Characterization of the structural and surface properties of chemically modified MCM-41 material

Zhao, X. S., Lu, G. Q. and Hu, X. (2000) Characterization of the structural and surface properties of chemically modified MCM-41 material. Microporous And Mesoporous Materials, 41 : 37-47.


Author(s) Zhao, X. S.
Lu, G. Q.
Hu, X.
Title Characterization of the structural and surface properties of chemically modified MCM-41 material
Journal name Microporous And Mesoporous Materials
Publication date 2000
Sub-type Article
Volume number 41
ISSN 1387-1811
Start page 37
End page 47
Total pages 11
Place of publication New York
Publisher Elsevier Science
Collection year 2000
Language eng
Subject C1
670903 Clay products
291804 Nanotechnology
250102 Chemistry of Catalysis
Abstract Mesoporous Mobil catalytic materials of number 41 (MCM-41) silica was chemically modified using both inorganic and organic precursors and characterized using the techniques, XRD, XPS, MAS NMR, FTIR, W-Vis, and physical adsorption of nitrogen, hydrocarbons (hexane, benzene, acetone, and methanol) and water vapor. Modification using organic reagents was found to result in a significant loss in porosity and a shape change of surface properties (increased hydrophobicity and decreased acidity). With inorganic modifying reagents, the decrease in porosity was also observed while the surface properties were not significantly altered as reflected by the adsorption isotherms of organics and water vapors. Chemical modifications can greatly improve the hydrothermal stability of MCM-41 material because of the enhanced surface hydrophobicity (with organic modifiers) or increased pore wall thickness (with inorganic modifiers). (C) 2000 Elsevier Science B.V. All rights reserved.
Keyword(s) Chemistry, Applied
Chemistry, Physical
Nanoscience & Nanotechnology
Materials Science, Multidisciplinary
Chemical Modification
Mcm-41
Adsorption
Surface Property
Structural Property
Modified Mesoporous Silicate
Molecular-sieves
Heterogeneous Catalysts
Pore Structure
Complexes
Stabilization
Adsorption
Silylation
Oxidation
Nmr
 
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