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

Three-dimensional (3D) ordered and wormhole-like MoO sub(3) 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 MoO sub(3) samples were characterized by transmission electron microscope (TEM), X-ray diffraction (XRD), thermogravimetric analysis/differenctial scanning calorimetry (TG/DSC), and N sub(2) adsorption-desorption measurement. The catalytic performance of MoO sub(3) mesoporous structure was evaluated by hydrogen temperature-programmed reduction (H sub(2)-TPR), and complete oxidation of toluene and carbon monoxide (CO). It was found that the initiation temperatures of toluene were 203[degrees]C, 215 [degrees]C and 225[degrees]C, respectively, and the initiation temperatures of CO were 114[degrees]C, 158[degrees]C and 180 [degrees]C, 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 MoO sub(3) materials.