Interfacial construction of P25/Bi2WO6 composites for selective CO2 photoreduction to CO in gas–solid reactions

Liu, Daohan; Zeng, Minli; Li, Zhen; Zhu, Zhiqi; Chen, Yu; Thummavichai, Kunyapat; Ola, Oluwafunmilola; Wang, Nannan; Zhu, Yanqiu

Abstract

Photocatalysis provides an attractive approach to convert CO2 into valuable fuels, which relies on a well-designed photocatalyst with good selectivity and high CO2 reduction ability. Herein, a series of P25/Bi2WO6 nanocomposites were synthesized by a simple one-step in situ hydrothermal method. The formation of a heterojunction between Bi2WO6, which absorbs visible light, and P25, which absorbs ultraviolet light, expands the utilization of sunlight by the catalysts, and consequently, leads to a remarkably enhanced CO2 selective photoreduction to CO. The maximum CO yield of the P25/Bi2WO6 heterojunction under simulated solar irradiation was 15.815 μmol g−1 h−1, which was 4.04 and 2.80 times higher than that of pure P25 and Bi2WO6, respectively. Our investigations verified a Z-scheme charge migration mechanism based on various characterization techniques between P25 and Bi2WO6. Furthermore, in situ DRIFTS uncovered the related reaction intermediates and CO2 photoreduction mechanism. Our work sheds light on investigating the efficacious construction of Bi2WO6-based hybrids for light-driven photocatalysis.

Citation

Liu, D., Zeng, M., Li, Z., Zhu, Z., Chen, Y., Thummavichai, K., Ola, O., Wang, N., & Zhu, Y. (2023). Interfacial construction of P25/Bi2WO6 composites for selective CO2 photoreduction to CO in gas–solid reactions. RSC Advances, 13(13), 8564-8576. https://doi.org/10.1039/d3ra00418j

• Journal Article Type: Article
• Acceptance Date: Feb 23, 2023
• Online Publication Date: Mar 14, 2023
• Publication Date: Mar 14, 2023
• Deposit Date: Mar 25, 2023
• Publicly Available Date: Mar 28, 2023
• Journal: RSC Advances
• Electronic ISSN: 2046-2069
• Publisher: Royal Society of Chemistry
• Peer Reviewed: Peer Reviewed
• Volume: 13
• Issue: 13
• Pages: 8564-8576
• DOI: https://doi.org/10.1039/d3ra00418j
• Keywords: General Chemical Engineering; General Chemistry
• Public URL: https://nottingham-repository.worktribe.com/output/18805498
• Publisher URL: https://pubs.rsc.org/en/content/articlelanding/2023/RA/D3RA00418J