▎ 摘　　要

Tailoring photocatalytic performance of TiO2 through tuning crystal phase and hybridization is a big challenge in the field of photocatalytic application. In this study, the mesoporous TiO2 (M-TiO2) particles with tunable crystal phase were synthesized using rape pollen as the bio-template with and without acid treatment. It was found that the acidification pretreatment of pollen template had obvious effect on the crystal phase of TiO2. The pure anatase titanium dioxides (MA-TiO2) were prepared using the pure pollen as the template, while those using the acidified pollen template were anatase and rutile polycrystalline titanium dioxide (MAR-TiO2) which exhibited better catalytic activity. Furthermore, the hybridization between MAR-TiO2 and graphene oxide (MAR-TiO2/GO) were achieved by the hydrothermal methods and their photocatalytic performance was studied by the degradation of methyl orange (MO) under ultraviolet and visible light. Compared with MAR-TiO2, the MAR-TiO2/GO nano-composites possessed large specific surface area and narrow band gap due to the synergetic effect between MAR-TiO2 and GO, which increased photocatalytic activity towards the photo-degradation of MO under ultraviolet and visible light. The degradation rates of MAR-TiO2/GO under UV light and visible light were 92 % in 105 min and 97 % in 540 min, respectively.