Journal
CATALYSIS SURVEYS FROM ASIA
Volume 8, Issue 2, Pages 127-135Publisher
SPRINGER/PLENUM PUBLISHERS
DOI: 10.1023/B:CATS.0000027014.79515.87
Keywords
nano-crystallite; ordered mesopore; ordered macropore; tin dioxide; titanium dioxide; semiconductor gas sensors
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The present article reviews our latest studies directed to improving gas sensing properties of semiconductor metal oxides, SnO2 and TiO2, by controlling their porous structure in the range of nano- to micro-meter size. Thermally stable mesoporous oxide powders and submicron-size porous thick films were fabricated by a templating method employing supramolecular surfactants or polymethylmethacrylate microspheres and also by a sol - gel process in a polyethylene glycol matrix. Advantages of these methods in improving the sensing properties are overviewed and then remaining problems are discussed.
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