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Vol.48, No.6, 543 ~ 551, 2010
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| Title |
| Synthesis of Nano-sized TiO2 Powder using a Hydrothermal Process |
| 김동규 Dong Gyu Kim , 김인수 In Soo Kim , 이성근 Sung Keun Lee , 이우진 Woo Jin Lee , 이상화 Sang Hwa Lee , 김강혁 Gang Hyuk Kim |
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| Abstract |
| This paper investigated the synthesis conditions of nano-sized TiO2 powder in a hydrothermal process at a temperature range of 100~180℃ considering the precipitation agent, precipitation pH, reaction temperature and time. Titanium hydroxide formed by NH4OH exhibited a lower crystallization temperature than that by NaOH and formed less aggregated TiO2 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. |
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| Key Words |
| nanostructured materials, chemical synthesis, crystallization, X-ray diffraction, TiO2 hydrothermal synthesis |
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