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Free-standing hierarchical α-MnO2@CuO membrane for catalytic filtration degradation of organic pollutants.
Chemosphere. 2018 Jun; 200:237-247.C

Abstract

Catalytic membrane, due to its compact reactor assembling, high catalytic performance as well as low energy consumption, has proved to be more attractive for wastewater treatment. In this work, a free-standing α-MnO2@CuO membrane with hierarchical nanostructures was prepared and evaluated as the catalytic membrane to generate radicals from peroxymonosulfate (PMS) for the oxidative degradation of organic dyes in aqueous solution. Benefiting from the high mass transport efficiency and the hierarchical nanostructures, a superior catalytic activity of the membrane was observed for organic dyes degradation. As a typical organic dye, more than 99% of methylene blue (MB) was degraded within 0.23 s using dead-end filtration cell. The effects of flow rate, PMS concentration and buffer solution on MB degradation were further investigated. Besides MB, the catalytic membrane also showed excellent performance for the removal of other dyes, such as congo red, methyl orange, rhodamine B, acid chrome blue K and malachite green. Moreover, the mechanism study indicated that OH and SO4- generated from the interaction between PMS and Mn/Cu species with different oxidation states mainly accounted for the dyes degradation. The catalytic filtration process using α-MnO2@CuO catalytic membrane could provide a novel method for wastewater purification with high efficiency and low energy consumption.

Authors+Show Affiliations

State Key Laboratory of Urban Water Resource and Environment (SKLUWRE), Harbin Institute of Technology, 73 Huanghe Road, Nangang District, Harbin, 150090, PR China.State Key Laboratory of Urban Water Resource and Environment (SKLUWRE), Harbin Institute of Technology, 73 Huanghe Road, Nangang District, Harbin, 150090, PR China. Electronic address: hitliangheng@163.com.State Key Laboratory of Urban Water Resource and Environment (SKLUWRE), Harbin Institute of Technology, 73 Huanghe Road, Nangang District, Harbin, 150090, PR China.State Key Laboratory of Urban Water Resource and Environment (SKLUWRE), Harbin Institute of Technology, 73 Huanghe Road, Nangang District, Harbin, 150090, PR China.State Key Laboratory of Urban Water Resource and Environment (SKLUWRE), Harbin Institute of Technology, 73 Huanghe Road, Nangang District, Harbin, 150090, PR China.Department of Civil Engineering, The University of Hong Kong, Pokfulam, Hong Kong, China.State Key Laboratory of Urban Water Resource and Environment (SKLUWRE), Harbin Institute of Technology, 73 Huanghe Road, Nangang District, Harbin, 150090, PR China.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

29494904

Citation

Luo, Xinsheng, et al. "Free-standing Hierarchical α-MnO2@CuO Membrane for Catalytic Filtration Degradation of Organic Pollutants." Chemosphere, vol. 200, 2018, pp. 237-247.
Luo X, Liang H, Qu F, et al. Free-standing hierarchical α-MnO2@CuO membrane for catalytic filtration degradation of organic pollutants. Chemosphere. 2018;200:237-247.
Luo, X., Liang, H., Qu, F., Ding, A., Cheng, X., Tang, C. Y., & Li, G. (2018). Free-standing hierarchical α-MnO2@CuO membrane for catalytic filtration degradation of organic pollutants. Chemosphere, 200, 237-247. https://doi.org/10.1016/j.chemosphere.2018.02.113
Luo X, et al. Free-standing Hierarchical α-MnO2@CuO Membrane for Catalytic Filtration Degradation of Organic Pollutants. Chemosphere. 2018;200:237-247. PubMed PMID: 29494904.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Free-standing hierarchical α-MnO2@CuO membrane for catalytic filtration degradation of organic pollutants. AU - Luo,Xinsheng, AU - Liang,Heng, AU - Qu,Fangshu, AU - Ding,An, AU - Cheng,Xiaoxiang, AU - Tang,Chuyang Y, AU - Li,Guibai, Y1 - 2018/02/20/ PY - 2017/11/08/received PY - 2018/02/10/revised PY - 2018/02/19/accepted PY - 2018/3/2/pubmed PY - 2018/7/31/medline PY - 2018/3/2/entrez KW - Advanced oxidation processes KW - Catalytic membrane KW - Hierarchical inorganic membrane KW - Organic dye KW - Peroxymonosulfate SP - 237 EP - 247 JF - Chemosphere JO - Chemosphere VL - 200 N2 - Catalytic membrane, due to its compact reactor assembling, high catalytic performance as well as low energy consumption, has proved to be more attractive for wastewater treatment. In this work, a free-standing α-MnO2@CuO membrane with hierarchical nanostructures was prepared and evaluated as the catalytic membrane to generate radicals from peroxymonosulfate (PMS) for the oxidative degradation of organic dyes in aqueous solution. Benefiting from the high mass transport efficiency and the hierarchical nanostructures, a superior catalytic activity of the membrane was observed for organic dyes degradation. As a typical organic dye, more than 99% of methylene blue (MB) was degraded within 0.23 s using dead-end filtration cell. The effects of flow rate, PMS concentration and buffer solution on MB degradation were further investigated. Besides MB, the catalytic membrane also showed excellent performance for the removal of other dyes, such as congo red, methyl orange, rhodamine B, acid chrome blue K and malachite green. Moreover, the mechanism study indicated that OH and SO4- generated from the interaction between PMS and Mn/Cu species with different oxidation states mainly accounted for the dyes degradation. The catalytic filtration process using α-MnO2@CuO catalytic membrane could provide a novel method for wastewater purification with high efficiency and low energy consumption. SN - 1879-1298 UR - https://www.unboundmedicine.com/medline/citation/29494904/Free_standing_hierarchical_α_MnO2@CuO_membrane_for_catalytic_filtration_degradation_of_organic_pollutants_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0045-6535(18)30325-4 DB - PRIME DP - Unbound Medicine ER -