Journal of South China University of Technology(Natural Science Edition) ›› 2004, Vol. 32 ›› Issue (3): 5-9,19.

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Preparation and Property of a Novel Al3+-doped Silica Gel Adsorptive Material

Fang Yu-tang1 Ding Jing Fan1 Juan Yang1 Jian-ping Yang1 Xiao-xi2   

  1. 1.Key Laboratory of Enhanced Heat Transfer and Energy Conservation of the Ministryof Education, South China Univ.of Tech., Guangzhou 510640, Guangdong, China;
    2.Dept.of chemistry, Dongguan Univ.of Tech., Dongguan 523106, Guangdong, China
  • Received:2003-10-13 Online:2004-03-20 Published:2015-09-08
  • Contact: 方玉堂(1964-), 男, 副教授, 主要从事功能高分子多孔吸附材料研究. E-mail:pprtfang@scut.edu.cn
  • About author:方玉堂(1964-), 男, 副教授, 主要从事功能高分子多孔吸附材料研究.

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Abstract: A novel Al 3+ _doped silica gel adsorptive material with excellent adsorption property was pre-pared by treating ceramic fiber matrix with the aqueous solution of sodium silicate (Na 2 SiO 3 )and alu-minum salt etc ., as well as with pH value adjustment .The effects of impregnation conditions on the ad-sorptive property and surface structure of the novel material were investigated , thus obtaining the opti-mal reaction condition, that is, 26.7%(mass fraction)of Na 2 SiO 3 , 10%(mass fraction)of aluminum salt , impregnation time period of 120min , reaction temperature of 60 ℃and the pH value of the solution of 1.8.It is found that Al 3+ _doped silica gel can perfectly deposit on the surface and in the apertures of ceramic fiber , and its mesopores play a key role in adsorption.For the substitution insertion of alu-minum into the silica gel framework (Al 3+ doped), the adsorption property , heat resistance property and mechanical strength of the novel material are superior to those of silica gel .

Key words: impregnation, adsorption, Al3+-doped silica gel, heat resistance property;mechanical strength

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