TiO2 supported on rod-like mesoporous silica SBA-15: Preparation, characterization and photocatalytic behaviour |
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| Authors: | Yanjuan Li Jinchun Tu Xiaotian Li Yue Chi Dianfan Yang |
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| Affiliation: | a College of Material Science and Engineering, Key Laboratory of Automobile Materials of Ministry of Education, Jilin University, 2699 Qianjin Street, Changchun, 130012, PR China
b College of Material and Chemical Engineering, Key Laboratory of Tropical Biological Resources of Ministry of Education, Hainan University, Haikou, 570228, PR China |
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| Abstract: | TiO2 nanoparticles have been successfully incorporated in the pores of mesoporous silica SBA-15 with different morphologies by a wet impregnation method. The composites were characterized by powder X-ray diffraction (XRD), scanning electron microscopy (SEM), inductively coupled plasma (ICP) emission spectroscopy, transmission electron microscopy (TEM), N2-sorption and UV-Vis diffuse reflectance spectroscopy. The photodegradation of methyl orange (MO) was used to study their photocatalytic property. It is indicated that the morphology of SBA-15 had a great influence on the photocatalytic activity of the composites. When TiO2/SBA-15 composite was prepared by loading TiO2 nanoparticles on uniform rod-like SBA-15 of 1 μm length, it showed higher photocatalytic degradation rate than that on less regular but much larger SBA-15 support. This difference was rationalized in terms of the homogeneously distributed and shorter channels of rod-like SBA-15, which favored mass transport and improved the efficient utilization of the pore surface. |
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| Keywords: | A. Oxides B. Chemical synthesis C. X-ray diffraction D. Catalytic properties |
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