期刊
JOURNAL OF ENVIRONMENTAL SCIENCES
卷 23, 期 12, 页码 2078-2086出版社
SCIENCE PRESS
DOI: 10.1016/S1001-0742(10)60674-2
关键词
benzene elimination; nanocasting; mesoporous Co3O4-CeO2; 2D/3D structural; Co/Ce ratios
资金
- National Natural Science Funds for Distinguished Young Scholar [20725723]
- National Basic Research Program of China [2010CB732300]
- National High Technology Research and Development Program of China [2006AA06A310]
Mesostructured Co3Co4-CeO2 composite was found to be an effective catalytic material for the complete oxidation of benzene. The Co3Co4-CeO2 catalysts with different Co/Ce ratios (mol/mol) were prepared via the nanocasting method and the mesostructure was replicated from two-dimensional (2D) hexagonal SBA-15 and three-dimensional (3D) cubic KIT-6 silicas, respectively. All the obtained Co3O4-CeO2 catalysts exhibited the similar symmetry with the parent silicas and well ordered mesostructures. The Co3O4-CeO2 catalysts with 2D mesostructure showed lower catalytic activities than the corresponding 3D meaterials. The Co3O4-Ceo(2) catalyst nanocasted from KIT-6 and with the Co/Ce ration of 16/1 possessed the best catalytic benzene oxidation activity due to larger quantities of surface hydroxyl groups and surface oxygenated species. The mesostructured Co3O4-CeO2 material thus shows great potential as a promising eco-environmental catalyst for benzene effective elimination.
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