Chemical Structure and Microstructure Characterization of Ladder-Like Silsesquioxanes Derived Porous Silicon Oxycarbide Materials

The aim of this work was to synthesize porous ceramic materials from the SiOC system by the sol-gel method and the subsequent pyrolysis. The usage of two types of precursors (siloxanes) was determined by Si/C ratio in starting materials. It allows us to control the size of the pores and specific sur...

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Main Authors: Jakub Marchewka, Piotr Jeleń, Izabela Rutkowska, Patryk Bezkosty, Maciej Sitarz
Format: Article
Language:English
Published: MDPI AG 2021-03-01
Series:Materials
Subjects:
Online Access:https://www.mdpi.com/1996-1944/14/6/1340
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spelling doaj-7c1f30ba6a15478ba011035598d6a4c72021-03-11T00:05:02ZengMDPI AGMaterials1996-19442021-03-01141340134010.3390/ma14061340Chemical Structure and Microstructure Characterization of Ladder-Like Silsesquioxanes Derived Porous Silicon Oxycarbide MaterialsJakub Marchewka0Piotr Jeleń1Izabela Rutkowska2Patryk Bezkosty3Maciej Sitarz4Faculty of Material Science and Ceramics, AGH University of Science and Technology, al. Mickiewicza 30, 30-059 Kraków, PolandFaculty of Material Science and Ceramics, AGH University of Science and Technology, al. Mickiewicza 30, 30-059 Kraków, PolandFaculty of Material Science and Ceramics, AGH University of Science and Technology, al. Mickiewicza 30, 30-059 Kraków, PolandFaculty of Material Science and Ceramics, AGH University of Science and Technology, al. Mickiewicza 30, 30-059 Kraków, PolandFaculty of Material Science and Ceramics, AGH University of Science and Technology, al. Mickiewicza 30, 30-059 Kraków, PolandThe aim of this work was to synthesize porous ceramic materials from the SiOC system by the sol-gel method and the subsequent pyrolysis. The usage of two types of precursors (siloxanes) was determined by Si/C ratio in starting materials. It allows us to control the size of the pores and specific surface area, which are crucial for the potential applications of the final product after thermal processing. Methyltrimethoxysilane and dimethyldiethoxysilane were mixed in three different molar ratios: 4:1, 2:1, and 1:1 to emphasize Si/C ratio impact on silicon oxycarbide glasses properties. Structure and microstructure were examined both for xerogels and obtained silicon oxycarbide materials. Brunauer-Emmett-Teller (BET) analysis was performed to confirm that obtained materials are porous and Si/C ratio in siloxanes precursors affects porosity and specific surface area. This kind of porous ceramics could be potentially applied as gas sensors in high temperatures, catalyst supports, filters, adsorbents, or advanced drug delivery systems.https://www.mdpi.com/1996-1944/14/6/1340silsesquioxanessilicon oxycarbideporous ceramicssol-gel synthesis
collection DOAJ
language English
format Article
sources DOAJ
author Jakub Marchewka
Piotr Jeleń
Izabela Rutkowska
Patryk Bezkosty
Maciej Sitarz
spellingShingle Jakub Marchewka
Piotr Jeleń
Izabela Rutkowska
Patryk Bezkosty
Maciej Sitarz
Chemical Structure and Microstructure Characterization of Ladder-Like Silsesquioxanes Derived Porous Silicon Oxycarbide Materials
Materials
silsesquioxanes
silicon oxycarbide
porous ceramics
sol-gel synthesis
author_facet Jakub Marchewka
Piotr Jeleń
Izabela Rutkowska
Patryk Bezkosty
Maciej Sitarz
author_sort Jakub Marchewka
title Chemical Structure and Microstructure Characterization of Ladder-Like Silsesquioxanes Derived Porous Silicon Oxycarbide Materials
title_short Chemical Structure and Microstructure Characterization of Ladder-Like Silsesquioxanes Derived Porous Silicon Oxycarbide Materials
title_full Chemical Structure and Microstructure Characterization of Ladder-Like Silsesquioxanes Derived Porous Silicon Oxycarbide Materials
title_fullStr Chemical Structure and Microstructure Characterization of Ladder-Like Silsesquioxanes Derived Porous Silicon Oxycarbide Materials
title_full_unstemmed Chemical Structure and Microstructure Characterization of Ladder-Like Silsesquioxanes Derived Porous Silicon Oxycarbide Materials
title_sort chemical structure and microstructure characterization of ladder-like silsesquioxanes derived porous silicon oxycarbide materials
publisher MDPI AG
series Materials
issn 1996-1944
publishDate 2021-03-01
description The aim of this work was to synthesize porous ceramic materials from the SiOC system by the sol-gel method and the subsequent pyrolysis. The usage of two types of precursors (siloxanes) was determined by Si/C ratio in starting materials. It allows us to control the size of the pores and specific surface area, which are crucial for the potential applications of the final product after thermal processing. Methyltrimethoxysilane and dimethyldiethoxysilane were mixed in three different molar ratios: 4:1, 2:1, and 1:1 to emphasize Si/C ratio impact on silicon oxycarbide glasses properties. Structure and microstructure were examined both for xerogels and obtained silicon oxycarbide materials. Brunauer-Emmett-Teller (BET) analysis was performed to confirm that obtained materials are porous and Si/C ratio in siloxanes precursors affects porosity and specific surface area. This kind of porous ceramics could be potentially applied as gas sensors in high temperatures, catalyst supports, filters, adsorbents, or advanced drug delivery systems.
topic silsesquioxanes
silicon oxycarbide
porous ceramics
sol-gel synthesis
url https://www.mdpi.com/1996-1944/14/6/1340
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AT patrykbezkosty chemicalstructureandmicrostructurecharacterizationofladderlikesilsesquioxanesderivedporoussiliconoxycarbidematerials
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