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LiFePO4改善无机/有机S型光催化剂的过氧化氢光合作用

李静萍 ,  严素定 ,  吴佳曦 ,  程强 ,  王楷

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引用本文: 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): 100104. doi: 10.1016/j.actphy.2025.100104 shu
Citation:  Jingping Li, Suding Yan, Jiaxi Wu, Qiang Cheng, Kai Wang. Improving hydrogen peroxide photosynthesis over inorganic/organic S-scheme photocatalyst with LiFePO4[J]. Acta Physico-Chimica Sinica, 2025, 41(9): 100104. doi: 10.1016/j.actphy.2025.100104 shu

LiFePO4改善无机/有机S型光催化剂的过氧化氢光合作用

  • 湖北师范大学城市与环境学院, 黄石市土壤污染防治重点实验室, 湖北 黄石 435002

    • 通讯作者: 严素定, yansd@hbnu.edu.cn; 王楷, wangkai@hbnu.edu.cn
  • 基金项目:

    国家自然科学基金 22378104

    湖北省自然科学基金 2025AFA093

    湖北省自然科学基金 2022CFB504

    湖北省优秀青年科技创新团队 T2023021

摘要: 随着新能源产业的快速发展，废旧电池的利用引起了研究者的关注。开发以电池回收材料作为光催化剂的过氧化氢光合系统是一项重大挑战。本研究采用超声自组装技术，将电池材料磷酸铁锂(LFPO)纳米颗粒与石墨相氮化碳(CN)纳米片复合，构建了用于生产H2O2的无机/有机S型光催化剂。通过X射线光电子能谱(XPS)和开尔文探针力显微镜(KPFM)的原位分析表明，LFPO与CN之间的相互作用促进了内建电场(IEF)的形成，进而产生独特的S型电荷转移机制。结合电子自旋共振光谱、自由基捕获实验和原位漫反射红外傅里叶变换光谱，确定了H2O2生成的三种途径。得益于增强的载流子分离、强氧化还原能力和多通道H2O2形成机制，最优复合材料在模拟太阳光照射下表现出3.22 mol∙g−1∙h−1的优异H2O2产率。该研究通过从废电池材料中设计S型异质结，为研究可持续的H2O2光合作用途径提供了一种潜在的方法。

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