磷钨酸
苯甲醇
异质结
光催化
氧化还原
光化学
材料科学
化学
电子受体
化学工程
催化作用
无机化学
光电子学
有机化学
工程类
作者
Weikang Wang,Shaobin Mei,Shahid Ali Khan,Yujue Hu,Lijuan Sun,Guoliang Yuan,Cheng-Zhang Zhu,Lele Wang,Qinqin Liu
标识
DOI:10.1002/cssc.202400575
摘要
Simultaneous utilization of photogenerated electrons and holes to achieve overall redox reactions is attractive but still far from practical application. The emerging step (S)‐scheme mechanism has proven to be an ideal approach to inhibit charge recombination and supply photoinduced charges with highest redox potentials. Herein, a hierarchical phosphotungstic acid (H3PW12O40, HPW)@Znln2S4 (ZISW) heterojunction was prepared through one‐pot hydrothermal method for simultaneous hydrogen (H2) evolution and benzyl alcohol upgrading. The fabricated HPW‐based heterojunctions indicated much enhanced visible‐light absorption, promoted photogenerated charge transfer and inhibited charge recombination, owing to hierarchical architecture based on visible‐light responsive Znln2S4 microspheres, and S‐scheme charge transfer pathway. The S‐scheme mechanism was further investigated by free‐radical trapping electron spin resonance (ESR) spectra. Moreover, the wettability of composite heterojunction was improved by the modification of hydrophilic HPW, contributing to gaining active hydrogen (H+) from water sustainably. The optimal ZISW‐30 heterojunction photocatalyst indicated an enhanced hydrogen evolution rate of 27.59 mmol g–1 h–1 in benzyl alcohol (10 vol.%) solution under full‐spectrum irradiation, along with highest benzaldehyde production rate is 8.32 mmol g–1 h–1. This work provides a promising guideline for incorporating HPW into S‐scheme heterojunctions to achieve efficient overall redox reactions.
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