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http://dx.doi.org/10.5012/bkcs.2008.29.6.1217

Synthesis, Characterization, and Application of Zr,S Co-doped TiO2 as Visible-light Active Photocatalyst  

Kim, Sun-Woo (Department of Applied Chemistry, Kyungpook National University)
Khan, Romana (Department of Applied Chemistry, Kyungpook National University)
Kim, Tae-Jeong (Department of Applied Chemistry, Kyungpook National University)
Kim, Wha-Jung (School of Architecture, Kyungpook National University)
Publication Information
Bulletin of the Korean Chemical Society / v.29, no.6, 2008 , pp. 1217-1223 More about this Journal
Abstract
A series of Zr,S co-doped $TiO_2$ 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 $TiO_2$. Co-doping of sulfur and zirconium (Zr-$TiO_2$-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-$TiO_2$-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-$TiO_2$-S >$TiO_2$-S >Zr-$TiO_2$>$TiO_2$$\approx$ P-25, demonstrating the synergic effect of codoping with zirconium and sulfur. When the comparison is made within the series of Zr-$TiO_2$-S, the catalytic performance is found to be a function of Zr-contents as follows: 3 wt % Zr-TiO2-S >0.5 wt % Zr-$TiO_2$-S> 5 wt % Zr-$TiO_2$-S >1 wt % Zr-$TiO_2$-S. Higher calcination temperature decreases the reactivity of Zr-$TiO_2$-S.
Keywords
Zr,S-doping; TiO2; Visible light photocatalyst; Toluene decomposition
Citations & Related Records
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Times Cited By Web Of Science : 8  (Related Records In Web of Science)
Times Cited By SCOPUS : 3
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