Mesoporous silica dispersed Co3O4-CuO nanocomposite and its catalytic reduction of 4-nitrophenol

Herein, a catalyst Co3O4-CuO nanocomposite uniformly dispersed on mesoporous silica nanospheres (MSN) has been successfully synthesized through hydrothermal method. The synthesis method is simple and convenient, the prepared Co3O4-CuO nanocomposites have high dispersibility, and the support SiO2 mai...

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Bibliographic Details
Published in:Materials research express 2022-07, Vol.9 (7), p.075006
Main Authors: Ma, Yunlei, Zhu, Yunjing, Yue, Haopeng, Jiang, Guojian, Wu, Dandan
Format: Article
Language:English
Subjects:
Aminophenol
Catalysts
Catalytic converters
catalytic reduction
Chemical reduction
Cobalt oxides
Dispersion
hydrothermal
mesoporous silica
Nanocomposites
Nanospheres
Nitrophenol
p-nitrophenol
Silicon dioxide
Substrates
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Summary:Herein, a catalyst Co3O4-CuO nanocomposite uniformly dispersed on mesoporous silica nanospheres (MSN) has been successfully synthesized through hydrothermal method. The synthesis method is simple and convenient, the prepared Co3O4-CuO nanocomposites have high dispersibility, and the support SiO2 maintains the structure of mesoporous nanospheres. What’s more, the porous structure enables the obtained composite to have a high specific surface area (128.89 m2 g−1), which is easier to be contacted by catalytic substrates. The catalytic reduction of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP) was investigated. The results show that the nanocomposite catalyst Co3O4-CuO@MSN present good catalytic performance, which can completely convert 4-NP to 4-AP in 200 s and the reaction rate constant k is up to 0.149 s−1. More important, the possible degradation mechanism was also proposed in the paper.
ISSN:2053-1591
DOI:10.1088/2053-1591/ac80a5