Synergistic degradation of phenols by bimetallic CuO-Co3O4@γ-Al2O3 catalyst in H2O2/HCO3- system

doi:10.1016/S1872-2067(15)61092-0

Abstract

Abstract:

The development of new catalytic techniques for wastewater treatment has long attracted much attention from industrial and academic communities. However, because of catalyst leaching during degradation, catalysts can be short lived, and therefore expensive, and unsuitable for use in wastewater treatment. In this work, we developed a bimetallic CuO-Co₃O₄@γ-Al₂O₃ catalyst for phenol degradation with bicarbonate-activated H₂O₂. The weakly basic environment provided by the bicarbonate buffer greatly suppresses leaching of active Cu and Co metal ions from the catalyst. X-ray diffraction and X-ray photoelectron spectroscopy results showed interactions between Cu and Co ions in the CuO-Co₃O₄@γ-Al₂O₃ catalyst, and these improve the catalytic activity in phenol degradation. Mechanistic studies using different radical scavengers showed that superoxide and hydroxyl radicals both played significant roles in phenol degradation, whereas singlet oxygen was less important.

Key words: Synergistic effect, Phenol degradation, Copper/cobalt oxide catalyst, Mechanistic study, Bicarbonate-activated H₂O₂

Yibing Li, Ali Jawad, Aimal Khan, Xiaoyan Lu, Zhuqi Chen, Weidong Liu, Guochuan Yin. Synergistic degradation of phenols by bimetallic CuO-Co₃O₄@γ-Al₂O₃ catalyst in H₂O₂/HCO₃^- system[J]. Chinese Journal of Catalysis, 2016, 37(6): 963-970.

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URL: https://www.cjcatal.com/EN/10.1016/S1872-2067(15)61092-0

https://www.cjcatal.com/EN/Y2016/V37/I6/963

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Synergistic degradation of phenols by bimetallic CuO-Co₃O₄@γ-Al₂O₃ catalyst in H₂O₂/HCO₃^- system

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