In situ-illuminated XPS Investigation of S-Scheme Inorganic/Organic Hybrid Nanofiber Photocatalysts for Efficient CO2 Photoreduction

doi:10.1007/s40242-025-5126-5

Chemical Research in Chinese Universities ›› 2026, Vol. 42 ›› Issue (1): 343-350.doi: 10.1007/s40242-025-5126-5

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In situ-illuminated XPS Investigation of S-Scheme Inorganic/Organic Hybrid Nanofiber Photocatalysts for Efficient CO₂ Photoreduction

WANG Zicong, LI Xi, LIU Yunlong, WU Xiangsi, WU Xianwen, XIA Wu

School of Chemistry and Chemical Engineering, Jishou University, Jishou 416000, P. R. China

Received:2025-06-10 Online:2026-02-01 Published:2026-01-28
Contact: WU Xiangsi,E-mail:xswu2015@163.com;XIA Wu,E-mail:chemxw_2008@163.com E-mail:xswu2015@163.com;chemxw_2008@163.com
Supported by:
This work was supported by the National Natural Science Foundation of China (Nos. 52462034, 52464030), the Natural Science Foundation of Hunan Province, China (Nos. 2024JJ7398, 2024JJ7407), the Outstanding Youth Foundation of Hunan Provincial Education Department, China (Nos. 23B0527, 23B0503), the Outstanding Youth Funding Program of Hunan Province, China (No. 2023JJ10033), the Scientific Research Start-up Funding of Jishou University, China (No. 28), and the Aid Program for Science and Technology Innovative Research Team in Higher Educational Institutions of Hunan Province, China.

Abstract

Abstract: The photocatalytic reduction of CO₂ for the production of solar fuels without sacrificing agents is an environmentally friendly and important process, with the development of high-performance photocatalysts being a key focus. An inorganic/organic semiconducting pair with an S-scheme mechanism has been incorporated in a hybrid fiber morphology designed specifically for an S-scheme heterojunction. Specifically, polydopamine (PDA) nanoparticles were synthesized within the walls of TiO₂ nanofibers through in situ self-polymerization of dopamine hydrochloride. The TiO₂@PDA composite photocatalyst with 1.0% PDA decoration exhibited the highest CO yield of 19.15 μmol·h^-1·g^-1, which was 2.6 times greater that of pure TiO₂ (7.25 μmol·h^-1·g^-1). Combining PDA and TiO₂ nanofibers arranged in an S-scheme heterojunction can be attributed to the improved light absorption and the effective charge carrier separation and transfer. Consequently, this research introduces a novel approach for developing inorganic/organic S-scheme heterojunctions with a fiber morphology to enhance CO₂ photoreduction efficiency.

Key words: TiO₂ nanofiber, Polydopamine, Photocatalytic CO₂ reduction, S-Scheme mechanism, Solar fuel

WANG Zicong, LI Xi, LIU Yunlong, WU Xiangsi, WU Xianwen, XIA Wu. In situ-illuminated XPS Investigation of S-Scheme Inorganic/Organic Hybrid Nanofiber Photocatalysts for Efficient CO₂ Photoreduction[J]. Chemical Research in Chinese Universities, 2026, 42(1): 343-350.

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In situ-illuminated XPS Investigation of S-Scheme Inorganic/Organic Hybrid Nanofiber Photocatalysts for Efficient CO₂ Photoreduction

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