Title
The creation of hydrophobic, stable MCM-48/VO<tex>$_{x}$</tex> catalysts, using alkylchlorosilanes as coupling agents for the deposition of VO<tex>$_{x}$</tex> surface structures The creation of hydrophobic, stable MCM-48/VO<tex>$_{x}$</tex> catalysts, using alkylchlorosilanes as coupling agents for the deposition of VO<tex>$_{x}$</tex> surface structures
Author
Faculty/Department
Faculty of Sciences. Chemistry
Publication type
conferenceObject
Publication
Singapore :World Scientific, [*]
Subject
Physics
Chemistry
Engineering sciences. Technology
Source (book)
2nd Pacific Basin Conference on Adsorption Science and Technology, May 14-18, 2000, Brisbane, Australia
ISBN
981-02-4263-8
ISI
000165694900129
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
The use of dimethyldichlorosilane as I coupling agent for the grafting of VOx structures on the MCM-48 surface, produces a material that is simultaneously hydrophobic (immiscible with water) and very active (all V-centers are accessible). The VOx surface species are grafted by the Molecular Designed Dispersion of VO(acac)2 on the silylated surface, followed by calcination in air at 450 degreesC. These hydrophobic MCM-48 supported VOx catalysts are stable up to 500 degreesC and shaw a dramatic reduction in the leaching of the V-centers in aqueous media. Also the structural stability has improved enormously. The crystallinity of the materials does not decrease significantly, not even when the samples are subjected to a hydrothermal treatment at 160 degreesC and 6.1 atm. pressure.
E-info
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