Effect of Synthesis Conditions on Photocatalytic Activities of Nanoparticulate TiO₂

Abstract:

In the present study, design of experiments (Orthogonal experiment) was used to find an optimal combination for the factors, which affect the catalytic activity of nano-crystalline TiO₂ powder synthesized by sol–gel method. Sixteen kinds of TiO₂ powder were prepared by changing three material ratio at four levels. The effects of calcinations temperature on the catalyst activity of TiO₂ were investigated by single factor experiments. TiO₂ were characterized by XRD. The results of design of experiments are examined by the direct observation analysis. The preparation conditions have been optimized as material ratio nTi(OC₄H₉)₄: nH₂O: nHN(C₂H₅OH)₂: nC₂H₅OH=1:2:2.5:20, mean 16.8 nm TiO₂ nanoparticle with anatase structure obtained at 500°C calcination. The photodegradation efficiency of methylene blue in aqueous solution is 99 % under 1g/L catalyst.

• Periodical: Advanced Materials Research (Volumes 299-300)
• Pages: 604-607
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.299-300.604
• Online since: July 2011
• Authors: Yan Jun Zhou, Hui Ling Du, Ping Qi, Ai Min Liu
• Keywords: Photocatalytic, Rate of Degradation, Sol-Gel Method, TiO₂

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