Structure and acidity of vanadium oxide layered on titania (anatase and rutile)

Autor:	Takashi Ohno, Tomohiro Maruoka, Takehiko Ono, Hisashi Miyata, Fumikazu Hatayama
Rok vydání:	1991
Předmět:	Anatase Chemistry Inorganic chemistry Vanadium chemistry.chemical_element Vanadium oxide chemistry.chemical_compound symbols.namesake Adsorption Rutile Monolayer Pyridine symbols Physical and Theoretical Chemistry Raman spectroscopy
Zdroj:	Journal of the Chemical Society, Faraday Transactions. 87:2629
ISSN:	1364-5455 0956-5000
Popis:	The adsorption of pyridine on, and the structure of, two series of V2O5/TiO2(anatase and rutile) samples, prepared by the gas-phase method (1.2–3.4 wt.%), have been studied. V–Ti oxides show both Bronsted- and Lewis-acidic sites. The Bronsted sites increases with increasing vanadium loadings. The number of Lewis sites on the anatase samples is greater than on the rutile form. From Raman and in situ FTIR studies the vanadium oxides on both series are composed mainly of surface vanadia species. These are stable during heat treatment at 673 K. The VO character of a monolayer rutile sample is different from that of a monolayer anatase sample, and resembles that of multilayer samples.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::5c796d475e26e8b167d87a3e15174b81 https://doi.org/10.1039/ft9918702629 Zobrazit plný text záznamu