Modulating Direct Growth of Copper Cobaltite Nanostructure on Copper Mesh as a Hierarchical Catalyst of Oxone Activation for Efficient Elimination of Azo Toxicantopen access
- Authors
- Mao, Po-Hsin; Kwon, Eilhann; Chang, Hou-Chien; Bui, Ha Manh; Phattarapattamawong, Songkeart; Tsai, Yu-Chih; Lin, Kun-Yi Andrew; Ebrahimi, Afshin; Yee, Yeoh Fei; Yuan, Min-Hao
- Issue Date
- Dec-2022
- Publisher
- MDPI
- Keywords
- AOPs; catalysts; CuCo2O4; mesh; PMS; sulfate radical
- Citation
- Nanomaterials, v.12, no.24, pp.1 - 20
- Indexed
- SCIE
SCOPUS
- Journal Title
- Nanomaterials
- Volume
- 12
- Number
- 24
- Start Page
- 1
- End Page
- 20
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/185143
- DOI
- 10.3390/nano12244396
- ISSN
- 2079-4991
- Abstract
- 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.
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