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

被引：6

作者：

Marchewka, Jakub ^{[1
]}

Jelen, Piotr ^{[1
]}

Rutkowska, Izabela ^{[1
]}

Bezkosty, Patryk ^{[1
]}

Sitarz, Maciej ^{[1
]}

机构：

[1] AGH Univ Sci & Technol, Fac Mat Sci & Ceram, Al Mickiewicza 30, PL-30059 Krakow, Poland

来源：

MATERIALS | 2021年 / 14卷 / 06期

关键词：

silsesquioxanes; silicon oxycarbide; porous ceramics; sol-gel synthesis;

D O I：

10.3390/ma14061340

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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.

引用

页数：12

共 62 条

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