关键词: 纳米TiO2, 光催化材料, 银, 氟

Abstract: TiO2 photocatalytic materials with silver, silver and fluorin doping, and porous nickel as carrier were prepared by hydrothermal method. The samples were characterized by XRD, TEM, SEM, FT-IR, UV-Vis and XPS. The photocatalytic performances of the samples were estimated by degrading Rhodamine B. The photocatalytic degradation of Rhodamine B follows the zero order reaction kinetics. The base of samples is anatase titanium oxide. After calcination at 500℃ for 0.5 h, the photocatalytic performance of materials has been improved. Increasing silver-doped amount, the photocatalytic performance of samples increases and then decreases. When the silver-doped amount is more than 0.6%, the photocatalytic performance of material increases with its doping, the optimum doping dosage is 1.2%. The photocatalytic performances increase by calcining, Ag optimum doping dosage is 0.8%. The photocatalytic performances of 1.2% silver and 2.0% fluorin jointly doped samples are better than those with silver singly.

Key words: nanometer titanium dioxide, photocatalytic material, silver, fluorin