FTIR spectroscopy study of the structure changes of palygorskite under heating
FTIR spectroscopy study of the structure changes of palygorskite under heating
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傅里叶变换红外光谱研究坡缕石受热结构变化
DOI：
10.1016/j.saa.2012.07.085
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发表时间：
2012-11-01
影响因子：
4.4
通讯作者：
Chen, Ming
中科院分区：
文献类型：
--
作者：
Yan, Wenchang;Liu, Dong;Chen, Ming
对坡缕石进行渐进热处理，利用傅里叶变换红外光谱法监测其红外振动位置和强度的变化，特别是在低波数区。此外，还研究了坡齿石中杂质在加热条件下的反应。Palygorskite在1196和647 cm（-1）处有两个条带，这两个条带分别是连接相邻逆SiO4四面体的Si-O-Si基团的不对称拉伸振动和通道边缘MgO6八面体中的H2O-Mg-H2O拉伸振动。在大约680 cm（-1）处的波段是Si-O-Mg和Si-O-Al （VI）的重叠对称伸缩振动。865 cm（-1）波段对应于非晶碳酸盐杂质。(C) 2012 Elsevier B.V.版权所有
Progressive heat treatment was applied to palygorskite, and the changes of the position and intensity of its infrared vibrations, particularly those in the low wavenumber region, were monitored by use of Fourier transform infrared spectroscopy. Moreover, the responses of the impurities in palygorskite under heating were also examined. Palygorskite is characterized by two bands at 1196 and 647 cm(-1), which are attributed to the asymmetric stretching vibration of the Si-O-Si group that connects the adjacent inverse SiO4 tetrahedrons and the H2O-Mg-H2O stretching vibration in the MgO6 octahedra at the edges of the channels, respectively. The band at approximately 680 cm(-1) is attributed to the overlapping symmetric stretching vibrations of Si-O-Mg and Si-O-Al (VI). In addition, the 865 cm(-1) band corresponds to the amorphous carbonate impurity. (C) 2012 Elsevier B.V. All rights reserved.