Efficient interfacial charge transfer of CeO2/Bi19Br3S27 S-scheme heterojunction for boosted photocatalytic CO2 reduction

IF 10.8 2区 化学 Q1 CHEMISTRY, PHYSICAL
Peng Li , Yuanying Cui , Zhongliao Wang , Graham Dawson , Chunfeng Shao , Kai Dai
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引用次数: 0

Abstract

Improving the separation efficiency of photogenerated charge carriers to significantly enhance the redox capability of photocatalysts remains a major challenge in the field of photocatalysis. To address this issue, this study successfully synthesized a CeO2/Bi19Br3S27 S-scheme heterojunction catalyst using a hydrothermal method, aiming to enhance the photocatalytic performance of the catalyst. The synthesis of the CeO2/Bi19Br3S27 composite not only improved the separation efficiency of photogenerated charge carriers but also endowed the catalyst with stronger redox capabilities and greater driving force, significantly boosting its photocatalytic performance. Experimental results showed that the CO production rate of the CeO2/Bi19Br3S27 composite catalyst reached 13.5 ​μmol ​g−1 ​h−1, which is 5.19 times higher than that of the pure Bi19Br3S27 catalyst and 2.81 times higher than that of the pure CeO2 catalyst. This significant enhancement indicates that the CeO2/Bi19Br3S27 composite catalyst exhibited stronger catalytic performance in CO generation reactions. Furthermore, CeO2/Bi19Br3S27 catalyst achieved a CH4 production rate of 4.3 ​μmol ​g−1 ​h−1, which is 3.1 times higher than that of the CeO2 catalyst and 2.7 times higher than that of the Bi19Br3S27 catalyst, further confirming its superior performance in CH4 generation reactions. These results demonstrate that the CeO2/Bi19Br3S27 composite catalyst not only shows significant improvements in CO and CH4 production rates but also exhibits excellent photocatalytic performance, highlighting its potential application in the field of photocatalysis. This study provides new insights into improving the separation efficiency of photogenerated charges and offers valuable references for the future development of highly efficient photocatalytic materials. By constructing the S-scheme heterojunction structure, the recombination of photogenerated charge carriers can be effectively suppressed, thereby enhancing the efficiency of photocatalytic reactions and providing a new solution for sustainable energy utilization.

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来源期刊
物理化学学报
物理化学学报 化学-物理化学
CiteScore
16.60
自引率
5.50%
发文量
9754
审稿时长
1.2 months
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