A silanol protection mechanism: Understanding the decomposition behavior of surfactants in mesostructured solids

Pan, Dahai, Zhao, Lingzhi, Qian, Kun, Tan, Lei, Zhou, Liang, Zhang, Jun, Huang, Xiaodan, Fan, Yu, Liu, Haiyan, Yu, Chengzhong and Bao, Xiaojun (2011) A silanol protection mechanism: Understanding the decomposition behavior of surfactants in mesostructured solids. Journal of Materials Research, 26 6: 804-814. doi:10.1557/jmr.2010.98


Author Pan, Dahai
Zhao, Lingzhi
Qian, Kun
Tan, Lei
Zhou, Liang
Zhang, Jun
Huang, Xiaodan
Fan, Yu
Liu, Haiyan
Yu, Chengzhong
Bao, Xiaojun
Title A silanol protection mechanism: Understanding the decomposition behavior of surfactants in mesostructured solids
Journal name Journal of Materials Research   Check publisher's open access policy
ISSN 0884-2914
1092-8928
2044-5326
Publication date 2011-03-28
Sub-type Article (original research)
DOI 10.1557/jmr.2010.98
Volume 26
Issue 6
Start page 804
End page 814
Total pages 11
Place of publication New York, NY, U.S.A.
Publisher Cambridge University Press
Collection year 2012
Language eng
Formatted abstract The decomposition mechanism of block copolymer templates inside as-synthesized mesostructured solids has been systematically studied using solid-state 1H magic angle spinning nuclear magnetic resonance spectroscopy, thermogravimetric analysis, and high-vacuum Fourier transform infrared spectrometry. It is shown that there exists hydrogen-bonding interaction between silanols and block copolymers at the inorganic–organic interface in the self-assembled as-synthesized mesostructured solids, which plays an important role in protecting the surfactants against decomposition during the high-temperature hydrothermal treatment process. Increasing silanol concentration can enhance the hydrogen-bonding interaction and thus shows better “protection” effect. Moreover, the thermal decomposition of the block copolymer in as-synthesized mesostructured solids in air commences at higher temperatures compared with that in acidic solution or in air, providing further evidence in support of the silanol protection mechanism.
Keyword Mesoporous molecular-sieves
Silica materials
High-temperature
Copolymer template
Material SBA-15
Triblock
Catalysis
Thermogravimetry
Calcination
Mixtures
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2012 Collection
Australian Institute for Bioengineering and Nanotechnology Publications
 
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