Adsorption Properties of Silica Sorbents with Residues of Carboxylic and Aminocarboxylic Acids onto Surface Layer

Authors

  • D. S. Bakulina Chuiko Institute of Surface Chemistry of National Academy of Sciences of Ukraine
  • O. A. Dudarko Chuiko Institute of Surface Chemistry of National Academy of Sciences of Ukraine
  • A. K. Matkovsky Chuiko Institute of Surface Chemistry of National Academy of Sciences of Ukraine
  • G. R. Yurchenko Chuiko Institute of Surface Chemistry of National Academy of Sciences of Ukraine
  • Yu. L. Zub Chuiko Institute of Surface Chemistry of National Academy of Sciences of Ukraine

Abstract

Adsorption isotherms of nitrogen, n-hexane, pyridine, and diethylamine have been measured for silica adsorbents with residues of propionic and ethylenediaminetriacetic acids obtained by template method. The ordered structure of SBA-15 type has been found for synthesized samples with following parameters of porosity: Ssp = 550–650 m2g-1? Vs = 0.76–1.06 cm3g-1? d = 5.3–7.6 nm. The placement of carboxylic and aminocarboxylic groups in the pore surface layer and their specific adsorption interaction with electron-donor-molecules have been shown. The arrangement of adsorption isotherms of pyridine and dietylamine relatively to that of n-hexane depends on basicity of these molecules. The acidic post-synthetic treatment has been shown to be accompanied by the changes in texture rather than by appearance of additional proton-donor active cites.

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(1)
Bakulina, D. S.; Dudarko, O. A.; Matkovsky, A. K.; Yurchenko, G. R.; Zub, Y. L. Adsorption Properties of Silica Sorbents With Residues of Carboxylic and Aminocarboxylic Acids onto Surface Layer. Him. Fiz. Tehnol. Poverhni 2011, 2, 427-431.

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Vol. 2 No. 4 (2011): Chemistry, Physics and Technology of Surface / Himia, Fizika ta Tehnologia Poverhni

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