钛酸铋/氮化碳无机/有机复合S型异质结纯水光催化产过氧化氢

doi:10.3866/PKU.WHXB202403009

Abstract

Abstract:

Hydrogen peroxide (H₂O₂) plays a significant role as an industrial chemical and potential energy carrier. However, common H₂O₂ photosynthesis catalysts face challenges such as limited solar spectrum absorption, severe agglomeration, and difficulty in reuse, hindering their widespread application. In this study, an inorganic/organic heterojunction photocatalyst comprising g-C₃N₄ nanosheets and Bi₄Ti₃O₁₂ nanofibers is synthesized using electrospinning assisted self-assembly methods. The Bi₄Ti₃O₁₂/g-C₃N₄ heterojunction exhibits significantly enhanced H₂O₂ yield of 1650 μmol∙g⁻¹∙h⁻¹ and efficient H₂O₂ photosynthesis directly from pure water. The improved performance is attributed to enhanced visible light absorption, charge separation efficiency, and boosting redox properties of photoinduced carriers in S-scheme heterojunctions. Additionally, the utilization of in situ X-ray photoelectron spectroscopy (ISXPS) enables the investigation of the S-scheme mechanism and dynamics of inorganic/organic Bi₄Ti₃O₁₂/g-C₃N₄ heterojunctions. This research presents a novel approach for designing inorganic/organic heterojunction photocatalysts for solar-driven H₂O₂ production.

Key words: Heterojunction, Photocatalysis, Hydrogen peroxide production, S-scheme mechanism

Ke Li, Chuang Liu, Jingping Li, Guohong Wang, Kai Wang. Architecting Inorganic/Organic S-Scheme Heterojunction of Bi₄Ti₃O₁₂ Coupling with g-C₃N₄ for Photocatalytic H₂O₂ Production from Pure Water[J]. Acta Phys. -Chim. Sin. 2024, 40(11), 2403009. doi: 10.3866/PKU.WHXB202403009

Figures/Tables 7

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Architecting Inorganic/Organic S-Scheme Heterojunction of Bi₄Ti₃O₁₂ Coupling with g-C₃N₄ for Photocatalytic H₂O₂ Production from Pure Water

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