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Comparing amorphous silica, short-range-ordered silicates and silicic acid species by FTIR

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 p...

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Autores principales: Ellerbrock, Ruth, Stein, Mathias, Schaller, Jörg
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9271067/
https://www.ncbi.nlm.nih.gov/pubmed/35810178
http://dx.doi.org/10.1038/s41598-022-15882-4
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author Ellerbrock, Ruth
Stein, Mathias
Schaller, Jörg
author_facet Ellerbrock, Ruth
Stein, Mathias
Schaller, Jörg
author_sort Ellerbrock, Ruth
collection PubMed
description 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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spelling pubmed-92710672022-07-11 Comparing amorphous silica, short-range-ordered silicates and silicic acid species by FTIR Ellerbrock, Ruth Stein, Mathias Schaller, Jörg Sci Rep Article 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. Nature Publishing Group UK 2022-07-09 /pmc/articles/PMC9271067/ /pubmed/35810178 http://dx.doi.org/10.1038/s41598-022-15882-4 Text en © The Author(s) 2022 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Article
Ellerbrock, Ruth
Stein, Mathias
Schaller, Jörg
Comparing amorphous silica, short-range-ordered silicates and silicic acid species by FTIR
title Comparing amorphous silica, short-range-ordered silicates and silicic acid species by FTIR
title_full Comparing amorphous silica, short-range-ordered silicates and silicic acid species by FTIR
title_fullStr Comparing amorphous silica, short-range-ordered silicates and silicic acid species by FTIR
title_full_unstemmed Comparing amorphous silica, short-range-ordered silicates and silicic acid species by FTIR
title_short Comparing amorphous silica, short-range-ordered silicates and silicic acid species by FTIR
title_sort comparing amorphous silica, short-range-ordered silicates and silicic acid species by ftir
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9271067/
https://www.ncbi.nlm.nih.gov/pubmed/35810178
http://dx.doi.org/10.1038/s41598-022-15882-4
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