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Visible-light-driven photocatalytic activation of peroxymonosulfate by Cu2(OH)PO4 for effective decontamination.
Chemosphere. 2018 Jun; 201:197-205.C

Abstract

The advanced oxidation process (AOP) based on SO4- radicals draws an increasing interest in water and wastewater treatment. Producing SO4- radicals from the activation of peroxymonosulfate (PMS) by transition metal ions or oxides may be problematic due to high operational cost and potential secondary pollution caused by metal leaching. To address this challenge, the present study reports the efficient production of SO4- radicals through visible-light-driven photocatalytic activation (VL-PCA) of PMS by using Cu2(OH)PO4 single crystal for enhanced degradation of a typical recalcitrant organic pollutant, i.e., 2,4-dichlorophenol (2,4-DCP). It took only 7 min to achieve almost 100% removal of 2,4-DCP in the Cu2(OH)PO4/PMS system under visible-light irradiation and pH-neutral condition. The 2,4-DCP degradation was positively correlated to the amount of Cu2(OH)PO4 and PMS. Both OH and SO4- radicals were responsible for enhanced degradation performance, indicated by radical scavenger experiments and electron spin resonance (ESR) measurements. The Cu2(OH)PO4 single crystal exhibited good cyclic stability and negligible metal leaching. According to density functional theory (DFT) calculations, the visible-light-driven transformation of two copper states between trigonal bipyramidal sites and octahedral sites in the crystal structure of Cu2(OH)PO4 facilitates the generation of OH and SO4- radicals from the activation of PMS and cleavage of O-O bonds. This study provides the proof-in-concept demonstration of activation of PMS driven by visible light, making the SO4- radicals-based AOPs much easier, more economical and more sustainable in engineering applications for water and wastewater treatment.

Authors+Show Affiliations

State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, 150090, PR China.School of Chemical Engineering, Sichuan University, Chengdu, 610065, PR China.State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, 150090, PR China.State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, 150090, PR China. Electronic address: zzjjnn_4@163.com.State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, 150090, PR China. Electronic address: sjyou@hit.edu.cn.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

29524820

Citation

Liu, Guoshuai, et al. "Visible-light-driven Photocatalytic Activation of Peroxymonosulfate By Cu2(OH)PO4 for Effective Decontamination." Chemosphere, vol. 201, 2018, pp. 197-205.
Liu G, Zhou Y, Teng J, et al. Visible-light-driven photocatalytic activation of peroxymonosulfate by Cu2(OH)PO4 for effective decontamination. Chemosphere. 2018;201:197-205.
Liu, G., Zhou, Y., Teng, J., Zhang, J., & You, S. (2018). Visible-light-driven photocatalytic activation of peroxymonosulfate by Cu2(OH)PO4 for effective decontamination. Chemosphere, 201, 197-205. https://doi.org/10.1016/j.chemosphere.2018.03.005
Liu G, et al. Visible-light-driven Photocatalytic Activation of Peroxymonosulfate By Cu2(OH)PO4 for Effective Decontamination. Chemosphere. 2018;201:197-205. PubMed PMID: 29524820.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Visible-light-driven photocatalytic activation of peroxymonosulfate by Cu2(OH)PO4 for effective decontamination. AU - Liu,Guoshuai, AU - Zhou,Yanan, AU - Teng,Jie, AU - Zhang,Jinna, AU - You,Shijie, Y1 - 2018/03/02/ PY - 2017/08/19/received PY - 2018/02/26/revised PY - 2018/03/01/accepted PY - 2018/3/11/pubmed PY - 2018/8/1/medline PY - 2018/3/11/entrez KW - Decontamination KW - Peroxymonosulfate KW - Photocatalytic activation KW - Visible light SP - 197 EP - 205 JF - Chemosphere JO - Chemosphere VL - 201 N2 - The advanced oxidation process (AOP) based on SO4- radicals draws an increasing interest in water and wastewater treatment. Producing SO4- radicals from the activation of peroxymonosulfate (PMS) by transition metal ions or oxides may be problematic due to high operational cost and potential secondary pollution caused by metal leaching. To address this challenge, the present study reports the efficient production of SO4- radicals through visible-light-driven photocatalytic activation (VL-PCA) of PMS by using Cu2(OH)PO4 single crystal for enhanced degradation of a typical recalcitrant organic pollutant, i.e., 2,4-dichlorophenol (2,4-DCP). It took only 7 min to achieve almost 100% removal of 2,4-DCP in the Cu2(OH)PO4/PMS system under visible-light irradiation and pH-neutral condition. The 2,4-DCP degradation was positively correlated to the amount of Cu2(OH)PO4 and PMS. Both OH and SO4- radicals were responsible for enhanced degradation performance, indicated by radical scavenger experiments and electron spin resonance (ESR) measurements. The Cu2(OH)PO4 single crystal exhibited good cyclic stability and negligible metal leaching. According to density functional theory (DFT) calculations, the visible-light-driven transformation of two copper states between trigonal bipyramidal sites and octahedral sites in the crystal structure of Cu2(OH)PO4 facilitates the generation of OH and SO4- radicals from the activation of PMS and cleavage of O-O bonds. This study provides the proof-in-concept demonstration of activation of PMS driven by visible light, making the SO4- radicals-based AOPs much easier, more economical and more sustainable in engineering applications for water and wastewater treatment. SN - 1879-1298 UR - https://www.unboundmedicine.com/medline/citation/29524820/Visible_light_driven_photocatalytic_activation_of_peroxymonosulfate_by_Cu2_OH_PO4_for_effective_decontamination_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0045-6535(18)30409-0 DB - PRIME DP - Unbound Medicine ER -