Preparation and photocatalytic properities of the minimum size of transparent S/F co-doped titanium dioxide

• 1、Hebei Key Laboratory of Optic-electronic Information Materials, College of Physics Science and Technology, Hebei University, Baoding, Hebei 071002, China

Abstract：S/F co-doped nano TiO2 colorless and transparent emulsion with an average particle size of 2.7 nm has been synthesized by a novel complexation-controlled hydrolysis method at room temperature by using TiCl4, organic carboxylic acid, NH3•H2O, thiourea, ammonium fluoride and D-sorbitol etc as raw materials. The phase structure, particle size, and absorption spectrum of samples were characterized by XRD, nano laser particle size analyzer and ultraviolet-visible spectrophotometer, respectively. In addition, the influence of reaction conditions in the synthesis process was also studied. The results showed that the optimal photocatalytic conditions of degradation acid red 3R dye are as follow: the doping mass fraction of S/F 0.3%，pH 6, and the initial mass concentration of the dye 50 mg/L.

Keywords： sulfur and fluorine co-doping nanometer titanium dioxide photocatalyst complexation-controlled hydrolysis method photocatalysis