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Item type:Publication, Anatase/Rutile TiO2 composite prepared via sonochemical process and their photocatalytic activity(2017-01-01); In this work, Anatase/Rutile mixed-phase titanium dioxide (TiO<inf>2</inf>) composite powders prepared by sonochemical process which titanium (IV) isopropoxide (TTIP) were used as titanium precursor. The as-prepared powders were calcined at different temperature in range of 400 to 1000 °C. TiO<inf>2</inf> phase ratio was evaluated by X-ray diffraction technique. Phase transformation of anatase to rutile phase in TiO<inf>2</inf> powder was initially obtained by calcined sample at 600 °C. The complete rutile phase was completely occurred at calcination temperature at 800 °C. Photocatalytic activity by TiO<inf>2</inf> photocatalysts was analyzed via the decolorization of Rhodamine B dye solution under LED white light irradiation. Anatase/Rutile composite with properly ratio in TiO<inf>2</inf> photocatalyst calcined at 700 °C performed the highest photocatalytic activity due to the enhancement of charge transfer at mixed phase interface and the decrease of electron-hole pair recombination.