Abstract
In this paper, three-dimensional ordered macroporous (3DOM) TiO2 and TiO2/SiO2 materials were prepared by traditional colloidal-crystal-templating method. The microstructures of samples were analysed by scanning electron microscope, X-ray diffraction analysis, thermogravimetric-differential thermal analysis and nitrogen adsorption/desorption. The results indicated that the microstructures of samples, including three-dimensional ordered macroporous structure and crystalline form, could be adjusted by changing the calcination temperatures. Finally, the samples were used as photocatalysts to decompose methyl orange wastewater under UV-light. Both 3DOM TiO2 and 3DOM TiO2/SiO2 displayed good photocatalytic ability. Moreover, the introduction of Si could increase the transformation temperature of TiO2 from anatase to rutile, which made 3DOM TiO2/SiO2 had better photocatalytic ability than pure 3DOM TiO2.
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