Nano-Titanium Dioxide Synthesis in AOT Microemulsion System with Salinity Scan

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Nanoparticle synthesis is part of an emerging field in nanotechnology. Applications take advantage of the high surface area and confinement effects, which lead to nanostructures with properties different from those of conventional materials. The main focus of this work was on nanoparticle synthesis by the use of microemulsions. Change in nanoparticle size due to change in salinity concentration and type of microemulsion was explored. Titanium dioxide was prepared by a precipitation technique in which TiCl<SUB>4</SUB> was solubilized in the microemulsion system of <I>n</I>-heptane/water/NaCl/sodium <I>bis</I>(2-ethylhexyl) sulfosuccinate (AOT) and reacted with NH<SUB>4</SUB>OH at a controlled temperature of 30°C. The results showed that different types of microemulsions produced titanium dioxides with different characteristics including different particle sizes. Increasing NaCl concentration strongly influenced the micellar size in both o/w and bicontinuous microemulsions, but it has only a slight effect in w/o microemulsions. Increasing TiCl<SUB>4</SUB> concentration decreased micellar size in all types of microemulsions. The TiO<SUB>2</SUB> obtained from an o/w microemulsion had a surface area and particle size similar to those of the commercial titanium dioxide, P25. For a bicontinuous microemulsion, titanium dioxide product was polydisperse with various particle sizes. Titanium dioxide synthesized in w/o microemulsions was smallest in particle size and highest in specific surface area. The particles were highly crystalline and only anatase phase was obtained in high salt concentrations.

収録刊行物

  • Journal of chemical engineering of Japan

    Journal of chemical engineering of Japan 37(2), 279-285, 2004-02-01

    The Society of Chemical Engineers, Japan

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各種コード

  • NII論文ID(NAID)
    10013339441
  • NII書誌ID(NCID)
    AA00709658
  • 本文言語コード
    ENG
  • 資料種別
    ART
  • ISSN
    00219592
  • NDL 記事登録ID
    6863135
  • NDL 雑誌分類
    ZP1(科学技術--化学・化学工業)
  • NDL 請求記号
    Z53-R395
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
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