Preparation and photocatalytic degradation decoloring of TiO2/reduced graphene oxide composites

In order to compare the photocatalytic degradation decoloring performance of TiO2/reduced graphene oxide (rGO) composites and TiO2, TiO2 of different crystal forms and TiO2/rGO composites were prepared by the hydrothermal method using tetrabutyl titanate as a precursor. TiO2 and TiO2/rGO composites were characterized by ultraviolet diffuser, Fourier transform infrared spectroscopy, Raman spectrography, X-ray diffractometer, scanning electron microscope and so on. The degradation decoloring effect of Reactive Red 3BS dye by mixed crystal TiO2 and mixed crystal TiO2/rGO composites were analyzed. The results show that mixed crystal TiO2 with coexisting anatase and rutile can be prepared under of hydrothermal reaction at 150℃ for 12 h and calcination at 650℃ for 4 h. Under alkaline conditions, pure brookite TiO2 can be prepared under hydrothermal reaction at 140℃ for 72 h without calcination. Mixed crystal TiO2 with coexisting anatase and rutile has certain degradation decoloring effect on Reactive Red 3BS dye. The degradation decoloring rate of mixed crystal TiO2/rGO composites is up to 99% after 120 min. Copyright No content may be reproduced or abridged without authorization.