物理化学学报 >> 2024, Vol. 40 >> Issue (11): 2406020.doi: 10.3866/PKU.WHXB202406020

所属专题: 太阳燃料制备

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用于高效制氢的双S型ZnS/ZnO/CdS异质结构光催化剂

RazaAsif Hassan, FarhanShumail, 余志贤, 吴艳*()   

  1. 中国地质大学(武汉)材料科学与化学学院, 武汉 430078
  • 收稿日期:2024-06-17 修回日期:2024-07-24 录用日期:2024-07-29 发布日期:2024-10-14
  • 通讯作者: Email: wuyan@cug.edu.cn; Tel: +86-13517286716 (吴艳)
  • 基金资助:
    国家自然科学基金(22378372); 中国政府奖学金支持

Double S-Scheme ZnS/ZnO/CdS Heterostructure Photocatalyst for Efficient Hydrogen Production

Asif Hassan Raza, Shumail Farhan, Zhixian Yu, Yan Wu*()   

  1. Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430078, China
  • Received:2024-06-17 Revised:2024-07-24 Accepted:2024-07-29 Published:2024-10-14
  • Contact: Email: wuyan@cug.edu.cn; Tel: +86-13517286716 (Yan Wu)
  • Supported by:
    the National Natural Science Foundation of China(22378372); Chinese Government Scholarship

摘要:

这项工作展示了一种新型具有高效光催化活性的双S型ZnS/ZnO/CdS三元异质结光催化剂。具有最佳CdS组成的ZnS/ZnO/CdS三元催化剂,ZnS/ZnO/CdS-14%显示最大H2析出速率为4.1 mmol·g‒1·h‒1。最大光催化性能分别约是相应的ZnS/CdS和ZnO/ZnS的2倍和13倍。在420 nm下,获得了19.8%的量子效率。此外,连续6次测试后,催化剂的结构和产氢活性只有微小的变化,表明了光催化剂的稳定性。根据理论计算和实验结果,三元光催化活性的显著提高归因于快速的电子转移和分离,以及相互作用的双S型半导体界面之间的紧密接触。这项工作强调了一种构建双S型光催化系统的新方法,该分解水产氢系统对光生载流子具有高效分离和快速迁移能力。

关键词: 双S型光催化剂, 内部电场, 析氢, 三元异质结

Abstract:

This work illustrates the novelty of double S-scheme ZnS/ZnO/CdS ternary heterojunction photocatalyst with efficient photocatalytic activity. The sample with optimal CdS content, ZnS/ZnO/CdS-14% (ZZC14%), displayed the maximum H2 evolution rate of 4.1 mmol·g‒1·h‒1. The maximum photocatalytic performance was approximately 2 and 13 times higher than their corresponding counterparts, ZnS/CdS and ZnO/ZnS, respectively. A high AQE of 19.8% under 420 nm was obtained. Additionally, the slight changes in H2 evolution activities and retentions of crystal structures after six successive cycles indicate the stability of the photocatalyst. In accordance with the theoretical calculations and experimental results, the remarkable enhancement in photocatalytic activity is attributed to fast electron transfer and separation as well as the intimate contact due to mutual interaction between S-scheme. This work highlights an innovative approach to constructing a dual S-scheme photocatalytic system with high separation and fast migration capabilities of photogenerated charge carriers for splitting water to produce hydrogen.

Key words: Double S-scheme photocatalyst, Internal electric field, Hydrogen evolution, Ternary heterojunction