Abstract
• Successfully constructed WO 3 @In 2 S 3 heterojunction. • Enhanced photocatalytic removal efficiency of WO 3 for NO. • The constructed heterojunction improved the stability of NO removal by WO 3 . In this study, WO 3 @In 2 S 3 composite photocatalysts were designed and synthesized. It was proved that the composite In 2 S 3 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 WO 3 , which overcame the decreased activity of single WO 3 for NO removal. The sample loaded with 10 % In 2 S 3 exhibited the best photocatalytic activity, with three times the catalytic removal rate of pure WO 3 in the NO removal test. Besides, it also showed good stability in NO cycling test. The effectiveness of the WO 3 @10 %In 2 S 3 heterostructure construction strategy has been successfully demonstrated, which could provide reference for the construction of WO 3 heterostructure.
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