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http://dx.doi.org/10.5012/bkcs.2012.33.1.243

Synthesis and High Photocatalytic Activity of Zn-doped TiO2 Nanoparticles by Sol-gel and Ammonia-Evaporation Method  

Nguyen, Thanh Binh (Department of Chemistry, University of Ulsan)
Hwang, Moon-Jin (Energy Harvest-Storage Research Center, University of Ulsan)
Ryu, Kwang-Sun (Department of Chemistry, University of Ulsan)
Publication Information
Bulletin of the Korean Chemical Society / v.33, no.1, 2012 , pp. 243-247 More about this Journal
Abstract
Photocatalysis has been applied to decompose the waste and toxic materials produced in daily life and in the global environment. Pure $TiO_2$ (Zn-$TiO_2$-0) and Zn-doped $TiO_2$ (Zn-$TiO_2$-x, x = 3-10 mol %) samples were synthesized using a novel sol-gel and ammonia-evaporation method. The Zn-doped $TiO_2$ samples showed high photocatalytic activity for the degradation of methylene blue (MB). The physicochemical properties of the samples were investigated using XRD, SEM, ICP, DLS and BET methods. In addition, the most important measurement of photocatalytic ability was investigated by a UV-vis spectrophotometer. The effects of the mol % of zinc ion doping in $TiO_2$ on photocatalytic activity were studied. Among the mol % Zn ions investigated, the Zn-$TiO_2$-9 sample showed the highest photoreactivity. This sample removed 91.4% of the MB after 4 h, while the pure $TiO_2$ only removed 46.4% of the MB.
Keywords
Zn-doped $TiO_2$; Photoreactivity; Degradation; Methylene blue;
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