O-xylene oxidation on V2O5 - TiO2 oxide system
1984; Elsevier BV; Volume: 10; Issue: 2 Linguagem: Inglês
10.1016/0166-9834(84)80095-0
ISSN1873-3867
AutoresM. Rusiecka, B. Grzybowska, M. Ga ̧sior,
Tópico(s)Transition Metal Oxide Nanomaterials
ResumoThe ESR spectra of V2O5 deposited in different quantities on the surface of anatase or rutile modification of TiO2 have been registered. The reduced vanadia on both TiO2 modifications is present in the form of (V=O)2+ groups dispersed on the TiO2 surface and V4+ ions in V2O5 phase. (V=O)2+ groups on anatase containing samples are densely placed, and resistant to oxidation in an oxygen atmosphere. Those on rutile are more scarcely dispersed and are, in contrast to anatase samples, easily oxidized. Comparison of total reduction degree with that determined by the ESR method suggests, moreover, the presence of lower vanadium oxides on rutile containing samples.
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