中华医学超声杂志

应用化学 ›› 1994, Vol. 0 ›› Issue (1): 12-15.

• 研究论文 • 上一篇    下一篇

杂多酸的固载化Ⅲ．溶剂对H4SiW12O40·24H2O在活性炭上吸附的影响

王新平, 叶兴凯, 吴越   

  1. 中国科学院长春应用化学研究所 长春 130022
  • 收稿日期:1993-03-23 修回日期:1993-10-26 出版日期:1994-02-10 发布日期:1994-02-10

Studies of the Heterogenization of Heteropoly Acid Ⅲ. Effect of Solvent on the Adsorption of SiW12 on Activated CarFbon

Wang Xinping, Yie Xingkai, Wu Yue   

  1. Changchu Istitute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022
  • Received:1993-03-23 Revised:1993-10-26 Published:1994-02-10 Online:1994-02-10

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摘要： 研究了H4SiW12O40·24H2O(SiW12)在水、乙醇、乙酸、乙酸丁酯中在活性炭上的吸附得出,活性炭微孔结构对SiW12在其表面的吸附起着分子筛作用。水溶剂化的SiW12分子可顺利进入活性炭1.7nm左右的微孔,而其它溶剂化的SiW12分子,则需较大的孔径。提出了SiW12在活性炭表面吸附的微孔中孔扩散模型。

关键词: 杂多酸, 活性炭, 吸附, 固载

Abstract: The adsorption of 12-sillicotungstic acid(SiW12)on the active carbon has been investigated in water, ethanol, acetic acid and butyl acetate medium. A diffusion model for SiW12 adsorption in the micropore of active carbon has been proposed. The middle micropore of the active carbon plays an important role as a molecular sieve for adsorption of SiW12. The water solvated SiW12 molectiles can smoothly get into the micropore of diameter～1.7nm. However, for the SiW12 molecules solvated by other solvents only the micropores ηgreater diameter wotild be fifled.

Key words: heteropoly acid, active carbon, adsorption, heterogenzation

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