Deformation of Ordered Mesoporous Silica Structures on Exposure to High Temperatures
Joint Authors
Lowe, John B.
Baker, Richard T.
Source
Issue
Vol. 2014, Issue 2014 (31 Dec. 2014), pp.1-13, 13 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2014-09-15
Country of Publication
Egypt
No. of Pages
13
Main Subjects
Abstract EN
Ordered mesoporous silica materials are of interest for a wide range of applications.
In many of these, elevated temperatures are used either in the preparation of the material or during its use.
Therefore, an understanding of the effect of high temperature treatments on these materials is desirable.
In this work, a detailed structural study is performed on silicas with three representative pore structures: a 2-D hexagonal pore arrangement (SBA-15), a continuous 3D cubic bimodal pore structure (KIT-6), and a 3D large cage pore structure (FDU-12).
Each silica is studied as prepared and after treatment at a series of temperatures between 300 and 900°C.
Pore structures are imaged using Transmission Electron Microscopy.
This technique is used in conjunction with Small-Angle X-ray Diffraction, gas physisorption, and 29Si solid state Nuclear Magnetic Resonance.
Using these techniques, the pore size distributions, the unit cell dimensions of the mesoporous structures, and the relative occupancy of the distinct chemical environments of Si within them are cross correlated for the three silicas and their evolution with treatment temperature is elucidated.
The physical and chemical properties before, during, and after collapse of these structures at high temperatures are described as are the differences in behavior between the three silica structures.
American Psychological Association (APA)
Lowe, John B.& Baker, Richard T.. 2014. Deformation of Ordered Mesoporous Silica Structures on Exposure to High Temperatures. Journal of Nanomaterials،Vol. 2014, no. 2014, pp.1-13.
https://search.emarefa.net/detail/BIM-1041868
Modern Language Association (MLA)
Lowe, John B.& Baker, Richard T.. Deformation of Ordered Mesoporous Silica Structures on Exposure to High Temperatures. Journal of Nanomaterials No. 2014 (2014), pp.1-13.
https://search.emarefa.net/detail/BIM-1041868
American Medical Association (AMA)
Lowe, John B.& Baker, Richard T.. Deformation of Ordered Mesoporous Silica Structures on Exposure to High Temperatures. Journal of Nanomaterials. 2014. Vol. 2014, no. 2014, pp.1-13.
https://search.emarefa.net/detail/BIM-1041868
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1041868