Low temperature synthesis of nano-sized (Sn0.25,Ti0.75)O2 photocatalysts by a molten salt method
Hua Tiana, Junfeng Maa, b, , , Lijin Xiea, Zhongqiang Zhaoa, Jun Zhoua, Yonggang Wangb, Jiantao Taob and Xiaoyi Zhub
aCollege of Chemistry and Chemical Engineering, Ocean University of China, 5 Yu Shan Road, Qingdao 266003, PR China bInstitute of Materials Sciences and Engineering, Ocean University of China, 5 Yu Shan Road, Qingdao 266003, PR China Received 6 December 2005; revised 18 December 2005; accepted 14 February 2006. Available online 18 April 2006.
Nano-sized (Sn0.25,Ti0.75)O2 photocatalysts were successfully synthesized by a molten salt (MS) method at 260 °C for 2 h, where a homogeneous precipitate containing titanium and tin cations as a precursor. The synthesized powders were investigated by X-ray diffraction (XRD), transmission electron microscopy (TEM) and UV–vis, respectively. The results show that the products are composed of homogeneously spherical particles with an average size of ca.10 nm, and have better UV absorption and visible light response when the reaction temperature is increased to 400 °C.
Keywords: D. TiO2; Sn; Molten salt method; Nano-sized photocatalyst