CeO2/Bi19Br3S27 S型异质结的高效界面电荷转移用于增强光催化CO2还原

doi:10.1016/j.actphy.2025.100065

物理化学学报 >> 2025, Vol. 41 >> Issue (6): 100065.doi: 10.1016/j.actphy.2025.100065

所属专题：光催化中的S型异质结

CeO₂/Bi₁₉Br₃S₂₇ S型异质结的高效界面电荷转移用于增强光催化CO₂还原

李朋¹, 崔元映¹^,², 王中辽¹, DawsonGraham³, 邵春风¹^,*(), 代凯¹^,*()

¹ 淮北师范大学物理与电子信息学院, 安徽省污染敏感材料与环境修复重点实验室, 安徽淮北 235000
² 桂林电子科技大学, 广西信息材料重点实验室, 桂林 541004
³ 西安交通利物浦大学化学系, 江苏苏州 215123

收稿日期:2025-01-14 修回日期:2025-02-13 录用日期:2025-02-13 发布日期:2025-04-19
通讯作者: Email: shaocf@chnu.edu.cn (邵春风)daikai940@chnu.edu.cn (代凯)
基金资助:
国家自然科学基金(22278169); 安徽省教育厅优秀科研创新团队(2022AH010028); 安徽省质量工程项目(2022sx134)

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 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)

摘要/Abstract

摘要：

提高光生载流子的分离效率，进而显著增强光催化剂的氧化还原能力是光催化领域中的一个重大挑战。为了解决这一问题，本文通过水热法成功合成了CeO₂/Bi₁₉Br₃S₂₇ S型异质结催化剂，旨在提升催化剂的光催化性能。CeO₂/Bi₁₉Br₃S₂₇复合材料的合成不仅改善了光生载流子的分离效率，还赋予了催化剂更强的氧化还原能力和更大的驱动力，显著提升了其光催化表现。实验结果表明，CeO₂/Bi₁₉Br₃S₂₇复合催化剂在CO生成方面的产率达到了13.5 μmol g⁻¹ h⁻¹，远高于单一Bi₁₉Br₃S₂₇和CeO₂催化剂的产率，分别是单独Bi₁₉Br₃S₂₇和CeO₂催化剂的5.19倍和2.81倍。这一显著的提升表明，CeO₂/Bi₁₉Br₃S₂₇复合催化剂的光催化性能在CO生成反应中展现出了更强的催化能力。此外，CeO₂/Bi₁₉Br₃S₂₇催化剂在CH₄生成方面的产率为4.3 μmol g⁻¹ h⁻¹，较单独CeO₂催化剂高出3.1倍，较单独Bi₁₉Br₃S₂₇催化剂高出2.7倍，进一步证明了其在CH₄生成反应中的优越表现。这些结果表明，CeO₂/Bi₁₉Br₃S₂₇复合催化剂不仅在CO和CH₄生成速率方面表现出显著的提升，而且其优异的光催化性能表明其在光催化领域中的应用潜力。本研究为改进光生电荷分离效率提供了新的思路，并为未来开发高效光催化材料提供了有价值的参考。通过构建S型异质结结构，可以有效地抑制光生载流子的复合，提高光催化反应的效率，从而为可持续能源的利用提供了新的解决方案。

关键词: 光催化二氧化碳还原, S型异质结, CeO₂, Bi₁₉Br₃S₂₇, 内置电场

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

李朋, 崔元映, 王中辽, DawsonGraham, 邵春风, 代凯. CeO₂/Bi₁₉Br₃S₂₇ S型异质结的高效界面电荷转移用于增强光催化CO₂还原[J]. 物理化学学报, 2025, 41(6), 100065. doi: 10.1016/j.actphy.2025.100065

Peng Li, Yuanying Cui, Zhongliao Wang, Graham Dawson, Chunfeng Shao, Kai Dai. Efficient interfacial charge transfer of CeO₂/Bi₁₉Br₃S₂₇ S-scheme heterojunction for boosted photocatalytic CO₂ reduction[J]. Acta Phys. -Chim. Sin. 2025, 41(6), 100065. doi: 10.1016/j.actphy.2025.100065

链接本文: https://www.whxb.pku.edu.cn/CN/10.1016/j.actphy.2025.100065

https://www.whxb.pku.edu.cn/CN/Y2025/V41/I6/100065

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CeO₂/Bi₁₉Br₃S₂₇ S型异质结的高效界面电荷转移用于增强光催化CO₂还原

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

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