocatalytic performance was obtained by studying β‐AgVO 3 with different loadings. The composite catalyst reached 581.5 μmol of hydrogen amount within 5 h, which is 3.8 times higher than that of CdS alone and its apparent quantum efficiency reaches 8.02%. The present work provides a possible solution for the development of perovskite and the extensiveness of CdS in photocatalytic hydrogen evolution.
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