Direct Observation of Plugs and Intrawall Pores in SBA-15 Using Low Voltage High Resolution Scanning Electron Microscopy and the Influence of Solvent Properties on Plug-Formation
(2013) In Chemistry of Materials 25(20). p.4105-4112- Abstract
- Through the use of low voltage high resolution scanning electron microscopy (LV-HRSEM) we have studied the fine details of the intricate pore structure of SBA-15. Intrawall pores and deviations from the ideal and uniform cylindrical pores are clearly observed, and we report for the first time the direct observation of "plugs" in the pores. N-2-sorption measurements confirm their existence. LV-HRSEM provides an opportunity to quantify the frequency of occurrence of plugs within the pore structure. The rate of mesophase formation, followed with in situ small angle X-ray scattering (SAXS) under different solvent conditions, is shown to have a significant influence on the development of plugs and how frequently they occur. We suggest a... (More)
- Through the use of low voltage high resolution scanning electron microscopy (LV-HRSEM) we have studied the fine details of the intricate pore structure of SBA-15. Intrawall pores and deviations from the ideal and uniform cylindrical pores are clearly observed, and we report for the first time the direct observation of "plugs" in the pores. N-2-sorption measurements confirm their existence. LV-HRSEM provides an opportunity to quantify the frequency of occurrence of plugs within the pore structure. The rate of mesophase formation, followed with in situ small angle X-ray scattering (SAXS) under different solvent conditions, is shown to have a significant influence on the development of plugs and how frequently they occur. We suggest a mechanism explaining the existence of the plugs, providing means for a better understanding and control over material properties. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/4212755
- author
- Kjellman, Tomas LU ; Asahina, Shunsuke ; Schmitt, Julien ; Imperor-Clerc, Marianne ; Terasaki, Osamu and Alfredsson, Viveka LU
- organization
- publishing date
- 2013
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- SBA-15, plugs, LV-HRSEM, intrawall pores, pore structure, in situ SAXS, N-2-sorption
- in
- Chemistry of Materials
- volume
- 25
- issue
- 20
- pages
- 4105 - 4112
- publisher
- The American Chemical Society (ACS)
- external identifiers
-
- wos:000326209200021
- scopus:84886653102
- ISSN
- 0897-4756
- DOI
- 10.1021/cm402635m
- language
- English
- LU publication?
- yes
- id
- 4e2395ef-f5a0-42c8-a39a-79af8642cffa (old id 4212755)
- date added to LUP
- 2016-04-01 10:05:35
- date last changed
- 2023-09-27 17:12:24
@article{4e2395ef-f5a0-42c8-a39a-79af8642cffa, abstract = {{Through the use of low voltage high resolution scanning electron microscopy (LV-HRSEM) we have studied the fine details of the intricate pore structure of SBA-15. Intrawall pores and deviations from the ideal and uniform cylindrical pores are clearly observed, and we report for the first time the direct observation of "plugs" in the pores. N-2-sorption measurements confirm their existence. LV-HRSEM provides an opportunity to quantify the frequency of occurrence of plugs within the pore structure. The rate of mesophase formation, followed with in situ small angle X-ray scattering (SAXS) under different solvent conditions, is shown to have a significant influence on the development of plugs and how frequently they occur. We suggest a mechanism explaining the existence of the plugs, providing means for a better understanding and control over material properties.}}, author = {{Kjellman, Tomas and Asahina, Shunsuke and Schmitt, Julien and Imperor-Clerc, Marianne and Terasaki, Osamu and Alfredsson, Viveka}}, issn = {{0897-4756}}, keywords = {{SBA-15; plugs; LV-HRSEM; intrawall pores; pore structure; in situ SAXS; N-2-sorption}}, language = {{eng}}, number = {{20}}, pages = {{4105--4112}}, publisher = {{The American Chemical Society (ACS)}}, series = {{Chemistry of Materials}}, title = {{Direct Observation of Plugs and Intrawall Pores in SBA-15 Using Low Voltage High Resolution Scanning Electron Microscopy and the Influence of Solvent Properties on Plug-Formation}}, url = {{http://dx.doi.org/10.1021/cm402635m}}, doi = {{10.1021/cm402635m}}, volume = {{25}}, year = {{2013}}, }