Synthesis, Characterization, and Application of Zr,S Co-doped TiO2as Visible-light Active Photocatalyst

Bulletin of the Korean chemical society

Wha-Jung Kim¹  Tae-Jeong Kim¹  Sun Woo Kim¹  Romana Khan¹ 

关键词: Zr;    S-doping;    TiO2;    Visible light photocatalyst;    Toluene decomposition;   

DOI  :  

学科分类：化学（综合）

来源: Korean Chemical Society

【 摘 要 】

A series of Zr,S co-doped TiO2 were synthesized by a modified sol-gel method and characterized by various spectroscopic and analytical techniques. The presence of sulfur caused a red-shift in the absorption band of TiO2. Co-doping of sulfur and zirconium (Zr-TiO2-S) improves the surface properties such as surface area, pore volume, and pore diameter and also enhances the thermal stability of the anatase phase. The Zr-TiO2-S systems are very effective visible-light active catalysts for the degradation of toluene. All reactions follow pseudo firstorder kinetics with the decomposition rate reaching as high as 77% within 4 h. The catalytic activity decreases in the following order: Zr-TiO2-S >TiO2-S >Zr-TiO2>TiO2 P-25, demonstrating the synergic effect of codoping with zirconium and sulfur. When the comparison is made within the series of Zr-TiO2-S, the catalytic performance is found to be a function of Zr-contents as follows: 3 wt % Zr-TiO2-S >0.5 wt % Zr-TiO2-S> 5 wt % Zr-TiO2-S >1 wt % Zr-TiO2-S. Higher calcination temperature decreases the reactivity of Zr-TiO2-S.

【 授权许可】

Unknown