• 1 Department of Environmental Engineering & Innovation and Development Center of Sustainable Agriculture, National Chung Hsing University, Taichung 402, Taiwan
  • 2 Department of Earth Resources and Environmental Engineering, Hanyang University, SeongDong-Gu, Seoul 133-791, Republic of Korea
  • 3 Department of Chemical Engineering, National Chung Hsing University, Taichung 402, Taiwan
  • 4 Department of Environmental Sciences, Saigon University, Ho Chi Minh 700000, Vietnam
  • 5 Department of Environmental Engineering, King Mongkut's University of Technology Thonburi, Bangkok 10140, Thailand
  • 6 Environment Research Center, Department of Environmental Health Engineering, Isfahan University of Medical Sciences Isfahan, Isfahan 81746-73461, Iran
  • 7 School of Materials and Mineral Resources Engineering, Engineering Campus, Universiti Sains Malaysia, Penang 14300, Malaysia
  • 8 Department of Occupational Safety and Health, China Medical University, Taichung 40402, Taiwan
Nanomaterials (Basel), 2022 Dec 09;12(24).
PMID: 36558250 DOI: 10.3390/nano12244396


As cobalt (Co) has been the most useful element for activating Oxone to generate SO4•-, this study aims to develop a hierarchical catalyst with nanoscale functionality and macroscale convenience by decorating nanoscale Co-based oxides on macroscale supports. Specifically, a facile protocol is proposed by utilizing Cu mesh itself as a Cu source for fabricating CuCo2O4 on Cu mesh. By changing the dosages of the Co precursor and carbamide, various nanostructures of CuCo2O4 grown on a Cu mesh can be afforded, including nanoscale needles, flowers, and sheets. Even though the Cu mesh itself can be also transformed to a Cu-Oxide mesh, the growth of CuCo2O4 on the Cu mesh significantly improves its physical, chemical, and electrochemical properties, making these CuCo2O4@Cu meshes much more superior catalysts for activating Oxone to degrade the Azo toxicant, Acid Red 27. More interestingly, the flower-like CuCo2O4@Cu mesh exhibits a higher specific surface area and more superior electrochemical performance, enabling the flower-like CuCo2O4@Cu mesh to show the highest catalytic activity for Oxone activation to degrade Acid Red 27. The flower-like CuCo2O4@Cu mesh also exhibits a much lower Ea of Acid Red 27 degradation than the reported catalysts. These results demonstrate that CuCo2O4@Cu meshes are advantageous heterogeneous catalysts for Oxone activation, and especially, the flower-like CuCo2O4@Cu mesh appears as the most effective CuCo2O4@Cu mesh to eliminate the toxic Acid Red 27.

* Title and MeSH Headings from MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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