Title
Synthesis and characterization of catalytic metal semiconductor-doped siliceous materials with ordered structure for chemical sensoring Synthesis and characterization of catalytic metal semiconductor-doped siliceous materials with ordered structure for chemical sensoring
Author
Faculty/Department
Faculty of Sciences. Chemistry
Publication type
article
Publication
Boston, Mass. :Kluwer Academic ,
Subject
Physics
Chemistry
Source (journal)
Journal of porous materials. - Boston, Mass.
Volume/pages
20(2013) :5 , p. 1119-1128
ISSN
1380-2224
1380-2224
ISI
000324103300016
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
Sensing materials based on doped mesoporous silica of SBA-15 type were obtained by repeated wet impregnation of the solid with semiconductive oxides (Sn and In) and noble metal (Pt). The mesoporous structure of SBA was preserved during the doping and calcination of the solid, although slight pore size narrowing occurred as shown by the BET adsorption analysis. The solid was deposited by the casting technique as a thin layer on a finger structure. The modifications of its electrical resistance values in the presence of hydrogen and propene (50400 ppm), at temperature values of 450 °C was used as sensing parameter, in the presence of propene and hydrogen. The sensitivity to propene was higher than that to hydrogen.
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