Research Paper

Study on the Crystal Growth Kinetics of Nano TiO2 Prepared with Microwave Aid at Low Temperature

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  • (1. School of Chemical Engineering and Technology, Tianjing University, Tianjin 300072, China, 2. State Envtronmental Protection Key Laboratory of Odor Pollution Control, Tianjin 300191, China)

Received date: 2009-11-20

  Revised date: 2010-02-05

  Online published: 2010-07-19

Abstract

The TiO2 nanocrystal particles were prepared by low-temperature method. Firstly, hydrolysis of reactants was promoted with microwave radiation aid, then crystallization could be facilitated through the process of the second microwave radiation or aging in water bath. The characterization results show that the shape of TiO2 nanocrystal is sphere or short column, which are all in pure anatase phase. The kinetic studies indicate that the anatase TiO2 growth can be described as the twice order kinetic equation and the apparent activity energy is 59.47 kJ/mol with two-step microwave radiation, while the kinetic equation is conformed to the third order and the apparent activity energy is 19.44 kJ/mol with ageing process. The above comparison proves that the nanocrystal TiO2 would grow faster in short time with the two-step microwave radiation at low temperature.

Cite this article

FENG Wei, ZOU Ke-Hua, ZHAI Zen-Xiu . Study on the Crystal Growth Kinetics of Nano TiO2 Prepared with Microwave Aid at Low Temperature[J]. Journal of Inorganic Materials, 2010 , 25(8) : 815 -819 . DOI: 10.3724/SP.J.1077.2010.00815

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