Photocatalytic Hydrogen Peroxide Production with Bi₂WO₆/g-C₃N₄ Heterojunction Through S-Scheme Charge Transfer

Authors

• Zihan Mao, College of Pharmacy, Dali University, Dali 671000, Yunnan, China
• Xuan Ran, Yunnan Jingke Environmental Monitoring Co., Ltd., Dali 671000, Yunnan, China
• Shu Lin, College of Pharmacy, Dali University, Dali 671000, Yunnan, ChinaFollow
• Kezhen Qi, College of Pharmacy, Dali University, Dali 671000, Yunnan, ChinaFollow

Abstract

We synthesized Bi2WO6 via a hydrothermal approach and subsequently fabricated a Bi2WO6/g-C3N4 heterojunction through grinding process. The resulting composite demonstrated an impressive photocatalytic production rate of hydrogen peroxide at 4809.5 μ mol g-1 h-1, which is nearly double that of CN and 18 times greater than that of BWO. The photocatalytic effectiveness of the BWO/CN composite was thoroughly investigated under different conditions and environmental factors. This enhancement can be primarily attributed to the efficient separation and migration of photogenerated charge carrier pairs facilitated by the S-scheme heterojunction, along with improved redox capability. Photoluminescence spectroscopy and electrochemical impedance spectroscopy (EIS) were utilized to verify the improved efficiency of charge separation. Furthermore, based on X-ray photoelectron spectroscopy (XPS) and electron paramagnetic resonance (EPR) analyses, in conjunction with band structure calculations, the underlying mechanism of hydrogen peroxide generation and the key factors contributing to the enhanced photocatalytic performance were elucidated.

Recommended Citation

Mao, Zihan; Ran, Xuan; Lin, Shu; and Qi, Kezhen (2026) Photocatalytic Hydrogen Peroxide Production with Bi₂WO₆/g-C₃N₄ Heterojunction Through S-Scheme Charge Transfer, Sultan Qaboos University Journal For Science: Vol. 31: Iss. 2, 87-99.
DOI: https://doi.org/10.53539/2414-536X.1431
Available at: https://squjs.squ.edu.om/squjs/vol31/iss2/1