物理化学学报2025，Vol.41Issue(9)：109-118,10.DOI:10.1016/j.actphy.2025.100104
LiFePO4改善无机/有机S型光催化剂的过氧化氢光合作用
Improving hydrogen peroxide photosynthesis over inorganic/organic S-scheme photocatalyst with LiFePO4
摘要
Abstract
With the rapid development of new energy industries,the utilization of waste batteries has attracted the attention of researchers.Developing a hydrogen peroxide photosynthesis system with battery recycling materials as photocatalysts presents a 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 S-scheme photocatalyst for the production of H2O2.In situ analyses using X-ray photoelectron spectroscopy(XPS)and Kelvin probe force microscopy(KPFM)demonstrate that the interaction between LFPO and CN facilitates the development of an internal electric field(IEF),which in turn gives rise to a distinctive S-scheme charge transfer 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-production rate of 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.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Key words
Photocatalysis/H2O2 production/Inorganic/organic heterojunction/Battery-based catalyst/S-scheme mechanism分类
化学化工引用本文复制引用
李静萍,严素定,吴佳曦,程强,王楷..LiFePO4改善无机/有机S型光催化剂的过氧化氢光合作用[J].物理化学学报,2025,41(9):109-118,10.基金项目
The project was supported by the National Natural Science Foundation of China(22378104)and Hubei Provincial Natural Science Foundation of China(2025AFA093 and 2022CFB504)and Outstanding Youth Science and Technology Innovation Team in Hubei Province(T2023021). 国家自然科学基金(22378104),湖北省自然科学基金(2025AFA093,2022CFB504)以及湖北省优秀青年科技创新团队(T2023021)资助 （22378104）
