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标题: A novel S-scheme heterojunction in spent battery-derived ZnFe2O4/g-C3N4 photocatalyst for enhancing peroxymonosulfate activation and visible light degradation of organic pollutant

作者: Tang, HL (Tang, Huiling); Li, RM (Li, Ruimeng); Fan, XH (Fan, Xiaohui); Xu, Y (Xu, Yin); Lin, H (Lin, Heng); Zhang, H (Zhang, Hui)

来源出版物: JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING 卷: 10 期: 3 文献号: 107797 DOI: 10.1016/j.jece.2022.107797 出版年: JUN 2022

摘要: Waste resource recovery and water pollution control are two important issues in environmental protection. In this study, ZnFe2O4 prepared from spent alkaline Zn-Mn battery was combined with g-C3N4 (CN) to form ZnFe2O4/g-C3N4 (ZFO-CN) step-scheme (S-scheme) heterojunction photocatalyst to eliminate bisphenol A (BPA) in the presence of peroxymonosulfate (PMS) under visible light (Vis, lambda >= 400 nm). Results revealed that the ZFO-CN possessed an outstanding photocatalytic performance, which was attributed to the superior visible light harvest capacity and unique S-scheme charge transfer pathway as evidenced by X-ray photoelectron spectroscopy and electrochemical test. Reactive species including SO4 center dot-, (OH)-O-center dot, O-center dot(2)-, O-1(2) and h(+) co-existed in the system, among which the non-radicals including O-1(2) and h(+) were inferred to be the predominant oxidation species based on the result of chemical quenching experiments. The effects of catalyst dosage, PMS concentration, initial pH and inorganic ion (HCO3-, Cl-, H2PO4-, NO3- or NH4+) on BPA removal were investigated. At 0.3 g L-1 ZFO-CN-0.5, 0.5 mM PMS and 60 min reaction time, more than 97.7% BPA was decomposed under visible light irradiation over a wide pH range of 3.5-9.0. This work provides a promising approach of constructing spent battery-derived spinel oxides into a high-efficiency heterojunction photocatalyst to activate PMS for practical wastewater treatment.

作者关键词: ZnEe(2)O(4)/g-C3N4 S-scheme heterojunction; Visible light; Spent battery; Peroxymonosulfate; Bisphenol A

地址: [Tang, Huiling; Li, Ruimeng; Fan, Xiaohui; Xu, Yin; Zhang, Hui] Wuhan Univ, Sch Resource & Environm Sci, Dept Environm Sci & Engn, Hubei Biomass Resource Chem & Environm Biotechnol, Wuhan 430079, Peoples R China.

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

[Lin, Heng] Wuhan Univ, Zhong Nan Hosp, Dept Cardiothorac Surg, Wuhan 430060, Peoples R China.

通讯作者地址: Xu, Y; Zhang, H (通讯作者)，Wuhan Univ, Sch Resource & Environm Sci, Dept Environm Sci & Engn, Hubei Biomass Resource Chem & Environm Biotechnol, Wuhan 430079, Peoples R China.

Lin, H (通讯作者)，Wuhan Univ, Zhong Nan Hosp, Dept Cardiothorac Surg, Wuhan 430060, Peoples R China.

电子邮件地址: yxu1101@163.com; lheng2005@163.com; eeng@whu.edu.cn

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