超声波法合成钨酸铋光催化材料的研究

The Study of Light Photocatalytic Activities of Bismuth Tungstate

Bi_2WO_6是一种新型光催化剂,以其无毒、高效、价格低廉等显著特点在杀菌、介电、光催化等方面的应用前景十分广泛。本文采用超声波合成法制备出斜方晶系的Bi_2WO_6。重点研究了前驱液pH值、不同焙烧温度、不同焙烧时间对产物Bi_2WO_6的结构组成及光催化性能的影响。结果表明:在前驱液pH=1、焙烧温度600℃、焙烧时间2 h条件下制备的Bi_2WO_6对罗丹明B具有最佳光催化效果,其在紫外可见光照射下的降解率高达99.3%。

Bi2WO6 as a new photocatalyst is an efficient, non-toxic, inexpensive material. It has wide application prospect in terms of dielectric material, sterilization, photocatalysis. In this paper, the microcrystalline of Bi2WO6 was prepared by the means of ultrasonic synthesis method. This experiment was primarily about the effects of the precursor solution pH, calcination temperature and calcination time on the structure and photocatalytic properties of Bi2WO6, The＇ results showed that： Photocatalytic activity of Bi2WO6 prepared at 600℃. 2h, pH =1, for decomposition of Rhodamine B was best, and the degradation rate reaches as high as above 99.3% under the ultraviolet irradiate.