LiFePO4改善无机/有机S型光催化剂的过氧化氢光合作用

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Abstract：With the rapid development new energy industries， the utilization waste batteries has attracted the attention researchers. Developing a hydrogen peroxide photosynthesis system with battery recyclingmaterialsas photocatalysts presentsa significant challenge. In this study，an ultrasonic self-assembly technique is employed to integrate LiFePO4 （LFPO） nanoparticles，derived from spent batteries， with g-C3N4 （CN） nanosheets， thereby creating an inorganic/organic Sscheme photocatalyst for the production H2O2 . Insituanalyses using X-ray photoelectron spectroscopy （XPS）andKelvin probe force microscopy （KPFM） demonstrate that the interaction between LFPO and CNfaciatesthedevelopmentan internal electricfield （IEF），which inturn givesrisetoadistinctive S-scheme chargetransfer mechanism. Combining electron spin resonance spectroscopy，radical-trapping experiments，and in situ DRIFTS spectra， three pathways for H2O2 formation are identified. Benefited from enhanced carrier separation， strong redox power，and multichannel H2O2 formation， the optimal composite shows an impressive H2O2 -productionrate 3.22 mol⋅g-1⋅h-1 under simulated solar irradiation.This research provides a potential method to investigate a sustainable H2O2 photosynthesis pathway by designing S-scheme heterojunctions from spent battery materials.

Key Words：Photocatalysis; H2O2 production; Inorganic/organic heterojunction；Battery-based catalyst; S-scheme mechanism

关键词：光催化； H2O2 生产；无机/有机异质结；电池基催化剂；S型机理中图分类号：0643

1引言

过氧化氢 （H2O2） 因其高商业价值、优异的体积能量密度及无污染反应过程，在化学合成、燃料电池、废水处理、造纸工业和消毒工艺等多个领域受到广泛关注[1-4]。（剩余17836字）