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Thermal analysis studies of oxygen chemisorption on nanocrystalline SnO2

Published online by Cambridge University Press:  31 January 2011

C. H. Shek  and
G. M. Lin
C. H. Shek
Affiliation:
Department of Physics and Materials Science, City University of Hong Kong, Tat chee Avenue, Kowloon, Hong Kong
G. M. Lin
Affiliation:
Department of Physics and Materials Science, City University of Hong Kong, Tat chee Avenue, Kowloon, Hong Kong
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Abstract

The oxygen chemisorption on nanocrystalline SnO2 at temperature range between 100 and 450 °C was studied with differential thermal analysis (DTA) and electrical conductivity measurement. The O2−, O−, and O2m ionosorptions were observed and could be distinguished from each other only on nanocrystalline SnO2 with grain size less than 5 nm. Assuming steady-state adsorption, the heats of adsorption for O2− and O− (or O2−) on nanocrystalline SnO2 are 1.09 and 1.50 eV respectively from the results of DTA.

Type
Articles
Information
Journal of Materials Research , Volume 15 , Issue 9 , September 2000 , pp. 1994 - 1997
Copyright
Copyright © Materials Research Society 2000

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