Li Shuqi, Peng Shaoqin, Li Yuexiang
College of Chemistry and Chemical Engineering, Key Laboratory of Jiangxi Province for Environment and Energy Catalysis, Nanchang University, Nanchang 330031, P. R. China.
J Phys Chem Lett. 2024 May 16;15(19):5215-5222. doi: 10.1021/acs.jpclett.4c00835. Epub 2024 May 8.
Constructing heterojunctions to separate photogenerated carriers is an effective strategy for improving the efficiency of photocatalytic reactions. A J-type heterojunction is a recently reported efficient anisotropic heterojunction. Herein, taking anisotropic ZnInS (ZIS) nanosheets as an example of a type-II heterojunction, we report for the first time the concept of open and closed structures (O and C structure) of J-type heterojunctions. A simple ammonia-post-treatment method was employed to prepare the O- and C-structured J-type ZnInS/In(OH) (ZIS/IOH) heterojunctions. The O-structured J-type ZIS/IOH (OJ-ZIS/IOH) heterojunction exhibits a high hydrogen production activity, reaching 400 μmol·h, 2.67 times higher than that of pristine ZIS. However, the activity of the C-structured heterojunction (CJ-ZIS/IOH) is close to that of pristine ZIS. The findings emphasize the importance of the cooperation of photogenerated carrier separation and transport in J-type heterojunctions, providing insights into developing efficient heterojunction photocatalysts.
