CHARACTERIZATION OF ACIDITY OF PILLARED CLAYS BY PROTON AFFINITY DISTRIBUTION AND DRIFT SPECTROSCOPY

被引：29

作者：

BANDOSZ, TJ ^{[1
]}

JAGIELLO, J ^{[1
]}

PUTYERA, K ^{[1
]}

SCHWARZ, JA ^{[1
]}

机构：

[1] SYRACUSE UNIV,DEPT CHEM ENGN & MAT SCI,SYRACUSE,NY 13244

来源：

JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS | 1994年 / 90卷 / 23期

关键词：

D O I：

10.1039/ft9949003573

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Diffuse reflectance FTIR (DRIFT) spectra and potentiometric titration data have been obtained for montmorillonite samples pillared with different polycations. The IR spectra are interpreted after deconvolution into Voigt band profiles. The titration data are analysed using a stable numerical method for the solution of the adsorption integral equation (SAIEUS). The pK distributions obtained are used to characterize the acidic properties of the modified minerals to demonstrate the relationship between these properties and the coordination of cations in the pillaring species. Heat treatment enhances the acidity of the materials which may be the result of the rearrangement of pillars (dehydroxylation). The approach presented enables one to assess both qualitatively and quantitatively the number and strength of acidic sites present on the surface of pillared clays.

引用

页码：3573 / 3578

页数：6

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