Construction of WO3@In2S3 heterojunction and its photocatalytic performance for NO removal

In this study, WO3@In2S3 composite photocatalysts were designed and synthesized. It was proved that the composite In2S3 enhanced the light-harvesting ability of the catalyst and promoted the separation and migration of photoexcited electron-hole pair. The constructed heterojunction formed a photocatalytic synergistic effect with the oxygen vacancies in WO3, which overcame the decreased activity of single WO3 for NO removal. The sample loaded with 10 % In2S3 exhibited the best photocatalytic activity, with three times the catalytic removal rate of pure WO3 in the NO removal test. Besides, it also showed good stability in NO cycling test. The effectiveness of the WO3@10 %In2S3 heterostructure construction strategy has been successfully demonstrated, which could provide reference for the construction of WO3 heterostructure.