标題: Understanding oxygen-deficient La2CuO4-delta perovskite activated peroxymonosulfate for bisphenol A degradation: The role of localized electron within oxygen vacancy

作者: Chen, HX (Chen, Hanxiao); Xu, Y (Xu, Yin); Zhu, KM (Zhu, Kangmeng); Zhang, H (Zhang, Hui)

來源出版物: APPLIED CATALYSIS B-ENVIRONMENTAL  卷: 284  文獻号: 119732  DOI: 10.1016/j.apcatb.2020.119732  出版年: MAY 5 2021  

摘要: An A(2)BO(4)-type oxygen-deficient perovskite (La2CuO4-delta, LCO), which owns a better low-temperature reducibility, more abundant oxygen vacancies (OVs) and surface oxygen species than the benchmark CuO oxide, was first applied in peroxymonosulfate (PMS) activation. At 0.7 g/L of LCO and 2 mM of PMS, more than 96 % of bisphenol A (BPA) was removed within 60 mM over a wide pH range of 3.1 - 9.1. The cycle of surface Cu(II)/Cu (I) redox couple and lattice oxygen (O2-)/O-2 were responsible for PMS activation. Besides, the OVs with localized electrons may directly activate PMS through single electron transfer pathway to generate surface-bound hydroxyl radical (center dot OH) and sulfate radical (SO4 center dot-), as well as less singlet oxygen (O-1(2)) for BPA degradation. The evolution of center dot OH, SO4 center dot and O-1(2) were revealed by EPR tests. Briefly, this study provides the mechanistic understanding of A(2)BO(4)-type perovskite in activation of PMS for water treatment.

入藏号: WOS:000623588500003

語言: English

文獻類型: Article

作者關鍵詞: Bisphenol A; Oxygen vacancies; Perovskite; Peroxymonosulfate; Reaction mechanism

地址: [Chen, Hanxiao; Xu, Yin; Zhu, Kangmeng; Zhang, Hui] Wuhan Univ, Hubei Environm Remediat Mat Engn Technol Res Ctr, Dept Environm Sci & Engn, Wuhan 430079, Peoples R China.

[Xu, Yin] Hubei Univ, Sch Resources & Environm Sci, Wuhan 430062, Peoples R China.

通訊作者地址: Xu, Y; Zhang, H (通訊作者)，Wuhan Univ, Hubei Environm Remediat Mat Engn Technol Res Ctr, Dept Environm Sci & Engn, Wuhan 430079, Peoples R China.

電子郵件地址: yxu1101@163.com; eeng@whu.edu.cn

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