硅酸
傅里叶变换红外光谱
无定形固体
生物硅
硅酸盐
材料科学
硅
硅质
红外光谱学
吸收(声学)
吸收带
硅酸钠
硅酸铝
分析化学(期刊)
矿物学
化学
化学工程
火山
地质学
环境化学
硅藻
结晶学
有机化学
催化作用
光学
海洋学
物理
地震学
工程类
冶金
复合材料
作者
Ruth H. Ellerbrock,Mathias Stein,Jörg Schaller
标识
DOI:10.1038/s41598-022-15882-4
摘要
Abstract There is increased interest in the terrestrial silicon cycle in the last decades as its different compounds and species have large implications for ecosystem performance in terms of soil nutrient and water availability, ecosystem productivity as well as ecological aspects such as plant–microbe and plant-animal feedbacks. The currently existing analytical methods are limited. Fourier-transform infrared spectroscopy (FTIR) analysis is suggested being a promising tool to differentiate between the different Si species. We report here on the differentiation of varying Si-species/Si-binding (in synthetic material) using FTIR-analyses. Therefore, we collected FTIR-spectra of five different amorphous silica, Ca-silicate, sodium silicate (all particulate), a water-soluble fraction of amorphous silica and soil affected by volcanic activity and compared their spectra with existing data. A decrease of the internal order of the materials analyzed was indicated by peak broadening of the Si–O–Si absorption band. Peak shifts at this absorption band were induced by larger ions incorporated in the Si–O–Si network. Additionally, short-range ordered aluminosilicates (SROAS) have specific IR absorption bands such as the Si–O–Al band. Hence, SROAS and Si phases containing other ions can be distinguished from pure amorphous Si species using FTIR-analyses.
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