A systematic study of long-range ordered 3D-SBA-15 materials by electron tomography

Yuan, Pei, Tan, Lei, Pan, Dahai, Guo, Yanan, Zhou, Liang, Yang, Jie, Zou, Jin and Yu, Chengzhong (2011) A systematic study of long-range ordered 3D-SBA-15 materials by electron tomography. New Journal of Chemistry, Advance Article 11: 2456-2461. doi:10.1039/c1nj20146h


Author Yuan, Pei
Tan, Lei
Pan, Dahai
Guo, Yanan
Zhou, Liang
Yang, Jie
Zou, Jin
Yu, Chengzhong
Title A systematic study of long-range ordered 3D-SBA-15 materials by electron tomography
Journal name New Journal of Chemistry   Check publisher's open access policy
ISSN 1144-0546
1369-9261
Publication date 2011
Sub-type Article (original research)
DOI 10.1039/c1nj20146h
Volume Advance Article
Issue 11
Start page 2456
End page 2461
Total pages 6
Place of publication United Kingdom
Publisher Royal Society of Chemistry
Collection year 2012
Language eng
Abstract The structures of a series of 3D-SBA-15 materials have been systematically studied by X-ray diffraction (XRD), nitrogen sorption, and electron tomography (ET) techniques. All the 3D-SBA-15 materials possess an ordered 2D hexagonal mesostructure with similar cell parameters, while the pore size measured from nitrogen sorption increases with the hydrothermal treatment temperature, in some cases even larger than the cell parameter calculated from X-ray diffraction. Taking advantage of the ET technique, it is shown that there exist two types of pores in 3D-SBA-15 materials: one is the ordered channels associated with the hexagonal symmetry, and the other is locally disordered and randomly distributed merged pores. During the hydrothermal treatment events at various temperatures, the size of ordered channels changes little, while the volume fraction and the overall size of the latter type of pores increase and eventually become dominant. Thus, the attribution of the pore sizes obtained from nitrogen sorption analysis to which types of pores is synthesis condition dependent and ET is an important tool to answer this question.
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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Created: Tue, 18 Oct 2011, 16:29:58 EST by Professor Chengzhong Yu on behalf of Aust Institute for Bioengineering & Nanotechnology