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Titolo:
Photocatalytic activities of pure rutile particles isolated from TiO2 powder by dissolving the anatase component in HF solution
Autore:
Ohno, T; Sarukawa, K; Matsumura, M;
Indirizzi:
Osaka Univ, Res Ctr Photoenerget Organ Mat, Toyonaka, Osaka 5608531, JapanOsaka Univ Toyonaka Osaka Japan 5608531 t, Toyonaka, Osaka 5608531, Japan
Titolo Testata:
JOURNAL OF PHYSICAL CHEMISTRY B
fascicolo: 12, volume: 105, anno: 2001,
pagine: 2417 - 2420
SICI:
1520-6106(20010329)105:12<2417:PAOPRP>2.0.ZU;2-0
Fonte:
ISI
Lingua:
ENG
Soggetto:
TITANIUM-DIOXIDE; OXYGEN REDUCTION; WATER; OXIDATION; HYDROGEN; PHOTODECOMPOSITION; DEGRADATION; METHANOL; ELECTRON;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
28
Recensione:
Indirizzi per estratti:
Indirizzo: Matsumura, M Osaka Univ, Res Ctr Photoenerget Organ Mat, 1-3 Machikaneyama, Toyonaka, Osaka 5608531, Japan Osaka Univ 1-3 Machikaneyama Toyonaka Osaka Japan 5608531 pan
Citazione:
T. Ohno et al., "Photocatalytic activities of pure rutile particles isolated from TiO2 powder by dissolving the anatase component in HF solution", J PHYS CH B, 105(12), 2001, pp. 2417-2420

Abstract

We have found that anatase TiO2 dissolves into an HF solution more easily than rutile TiO2, Using this property, we succeeded in isolating pure rutile particles from TiO2 powder consisting of rutile and anatase phases by theHF treatment. The isolation of pure rutile particles was confirmed by X-ray diffraction patterns and diffuse reflection spectra. The rutile particle showed much lower photocatalytic activity than the original powder, if compared for the oxidation of 2-propanol in aqueous solution using dissolved oxygen as the electron acceptor. On the other hand, when Fe(III) ions were used as the electron acceptor for oxidation of 2-propanol and water, the activity scarcely changed after the HF treatment. These results indicate that rutile TiO2 has poor activity for the reduction of oxygen, and the presence of a small amount of an anatase component is crucial for an efficient photocatalytic reaction on TiO2 particles using oxygen as the electron acceptor.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 02/10/20 alle ore 01:46:34