2006•CHINESE JOURNAL OF CATALYSIS (CHINESE VERSION)Requires access
Preparation and Characterization of TiO_2-CeO_2 Catalyst for Catalytic Wet Air Oxidation of Phenol
Jianbing Wang
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Abstract
TiO_2-CeO_2 catalysts for catalytic wet air oxidation of phenol were prepared by coprecipitation. Effects of proportion of active components, calcination temperature, calcination time, and pH value during the aging process on the catalyst activity were investigated. The results indicated that keeping a constant pH of 11 during the aging was crucial for the catalytic activity of TiO_2-CeO_2. The microstructure of the catalysts was characterized by thermogravimetry-differential thermal analysis, N_2 adsorption-desorption, X-ray diffraction, and X-ray photoelectron spectroscopy. The physical and chemical properties, such as BET specific surface area, chemisorbed oxygen, and relative content of Ce(Ⅲ) or Ti(Ⅲ) on the surface of TiO_2-CeO_2, had significant influence on the catalytic activity of the TiO_2-CeO_2 catalysts.