Fabrication and Excellent Catalytic Performance of Three-dimensional Ordered Mesoporous Molybdenum Oxides

doi:10.3724/SP.J.1077.2014.13233

Abstract

Abstract: Three-dimensional (3D) ordered and wormhole-like MoO₃ mesoporous structures were synthesized based on ultrasound-assisted vacuum impregnation method. Carbon template was used in the synthesis process, which was prepared by using mesoporous molecular sieve KIT-6. Hexaammonium molybdate acted as molybdenum source. The as-prepared MoO₃ samples were characterized by transmission electron microscope (TEM), X-ray diffraction (XRD), thermogravimetric analysis/differenctial scanning calorimetry (TG/DSC), and N₂ adsorption-desorption measurement. The catalytic performance of MoO₃ mesoporous structure was evaluated by hydrogen temperature-programmed reduction (H2-TPR), and complete oxidation of toluene and carbon monoxide (CO). It was found that the initiation temperatures of toluene were 203℃, 215℃ and 225℃, respectively, and the initiation temperatures of CO were 114℃, 158℃ and 180℃, respectively, with their conversion rates of 50%, 90% and 100%, respectively. The well catalytic performance was attributed to 3D ordered mesoporous structure and high surface area of as-obtained MoO₃materials.

Key words: template reagent, three-dimensional ordered mesopore, molybdenum oxide, toluene combustion, CO combustion

CLC Number:

TB34
TQ426

DU Yu-Cheng, ZHENG Guang-Wei, MENG Qi, WANG Li-Ping, FAN Hai-Guang, DAI Hong-Xing. Fabrication and Excellent Catalytic Performance of Three-dimensional Ordered Mesoporous Molybdenum Oxides[J]. Journal of Inorganic Materials, 2014, 29(2): 124-130.

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