No abstract

No abstract

Tailoring photocatalytic performance of TiO 2 through tuning crystal phase and hybridization is a big challenge in the field of photocatalytic application. In this study, the mesoporous TiO 2 (M-TiO 2 ) 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 TiO 2 . The pure anatase titanium dioxides (MA-TiO 2 ) were prepared using the pure pollen as the template, while those using the acidified pollen template were anatase and rutile polycrystalline titanium dioxide (MAR-TiO 2 ) which exhibited better catalytic activity. Furthermore, the hybridization between MAR-TiO 2 and graphene oxide (MAR-TiO 2 /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-TiO 2 , the MAR-TiO 2 /GO nano-composites possessed large specific surface area and narrow band gap due to the synergetic effect between MAR-TiO 2 and GO, which increased photocatalytic activity towards the photo-degradation of MO under ultraviolet and visible light. The degradation rates of MAR-TiO 2 /GO under UV light and visible light were 92 % in 105 min and 97 % in 540 min, respectively.

No abstract