Abstract
In the study, porous amorphous silica minerals including Porous Silicon (PS), Diatomite Filter Aid (DFA) and Opal (Op) were chosen as carriers or supports to prepare TiO2/PS, TiO2/DFA and TiO2/Op composites by chemical co-precipitation method. The compound materials were characterized by SEM, TEM, and the photo-catalytic property of the prepared composites was investigated by degradation of Rhodamine B (RhB). Characterization showed that nanoTiO2 was coated on the surface of porous amorphous silica minerals. The crystal form of TiO2 was mainly anatase, and the size of which was nanoscale. Through comparative analysis, the photo-catalytic efficiency of TiO2/PS composite was the best, followed by TiO2/ DFA, and then TiO2/Op.
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