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Sto¨ber silica’s microporosity Insights from thermal analysis studies
Shanshan Li;  Quan Wan;  Zonghua Qin;  Yuhong Fu;  Yuantao Gu
2019
发表期刊Journal of Thermal Analysis and Calorimetry
卷号136页码:1895–1904
摘要

Substantial knowledge gap still exists in understanding Stöber silica’s confusing microporosity. In this work, we utilized simultaneous thermal analysis coupled with Fourier transform infrared spectroscopy to characterize Stöber silica samples prepared with various post-treatments including water or ethanol washing and drying at different temperatures. The results suggest that ammonia-catalyzed ethoxylation between ethanol and silanol groups can take place during drying, and the resulting ethoxyl groups along with Si-containing oligomers may contribute to serious micropore blocking. On the other hand, water washing is effective to hydrolyze and remove these pore-blocking materials and thus enable cleared micropores. Several interesting findings including the very sharp DSC peaks, high evolving temperature of ethanol, and pyrolysis of organic matters are linked to Stöber silica’s micropores. Our work has undoubtedly improved the mechanistic understanding of Stöber silica’s microporosity and will thus facilitate the practical optimization and application of this material.

关键词Sto¨ber Silica post-treatment micropore pore Blocking ethoxylation
收录类别SCI
语种英语
文献类型期刊论文
条目标识符http://ir.gyig.ac.cn/handle/42920512-1/10587
专题矿床地球化学国家重点实验室
作者单位1.School of Chemistry and Materials Science, Guizhou Normal University, Guiyang 550001, Guizhou, China
2.State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, Guizhou, China
3.University of Chinese Academy of Sciences, Beijing 100049, China
推荐引用方式
GB/T 7714
Shanshan Li;Quan Wan;Zonghua Qin;Yuhong Fu;Yuantao Gu. Sto¨ber silica’s microporosity Insights from thermal analysis studies[J]. Journal of Thermal Analysis and Calorimetry,2019,136:1895–1904.
APA Shanshan Li;Quan Wan;Zonghua Qin;Yuhong Fu;Yuantao Gu.(2019).Sto¨ber silica’s microporosity Insights from thermal analysis studies.Journal of Thermal Analysis and Calorimetry,136,1895–1904.
MLA Shanshan Li;Quan Wan;Zonghua Qin;Yuhong Fu;Yuantao Gu."Sto¨ber silica’s microporosity Insights from thermal analysis studies".Journal of Thermal Analysis and Calorimetry 136(2019):1895–1904.
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