光催化
热液循环
异质结
材料科学
化学工程
纳米颗粒
分解水
纳米技术
光电子学
化学
催化作用
生物化学
工程类
作者
Quanpeng Wang,Guohong Wang,Juan Wang,Jinmao Li,Kai Wang,Shuang Zhou,Yaorong Su
标识
DOI:10.1002/adsu.202200027
摘要
Abstract Photocatalysts with step‐scheme (S‐scheme) heterojunctions exhibit huge potential in hydrogen evolution via photocatalytic water splitting, which is regarded as a promising technology to solve the energy crisis and environmental issues. In this work, S‐scheme heterojunction photocatalysts are constructed by in situ depositing ZnS nanoparticles on TiO 2 nanofibers via hydrothermal method. A highly improved photocatalytic H 2 evolution rate is achieved for the ZnS/TiO 2 heterojunction as compared to the mono‐component ZnS and TiO 2 . Remarkably, the TiO 2 /ZnS‐5 (TZ‐5) sample possesses the highest H 2 evolution rate of 5503.8 µmol g ‐1 h ‐1 , which is 4.8 times of ZnS and 38.8 times of TiO 2 , respectively. The observed photocatalytic performance improvement is mainly attributed to the construction of an S‐scheme heterojunction, which results in the fast separation of the photogenerated e − –h + pairs and enhanced redox capacity of the system. This work may provide inspirations and designing references for developing high‐performance S‐scheme heterojunction photocatalysts.
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