BiOCl/BiOBr composites for efficient photocatalytic carbon dioxide reduction

BiOBr (BOB) photocatalysts have low photocatalytic CO 2 reduction performance due to their low electron -hole pair separation efficiency. To improve this problem, BiOCl (BOCl) is used as a co -catalyst. BOCl is loaded into BOB to form BiOCl/BiOBr (BOCl/BOB) type I heterojunction, which enhances the photocatalytic CO 2 reduction performance of BOB by promoting the separation of photogenerated electrons and holes. The results of TPR and PL experiments show that the 20% BOCl/BOB composites have the highest photogenerated carrier separation rate, and the results of CO 2 reduction experiments show that 20% BOCl/BOB composites have the best photocatalytic CO 2 reduction performance of 7.353 mu molg - 1 h - 1 , which is 3.22 and 1.99 times higher than pure BOB and BOCl, respectively. This work provides an effective reference for the development of modified photocatalysts.