Study of the thermal decomposition of a sepiolite by mid- and near-infrared spectroscopies

被引：43

作者：

Mora, Manuel ^{[1
]}

Isabel Lopez, M. ^{[1
]}

Angeles Carmona, M. ^{[1
]}

Jimenez-Sanchidrian, C. ^{[1
]}

Rafael Ruiz, J. ^{[1
]}

机构：

[1] Univ Cordoba, Dept Quim Organ, E-14071 Cordoba, Spain

来源：

POLYHEDRON | 2010年 / 29卷 / 16期

关键词：

Sepiolite; Near-infrared spectroscopy; NIR spectroscopy; MIR spectroscopy; ADSORPTION; CATALYSTS;

D O I：

10.1016/j.poly.2010.08.009

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Near-infrared (NIR) and mid-infrared (MIR) spectroscopies were used to characterize the hydroxyl groups present in a sepiolite and its calcination products at 250, 500 and 800 degrees C. Calcining the sepiolite at 250 degrees C was found to result in its dehydration through the loss of coordination water. Raising the calcination temperature to 500 degrees C caused the sepiolite structure to fold and hydroxyl groups in octahedral layers to be removed. Finally, calcination at 800 degrees C resulted in a phase change leading to enstatite, as confirmed by XRD spectroscopy. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：3046 / 3051

页数：6

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