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In2O3/Bi19Br3S27 S-scheme heterojunction with enhanced photocatalytic CO2 reduction

In2O3/Bi19Br3S27S型异质结增强光催化CO2还原

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Abstract

In recent years, semiconductor catalysts have attracted lots of attention due to their substantial redox capability and adequate stability. However, many semiconductor catalysts have difficulties in realizing real word applications because of the high complexation and low oxidizing ability of photogenerated electron-holes. In-depth investigation has revealed that the S-scheme heterojunction possesses a unique mechanism of carrier movement, resulting in a robust redox capacity and strong driving force. Herein, we synthesized an In2O3/Bi19Br3S27 step-scheme (S-scheme) heterojunction through the hydrothermal method comprised of Bi19Br3S27 nanoflowers grown on In2O3 nanospheres. This configuration effectively facilitates the separation and transfer of photogenerated charge carriers. As a result, the reduction yield of CO2 by In2O3/Bi19Br3S27 composite reaches 28.36 µmol h−1 g−1, which is 19 times higher than that of In2O3 and 3.5 times higher than that of Bi19Br3S27. Furthermore, the intermediates involved in the photocatalytic reaction were examined through in situ diffuse reflectance infrared Fourier transform spectroscopy, revealing the reaction process of photocatalytic reduction of CO2. This work offers a concept on the method of constructing S-scheme heterojunction photocatalysts to enhance the catalyzed reduction of CO2.

摘要

近年来, 半导体催化剂因其较强的氧化还原能力和较好的稳定性而受到广泛关注. 然而, 光生电子和空穴对易复合和低氧化性导致单一半导体催化剂难以实现实际应用. 深入研究表明, S型异质结具有独特的电子和空穴分离机理、强大的氧化还原能力和较强的载流子分离驱动力. 本研究以在In2O3纳米球上生长的Bi19Br3S27纳米花为原料, 采用水热法合成了In2O3/Bi19Br3S27梯形异质结. 这种梯形异质结有效地促进了光生电荷载流子的分离和转移. 结果表明, In2O3/Bi19Br3S27复合材料对CO2的还原产率高达28.36 μmol h−1g−1, 分别是In2O3和Bi19Br3S27的19和3.5倍. 此外, 通过原位漫反射红外傅里叶变换光谱对参与光催化反应的中间体进行了研究, 揭示了光催化还原CO2的反应过程. 本工作为构建S型异质结光催化剂增强CO2催化还原的方法提供了较好的研究思路.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (22278169 and 51973078), the Excellent Scientific Research and Innovation Team of Education Department of Anhui Province (2022AH010028), the major projects of Education Department of Anhui Province (2022AH040068), and Anhui Provincial Quality Engineering Project (2022sx134).

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  1. These authors contributed equally to this work.

Authors and Affiliations

  1. Laboratory of Green and Precise Synthetic Chemistry and Applications, Ministry of Education, Anhui Province Key Laboratory of Pollutant Sensitive Materials and Environmental Remediation, Anhui Province Key Laboratory of Intelligent Computing and Applications, Anhui Province Industrial Generic Technology Research Center for Alumics Materials, Huaibei Normal University, Huaibei, 235000, China

    Yuqin Bian  (卞玉琴), Houwei He  (何厚伟), Jinfeng Zhang  (张金锋) & Kai Dai  (代凯)

  2. Department of Chemistry, Xi’an Jiaotong Liverpool University, Suzhou, 215123, China

    Graham Dawson & Kai Dai  (代凯)

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  1. Yuqin Bian  (卞玉琴)
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  2. Houwei He  (何厚伟)
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  3. Graham Dawson
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  4. Jinfeng Zhang  (张金锋)
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Contributions

Author contributions Bian Y wrote the paper. He H participated in the writing. Dawson G and Zhang J gave some valuable suggestions on the revision. Dai K reviewed the manuscript and finalized the final version. All authors contributed to the general discussion.

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Correspondence to Jinfeng Zhang  (张金锋) or Kai Dai  (代凯).

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Additional information

Yuqin Bian is currently pursuing an MS degree at the School of Materials Science and Engineering, Huaibei Normal University. Her research mainly focuses on semiconductor photocatalysis.

Jinfeng Zhang received his MS degree from Ningxia University in 2007, and PhD degree from Wuhan University of Technology in 2016. He carried out postdoctoral research at Wuhan University of Technology from 2016 to 2018. Since the end of 2007, he has been working at Huaibei Normal University. His research interests mainly focus on semiconductor photocatalysis.

Kai Dai is a professor at Huaibei Normal University. He received PhD degree from Shanghai University in 2007. He joined at Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences in 2007, and then moved to Huaibei Normal University in 2010. His research interests mainly focus on energy conversion and storage.

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Bian, Y., He, H., Dawson, G. et al. In2O3/Bi19Br3S27 S-scheme heterojunction with enhanced photocatalytic CO2 reduction. Sci. China Mater. 67, 514–523 (2024). https://doi.org/10.1007/s40843-023-2725-y

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  • DOI: https://doi.org/10.1007/s40843-023-2725-y

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