title: Catalytic oxidation of benzene over nanostructured porous Co3O4-CeO2 composite catalysts.
abstract: Mesostructured Co3O4-CeO2 composite was found to be an effective catalytic material for the complete oxidation of benzene. The Co3O4-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 materials. The Co3O4-CeO2 catalyst nanocasted from KIT-6 and with the Co/Ce ratio 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.
authors.affiliation: Department of Environmental Nano-materials, Research Center for Eco-Environmental Sciences, Chinese Academy ofSciences, Beijing 100085, China.
authors.forename: Chunyan
authors.initials: C
authors.lastname: Ma
authors.forename: Zhen
authors.initials: Z
authors.lastname: Mu
authors.forename: Chi
authors.initials: C
authors.lastname: He
authors.forename: Peng
authors.initials: P
authors.lastname: Li
authors.forename: Jinjun
authors.initials: J
authors.lastname: Li
authors.forename: Zhengping
authors.initials: Z
authors.lastname: Hao
mesh_terms: D001554:Benzene / Q000737:chemistry*; D002384:Catalysis; D002563:Cerium / Q000737:chemistry*; D003035:Cobalt / Q000737:chemistry*; D046529:Microscopy, Electron, Transmission; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure; D010084:Oxidation-Reduction; D010087:Oxides / Q000737:chemistry*; D056951:Photoelectron Spectroscopy; D014961:X-Ray Diffraction
chemical_list: D010087:Oxides; D002563:Cerium; D003035:Cobalt; C030583:ceric oxide; D001554:Benzene; C060728:cobalt oxide