Efficient CO2 Photoreduction into Solar Fuels over MoO3-x/COF S-Scheme Photocatalyst

doi:10.1007/s40242-025-5033-9

高等学校化学研究 ›› 2025, Vol. 41 ›› Issue (4): 726-733.doi: 10.1007/s40242-025-5033-9

Efficient CO₂ Photoreduction into Solar Fuels over MoO_3-x/COF S-Scheme Photocatalyst

LIU Chuang, GAO Tengyuan, WANG Guohong, CHENG Qiang, WANG Kai

Hubei Key Laboratory of Pollutant Analysis and Reuse Technology, Huangshi Key Laboratory of Prevention and Control of Soil Pollution, Hubei Normal University, Huangshi 435002, P. R. China

收稿日期:2025-02-27 接受日期:2025-03-24 出版日期:2025-08-01 发布日期:2025-07-24
通讯作者: WANG Guohong,Wanggh@hbnu.edu.cn;WANG Kai,wangkai@hbnu.edu.cn E-mail:Wanggh@hbnu.edu.cn;wangkai@hbnu.edu.cn
基金资助:
This work was supported by the National Natural Science Foundation of China (No. 22378104), the Project of the Outstanding Youth Science and Technology Innovation Team in Hubei Province, China (No. T2023021), and the Research Project of the Hubei Provincial Department of Education, China (No. D20232502).

Efficient CO₂ Photoreduction into Solar Fuels over MoO_3-x/COF S-Scheme Photocatalyst

LIU Chuang, GAO Tengyuan, WANG Guohong, CHENG Qiang, WANG Kai

Hubei Key Laboratory of Pollutant Analysis and Reuse Technology, Huangshi Key Laboratory of Prevention and Control of Soil Pollution, Hubei Normal University, Huangshi 435002, P. R. China

Received:2025-02-27 Accepted:2025-03-24 Online:2025-08-01 Published:2025-07-24
Supported by:
This work was supported by the National Natural Science Foundation of China (No. 22378104), the Project of the Outstanding Youth Science and Technology Innovation Team in Hubei Province, China (No. T2023021), and the Research Project of the Hubei Provincial Department of Education, China (No. D20232502).

摘要/Abstract

摘要： The restricted electron transport and slow surface reaction kinetics are two fundamental limitations affecting the photocatalytic efficiency of covalent organic frameworks (COFs). To address these challenges and enhance charge separation, this study utilizes an in-situ growth strategy to incorporate MoO_3-x into COF (denoted as BTTA), forming MoO_3-x/COF composites (MOCOF). These composites demonstrate significantly enhanced solar fuel performance through photocatalytic CO₂ reduction. In-situ irradiated X-ray photoelectron spectroscopy and electron spin resonance analyses confirm the presence of an S-scheme carrier transfer mechanism, which effectively spatially separates photogenerated carriers with substantial redox potential. The nanoarchitecture of MOCOF-2 demonstrates the capability to efficiently convert CO₂ into valuable CO and CH₄ fuels, achieving reduction rates of 8.7 and 4.6 μmol∙g^-1∙h^-1, respectively. This study provides a valuable reference for the rational design of COF-based S-scheme heterojunction photocatalysts aimed at solar fuel production.

关键词: Covalent organic framework, S-Scheme heterojunction, Photocatalysis, Solar fuel, Interfacial engineering

Abstract: The restricted electron transport and slow surface reaction kinetics are two fundamental limitations affecting the photocatalytic efficiency of covalent organic frameworks (COFs). To address these challenges and enhance charge separation, this study utilizes an in-situ growth strategy to incorporate MoO_3-x into COF (denoted as BTTA), forming MoO_3-x/COF composites (MOCOF). These composites demonstrate significantly enhanced solar fuel performance through photocatalytic CO₂ reduction. In-situ irradiated X-ray photoelectron spectroscopy and electron spin resonance analyses confirm the presence of an S-scheme carrier transfer mechanism, which effectively spatially separates photogenerated carriers with substantial redox potential. The nanoarchitecture of MOCOF-2 demonstrates the capability to efficiently convert CO₂ into valuable CO and CH₄ fuels, achieving reduction rates of 8.7 and 4.6 μmol∙g^-1∙h^-1, respectively. This study provides a valuable reference for the rational design of COF-based S-scheme heterojunction photocatalysts aimed at solar fuel production.

Key words: Covalent organic framework, S-Scheme heterojunction, Photocatalysis, Solar fuel, Interfacial engineering

LIU Chuang, GAO Tengyuan, WANG Guohong, CHENG Qiang, WANG Kai. Efficient CO₂ Photoreduction into Solar Fuels over MoO_3-x/COF S-Scheme Photocatalyst[J]. 高等学校化学研究, 2025, 41(4): 726-733.

LIU Chuang, GAO Tengyuan, WANG Guohong, CHENG Qiang, WANG Kai. Efficient CO₂ Photoreduction into Solar Fuels over MoO_3-x/COF S-Scheme Photocatalyst[J]. Chemical Research in Chinese Universities, 2025, 41(4): 726-733.

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Efficient CO₂ Photoreduction into Solar Fuels over MoO_3-x/COF S-Scheme Photocatalyst

Efficient CO₂ Photoreduction into Solar Fuels over MoO_3-x/COF S-Scheme Photocatalyst

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