Heterogeneous Electro-Fenton catalysis with HKUST-1-derived Cu@C decorated in 3D graphene network

Yulin Yang; Ying Liu; Xian Fang; Wei Miao; Xiaoyan Chen; Jing Sun; Bing-Jie Ni; Shun Mao

doi:10.1016/j.chemosphere.2019.125423

Heterogeneous Electro-Fenton catalysis with HKUST-1-derived Cu@C decorated in 3D graphene network

Chemosphere. 2020 Mar:243:125423. doi: 10.1016/j.chemosphere.2019.125423. Epub 2019 Nov 22.

Authors

Yulin Yang¹, Ying Liu¹, Xian Fang¹, Wei Miao¹, Xiaoyan Chen¹, Jing Sun¹, Bing-Jie Ni¹, Shun Mao²

Affiliations

¹ Biomedical Multidisciplinary Innovation Research Institute, Shanghai East Hospital, State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai, 200092, China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai, 200092, China.
² Biomedical Multidisciplinary Innovation Research Institute, Shanghai East Hospital, State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai, 200092, China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai, 200092, China. Electronic address: shunmao@tongji.edu.cn.

PMID: 31995878
DOI: 10.1016/j.chemosphere.2019.125423

Abstract

Transition metal and nanocarbon-based composites with high activity and stability draw great attention in electro-Fenton system for organic pollutants removal. In this study, HKUST-1-derived Cu@C nanoparticles embedded within three-dimensional reduced graphene oxide (rGO) network (denoted as 3DG/Cu@C) is synthesized through a simple strategy. The prepared catalyst shows ordered 3D porous carbon structure and Cu@C NPs are uniformly dispersed in the matrix. The 3DG/Cu@C is used as heterogeneous electro-Fenton (hetero-EF) catalyst and shows outstanding performance in various persistent organic pollutants removal. High concentration Rhodamine B (RhB) (40 mg L^-1) can achieve a complete decolorization within 150 min with 25 mg L^-1 3DG/Cu@C catalyst, which is one of the lowest catalyst dosages in hetero-EF for RhB removal. More importantly, the 3DG/Cu@C achieves high RhB mineralization efficiency of 81.5% and exhibits high catalytic performance in a wide pH window from 3 to 9. The 3DG/Cu@C also remains high efficiency after five successive reaction cycles. The working mechanism study shows that RhB is mainly oxidized by ^•OH and O₂^•- radicals through hetero-EF and anodic oxidation processes. The high stability and outstanding performance of 3DG/Cu@C provide new insights in organic pollutants removal by hetero-EF process with transition metal and nanocarbon-based catalysts.

Keywords: 3D graphene network; Cu@C nanoparticle; Heterogeneous electro-Fenton; Persistent organic pollutants; Reactive oxygen radicals.

MeSH terms

Catalysis
Copper / chemistry
Electrodes
Fluorescent Dyes / chemistry*
Graphite / chemistry*
Hydrogen Peroxide / chemistry*
Iron / chemistry
Metal Nanoparticles / chemistry
Metal-Organic Frameworks / chemistry
Oxidation-Reduction
Rhodamines / chemistry*
Water Pollutants, Chemical / analysis*
Water Purification / methods*

Substances

Fluorescent Dyes
Metal-Organic Frameworks
Rhodamines
Water Pollutants, Chemical
bis(1,3,5-benzenetricarboxylate)tricopper(II)
graphene oxide
Graphite
Copper
Hydrogen Peroxide
Iron
rhodamine B