磷钨酸
苯甲醇
异质结
比例(比率)
材料科学
化学
纳米技术
化学工程
催化作用
物理
光电子学
有机化学
量子力学
工程类
作者
Weikang Wang,Shaobin Mei,Shahid Ali Khan,Yujue Hu,Lijuan Sun,Muhammad Adnan Qaiser,Chengzhang Zhu,Lele Wang,Qinqin Liu
出处
期刊:Chemsuschem
[Wiley]
日期:2024-04-23
卷期号:17 (19): e202400575-e202400575
被引量:11
标识
DOI:10.1002/cssc.202400575
摘要
Abstract 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 (H 3 PW 12 O 40 , HPW)@Znln 2 S 4 (ZISW) heterojunction was prepared through one‐pot hydrothermal method for simultaneous hydrogen (H 2 ) 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 Znln 2 S 4 microspheres, and S‐scheme charge transfer pathway. The S‐scheme mechanism was further verified 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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