Spent rather than pristine LiFePO4 cathode materials can catalytically activate sulfite for organic pollutants decontamination

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Pu Wang
  • Xiaoyi Lou
  • Xiaohu Sun
  • Qianqian Chen
  • Yujing Liu
  • Yaoguang Guo
  • Xiaojiao Zhang
  • Jie Guan
  • Ruixue Wang
  • Zhaohui Wang
  • Weixing Gu

Related Research Unit(s)

Detail(s)

Original languageEnglish
Article number137123
Journal / PublicationChemical Engineering Journal
Volume446
Issue numberPart 1
Online published21 May 2022
Publication statusOnline published - 21 May 2022

Abstract

Lab-prepared Fe-bearing materials have demonstrated their ability to activate sulfite (S(IV)) to generate reactive radicals, which is however limited by their costs and inefficiencies for practical application. Here we report that spent LiFePO4 (SLFP) cathode materials can function as a robust catalyst for S(IV) activation and consequent decontamination of organic pollutants like 4,4′-sulfonyldiphenol (BPS). Unexpectedly, SLFP materials with lithium defects and oxygen vacancies (Ov) are significantly effective than pristine LiFePO4. BPS degradation undergoes an induction period when rapid adsorption of O2 and HSO3 in water occurs, followed by a slow release of HSO5, as evidenced by the same depletion trends of BPS and sulfite, and confirmed by theoretical calculations. The HSO5 is activated by Fe(II) on the SLFP surface, with OH being the main reactive species via a multi-step reaction. The potential environmental application of this SLFP/S(IV) process are evaluated ultimately.

Research Area(s)

  • Catalysis, Hydroxyl radical, Quantum chemical calculations, Spent power battery, Sulfite

Citation Format(s)

Spent rather than pristine LiFePO4 cathode materials can catalytically activate sulfite for organic pollutants decontamination. / Wang, Pu; Lou, Xiaoyi; Sun, Xiaohu; Chen, Qianqian; Liu, Yujing; Guo, Yaoguang; Zhang, Xiaojiao; Guan, Jie; Wang, Ruixue; Zhang, Rui-Qin; Wang, Zhaohui; Gu, Weixing.

In: Chemical Engineering Journal, Vol. 446, No. Part 1, 137123, 15.10.2022.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review