Paper Title:
Observation on the Structure of Ordered Mesoporous Materials at High Temperature via In Situ X-Ray Diffraction
  Abstract

This short paper reports the direct observation of the structure variation of mesoporous silica at temperatures higher than 600 oC by use of an in situ XRD technique. The mesostructure of SBA-15 or other mesoporous materials such as MCM-41 became almost invisible when the temperature rose to above 600 oC, but recovered or partially recovered once the temperature decreased. Contrarily, the characteristic XRD patterns of zeolites such as ZSM-5 kept unchangeable under the same conditions. On the basis of comparative experiments performed on various mesoporous samples, it is inferred that the reversible variation of XRD patterns probably originates from the thermal shock of the pore wall, not from the permanent collapse of the mesoscopic structure in these samples. This observation indicates the special features of SBA-15 at high temperature.

  Info
Periodical
Edited by
Jin-An Wang, Guozhong Cao and José Manuel Domínguez
Pages
29-37
DOI
10.4028/www.scientific.net/AMR.132.29
Citation
C. F. Zhou, J. H. Zhu, "Observation on the Structure of Ordered Mesoporous Materials at High Temperature via In Situ X-Ray Diffraction", Advanced Materials Research, Vol. 132, pp. 29-37, 2010
Online since
August 2010
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Price
$32.00
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