Photocatalytic degradation of PCP-Na with TiO2 photocatalysis loaded with platinum

Titanium dioxide (TiO2) samples of different crystal forms were prepared by hydrolysis tetrabutyl titanate in various water to alkoxide ratios and sintering the hydrolysis product at different temperatures. The photocatalysts coated on hollow glass beads and loaded with platinum varying from 0.2% to 2.4% by weight. The photocatalytic degradation rate of sodium pentachlorophenolate (PCP-Na) depends on the preparing conditions such as: sintering temperatures, water to alkoxide ratios (R), platinum content and the size. The proper conditions of preparation photocatalysts are as follows: the ratio of TiO2: sodium silicate: hollow glass beads: platinum is 10:5:20:0.15 (w/w), R is 100, sintering temperature is 650 degrees C, and the size of hollow glass is 0.5-1 mm. Under these conditions, the ratio between acatase and rutile of the photocatalyst is 2:1, and the photocatalytic activity is high.