Synthesis of flower-like Co3O4–CeO2 composite oxide and its application to catalytic degradation of 1,2,4-trichlorobenzene
Synthesis of flower-like Co3O4–CeO2 composite oxide and its application to catalytic degradation of 1,2,4-trichlorobenzene
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DOI：
10.1016/j.apcatb.2012.05.011
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发表时间：
2012-07
影响因子：
22.1
通讯作者：
Shijing Lin;Guijin Su;M. Zheng;Dekun Ji;Manke Jia;Yexuan Liu
中科院分区：
文献类型：
--
作者：
Shijing Lin;Guijin Su;M. Zheng;Dekun Ji;Manke Jia;Yexuan Liu
A micrometer-sized, nanostructured, flower-like Co3O4–CeO2composite oxide was synthesized by an ethylene-glycol-mediated process. The composite oxide was an assembly of polycrystalline nanoparticles, with a typical mesoporous structure. The composite's catalytic activity in 1,2,4-trichlorobenzene degradation was evaluated using a pulsed-flow microreactor–gas chromatography system, and compared with that of quartz sand, commercial CeO2, commercial Co3O4, and a Co3O4/CeO2equimass mixture. The composite oxide was a promising catalyst for 1,2,4-trichlorobenzene degradation. This is attributed to the structural features of the composite oxide with a high specific surface area and a high total pore volume, and the synergistic effect between the two composite phases. The easy creation of high-mobility active oxygen on CeO2and the easy cleavage of CoO bonds at the interface of the two components promote reactivity of Co3O4in 1,2,4-trichlorobenzene degradation. Pulsed catalytic theory suggests a first-order reaction between the composite oxide and 1,2,4-trichlorobenzene, with an apparent activation energy of about 27kJ/mol, and degradation on the Co3O4–CeO2composite oxide would occur easily.
