Preparation of Cadmium Sulfide Ultrafine Particles with Sharp Size-Distribution Using Cadmium Dioleylphosphate Microemulsion

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Cadmium dioleylphosphate (CDOLP) and sodium dioleylphosphate (SDOLP) are expected to form rigid microemulsion droplets. They were used as surfactants in place of sodium bis (2-ethylhexyl) sulfosuccinate (AOT), which has been often used for the preparation of cadmium sulfide (CdS) ultrafine particles in microemulsion (ME). CdS ultrafine particles were prepared by mixing hydrogen sulfide solution with the ME composed of CDOLP and SDOLP. The growth process of the particles through their coagulation is restricted more strongly, and the size distribution of the obtained particles was sharper than those in AOT-ME. Furthermore, in CDOLP/SDOLP-ME, the average number of cadmium ions per microemulsion droplet is larger and the number of contaminating "empty" ME droplets which contain no particle is much smaller than in AOT-ME systems. Dioleylphosphates are proper surfactants for the preparation of ultrafine particles with sharp size-distribution, because particle coagulation is restricted in the system. The restriction of the coagulation between larger particles is attributed to two mechanisms: 1) It is hard for larger particles to be exchanged between two fusing ME droplets through the "open channel" between them. 2) The ME droplets with the larger particles can hardly coalesce with the other ME droplets.

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  • Journal of chemical engineering of Japan  

    Journal of chemical engineering of Japan 32(1), 31-39, 1999-02 

    The Society of Chemical Engineers, Japan

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各種コード

  • NII論文ID(NAID)
    10002067030
  • 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
    4665074
  • 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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