FOURIER-TRANSFORM INFRARED STUDY OF CO-2 ADSORPTION ON NONSTOICHIOMETRIC STRONTIUM HYDROXYAPATITES

被引：35

作者：

ISHIKAWA, T

SAITO, H

KANDORI, K

机构：

来源：

JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS | 1992年 / 88卷 / 19期

关键词：

D O I：

10.1039/ft9928802937

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：

The surface of colloidal strontium hydroxyapatite (SrHAP) particles with different Sr:P molar ratios from 1.51 to 1.71 has been characterized by means of an FTNIR spectrometer. The IR spectra of the Sr-deficient SrHAP gave rise to 3684, 3674, 3662 and 3640 cm-1 bands, which are assigned to surface P-OH groups. The Sr-rich SrHAP exhibited a band at 3710 cm-1 in addition to the three surface P-OH bands. The amount of irreversible adsorption of CO2 on the Sr-rich SrHAP was larger than that on the Sr-deficient samples. The change in the spectra after CO2 adsorption by the sample proved that the irreversible adsorption sites of CO2 on the Sr-deficient SrHAP are the less-acidic surface P-OH groups giving the 3640 cm-1 band and those on the Sr-rich SrHAP are surface OH- ions. The mechanism of irreversible adsorption of CO2 is discussed.

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页码：2937 / 2942

页数：6

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