Preparation of TiO2 nanoparticles by supercritical carbon dioxide

Chien I. Wu, Jiann Wen Huang, Ya Lan Wen, Shaw Bing Wen, Yun Hwei Shen, Mou Yung Yeh

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47 Citations (Scopus)


Nano-sized titanium dioxide TiO2 powder was successfully prepared from its precursor titanium (IV) isopropoxide (TTIP) by a system comprising of supercritical fluids microemulsion and supercritical-drying method, in which TTIP reacted in reversed micelles formed by surfactant Zonyl FSJ employing a supercritical carbon dioxide system. The milky white product, collected from the bottom of the pressure cell turned into sol-gel after sitting in the air for 5 days. Amorphous TiO2 particles with particles size 2-7 nm can be obtained from the sol-gel by the supercritical-drying method. The amorphous TiO2 particles were converted to anatase phase by calcining at 500 °C. Characterization of the TiO2 powder consisted of TEM, XRD and EDS methods.

Original languageEnglish
Pages (from-to)1923-1926
Number of pages4
JournalMaterials Letters
Issue number12-13
Publication statusPublished - 2008 Apr 30

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


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