A Z-scheme ZnIn2S4/ZnS heterojunction catalyst: insight into enhanced photocatalytic performance and mechanism

被引：14

作者：

Liu, Shuaishuai ^{[1
]}

Mao, Yuchen ^{[1
]}

Su, Zhiyuan ^{[1
]}

Fang, Fan ^{[1
]}

Li, Kun ^{[1
]}

Wu, Yuhan ^{[1
]}

Liu, Puyu ^{[1
]}

Li, Peng ^{[1
]}

Chang, Kun ^{[1
]}

机构：

[1] Nanjing Univ Aeronaut & Astronaut, Coll Mat Sci & Technol, Ctr Hydrogenergy, Nanjing 210016, Peoples R China

来源：

CATALYSIS SCIENCE & TECHNOLOGY | 2023年 / 13卷 / 11期

基金：

中国国家自然科学基金;

关键词：

HIGHLY EFFICIENT; FOSSIL ENERGY; WATER; CONSTRUCTION;

D O I：

10.1039/d3cy00298e

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The reasonable design of a highly efficient photocatalyst to improve its hydrogen production performance has attracted extensive attention. In this work, ZnIn2S4/ZnS (ZIS/ZnS) heterojunctions were constructed through a one-step solvothermal method, which ensures a good microscopic relationship between different phases and keeps their interfaces in close contact. The optimized ZIS/ZnS catalyst exhibited exceptionally enhanced photocatalytic activity under simulated AM 1.5G irradiation, and the maximum hydrogen evolution rate reached 464.1 mu mol h(-1), which was 16.2 and 7.3 times higher than that of pure ZnS and ZIS, respectively. Photo/electrochemical analyses proved that the ZIS/ZnS heterojunction has high charge separation efficiency and a strong redox ability. A Z-scheme electron transfer mechanism was proposed to explain the dramatic increase in photocatalytic activity which was based on photodeposition experiments. In addition, the catalyst also showed excellent hydrogen evolution activity under visible light irradiation (lambda > 420 nm). We explored the charge transfer mechanism in detail under different light conditions, employing in situ XPS and photo-deposition experiments.

引用

页码：3351 / 3357

页数：7

共 56 条

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