Preparation of an Excellent Z‐type SrWO4@Bi2WO6 Heterojunction Photocatalyst and Its Photocatalytic Performance under Simulated Sunlight

Abstract In this work, a simple chemical co‐precipitation method was employed to prepare a series of excellent Z‐type SrWO 4 @Bi 2 WO 6 (SWO@BWO) heterojunction composites, in which SrWO 4 was successfully assembled on Bi 2 WO 6 nanosheets. The outstanding separation efficiency of photo‐generated carriers (e − /h + ) originated from synergetic effect of semiconductor heterojunctions under simulated sunlight effectively improved photocatalytic activity, resulting in a more prominent performance for organic dyestuff degradation compared with its counterparts. Based on the photocatalytic degradation of Methylene blue (MB) experiment, coming to a conclusion is that 10wt %SWO@BWO composite (η=92.9 % for 50 min) has the prominent photocatalytic activity. The photocatalytic performance of 10wt %SWO@BWO composite is 6.36 and 2.6 times as high as that of bare SWO and BWO, respectively. This composite also has better degradation performance for Tetracycline Hydrochloride (TC) and Tetrabromobisphenol A (TBBPA). According to the active species capture experiment, . OH are dominant in the degradation process of MB, and role of h + and . O 2 − is also indispensable. Our research provides a simple approach for establishing Z‐scheme heterojunction photocatalysts with great photocatalytic performance.