Korean Journal of Metals and Materials (대한금속재료학회지)

The Korean Institute of Metals and Materials (대한금속재료학회)
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Synthesis of Nano-sized TiO2 Powder using a Hydrothermal Process

수열합성법을 이용한 TiO2 나노 입자의 합성

  • Kim, Gang Hyuk (Department of Metallurgical Engineering, Dong-A University) ;
  • Lee, Woo Jin (Department of Metallurgical Engineering, Dong-A University) ;
  • Kim, Donggyu (Department of Metallurgical Engineering, Dong-A University) ;
  • Lee, Sung Keun (Department of Metallurgical Engineering, Dong-A University) ;
  • Lee, Sang Hwa (Department of Metallurgical Engineering, Dong-A University) ;
  • Kim, Insoo (Department of Metallurgical Engineering, Dong-A University)
  • Received : 2010.01.07
  • Published : 2010.06.22
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Abstract

This paper investigated the synthesis conditions of nano-sized $TiO_2$ powder in a hydrothermal process at a temperature range of $100{\sim}180^{\circ}C$ considering the precipitation agent, precipitation pH, reaction temperature and time. Titanium hydroxide formed by $NH_4OH$ exhibited a lower crystallization temperature than that by NaOH and formed less aggregated $TiO_2$ particles. As the precipitation pH increased above 8, the shape of the particles changed from spherical to needle form, which appeared to be caused by dissolution and re-precipitation of the titanium hydroxide in an alkali environment.

Keywords

Acknowledgement

Supported by : 동아대학교

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