Preparation and Photocatalytic Activity of Bi Doped TiO2 with Visible-Light Response
A Bi-TiO2 composite with high photocatalytic activity was prepared using tetrabutyl titanate and bismuth nitrate as raw material by hydrothermal method. The structure was characterized by X-ray diffraction(XRD), transmission electron microscopy(TEM), X-ray energy dispersive spectroscopy(EDS), X-ray fluorescence(XRF) and UV-vis diffuse reflectance spectrophotometer(UV-vis DRS). The results show that anatase nanometer titanium dioxide was prepared, in which Bi3+ take the place of Ti4+. The surface area of the sample was higher, ca.312.6m2•g-1. Bi doping caused red-shift of the absorption spectrum, and the composite has better Visible-light Response. Bi-TiO2 shows higher photocatalytic avtivity to the degradation of resorcinol than pure TiO2. The optimum value of Bi doped was 1.00 %. After 120 minutes illuminating under 70W Halide Lamps, degradation rate of resorcinol can get to 100%.