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

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

Yibing Li ^a,b, ,
Ali Jawad ^b ,
Aimal Khan ^b ,
Xiaoyan Lu ^b ,
Zhuqi Chen ^b ,
Weidong Liu ^a ,
Guochuan Yin ^b

a College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua 321004, Zhejiang, China;
b Hubei Key Laboratory of Material Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, Hubei, China

Received Date: 26 March 2016
Revised Date: 29 March 2016

Fund Project: This work was supported by the National Natural Science Foundation of China (21273086) and Chutian Scholar Foundation from Hubei Province, China.

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.
- Synergistic effect,
- Phenol degradation,
- Copper/cobalt oxide catalyst,
- Mechanistic study,
- Bicarbonate-activated H₂O₂
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Synergistic degradation of phenols by bimetallic CuO-Co₃O₄@γ-Al₂O₃ catalyst in H₂O₂/HCO₃^- system