ROLE OF OXYGEN VACANCIES IN WATER-VAPOR CHEMISORPTION AND CO OXIDATION ON TITANIA

Authors
SENGUPTA G CHATTERJEE RN MAITY GC ANSARI BJ SATYANARAYNA CVV
Citation
G. Sengupta et al., ROLE OF OXYGEN VACANCIES IN WATER-VAPOR CHEMISORPTION AND CO OXIDATION ON TITANIA, Journal of colloid and interface science, 170(1), 1995, pp. 215-219
Citations number
15
Categorie Soggetti
Chemistry Physical
Journal title
Journal of colloid and interface science → ACNP
ISSN journal
00219797
Volume
170
Issue
1
Year of publication
1995
Pages
215 - 219
Database
ISI
SICI code
0021-9797(1995)170:1<215:ROOVIW>2.0.ZU;2-0
Abstract
Titanium dioxide is widely used as support for various important catal ysts. Although nonstoichiometric titania behaves as an n-type semicond uctor, the nature of the defect sites is not yet fully understood. In the present investigation the water vapor adsorption and carbon monoxi de oxidation on TiO2 is explained considering oxygen vacancies as the major defect. It is also shown that incorporation of an Al3+ ion in Ti O2 reduces the concentration of oxygen ion vacancies and inhibits the transformation of anatase to rutile. (C) 1995 Academic Press, Inc.