Acta Phys. -Chim. Sin. ›› 2025, Vol. 41 ›› Issue (6): 100065.doi: 10.1016/j.actphy.2025.100065

Special Issue: S-scheme heterojunction in photocatalysis

• ARTICLE • Previous Articles     Next Articles

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

Peng Li1, Yuanying Cui1,2, Zhongliao Wang1, Graham Dawson3, Chunfeng Shao1,*(), Kai Dai1,*()   

  1. 1 Anhui Province Key Laboratory of Pollutant Sensitive Materials and Environmental Remediation, School of Physics and Electronic Information, Huaibei Normal University, Huaibei 235000, Anhui Province, China
    2 Guangxi Key Laboratory of Information Materials, Guilin University of Electronic Technology, Guilin 541004, Guangxi Zhuang Autonomous Region, China
    3 Department of Chemistry, Xi'an Jiaotong Liverpool University, Suzhou 215123, Jiangsu Province, China
  • Received:2025-01-14 Revised:2025-02-13 Accepted:2025-02-13 Published:2025-04-19
  • Contact: Email: shaocf@chnu.edu.cn (Chunfeng Shao)daikai940@chnu.edu.cn (Kai Dai)
  • Supported by:
    the National Natural Science Foundation of China(22278169); the Excellent Scientific Research and Innovation Team of Education Department of Anhui Province(2022AH010028); Anhui Provincial Quality Engineering Project(2022sx134)

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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.

Key words: Photocatalytic carbon dioxide reduction, S-scheme heterojunction, CeO2, Bi19Br3S27, Built-in electric field