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Spent LiFePO4: An old but vigorous peroxymonosulfate activator for degradation of organic pollutants in water

文献类型： 外文期刊

作者： Wang, Pu 1 ; Lou, Xiaoyi 2 ; Chen, Qianqian 1 ; Liu, Yujing 1 ; Sun, Xiaohu 1 ; Guo, Yaoguang 1 ; Zhang, Xiaojiao 1 ; Wang, Ruixue 1 ; Wang, Zhaohui 3 ; Chen, Shuai 1 ; Zhang, Li 1 ; Zhang, Rui-Qin 6 ; Guan, Jie 1 ;

作者机构： 1.Shanghai Polytech Univ, Shanghai Collaborat Innovat Ctr WEEE Recycling, Sch Resources & Environm Engn, Shanghai 201209, Peoples R China

2.Chinese Acad Fishery Sci, East Sea Fisheries Res Inst, Lab Qual Safety & Proc Aquat Prod, Shanghai 200090, Peoples R China

3.East China Normal Univ, Sch Ecol & Environm Sci, Shanghai Key Lab Urban Ecol Proc & Ecorestorat, Shanghai 200241, Peoples R China

4.Minist Nat Resources, Technol Innovat Ctr Land Spatial Ecorestorat Metro, 3663 N Zhongshan Rd, Shanghai 200062, Peoples R China

5.Shanghai Engn Res Ctr Biotransformat Organ Solid W, Shanghai 200241, Peoples R China

6.City Univ Hong Kong, Dept Phys, Hong Kong 999077, Peoples R China

关键词： Advanced oxidation processes; Peroxymonosulfate; Catalysis; Hydroxyl radical; Quantum chemical calculations

期刊名称：ENVIRONMENTAL RESEARCH （ 影响因子：8.431； 五年影响因子：8.399 ）

ISSN： 0013-9351

年卷期： 2022 年 214 卷

页码：

收录情况： SCI

摘要： Iron-based catalysts have been demonstrated to activate peroxymonosulfate (PMS) to generate reactive radicals, which is however limited by their complex preparation process, high costs and inefficiency for practical appli-cations. Herein we obtain spent LiFePO4 (SLFP), with powerful catalytic capacity by a simple one-step treatment of the retired LiFePO4 cathode material, for PMS activation to decontaminate organic pollutants. Lithium defects and oxygen vacancies in SLFP play critical roles for PMS utilization, further confirmed by density functional theory (DFT) calculations. SLFP materials rapidly adsorb PMS, and the surface PMS is activated by Fe(II) to generate radicals, with (OH)-O-center dot playing a major role for the degradation of organics after multi-step reactions. The SLFP/PMS process is finally validated for ability to remove organic contaminants and potential environmental application.

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