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Titolo:
ORIENTATION DEPENDENCE OF PHOTOCHEMICAL-REACTIONS ON TIO2 SURFACES
Autore:
HOTSENPILLER PAM; BOLT JD; FARNETH WE; LOWEKAMP JB; ROHRER GS;
Indirizzi:
DUPONT CO INC,EXPT STN WILMINGTON DE 19880 CARNEGIE MELLON UNIV,DEPT MAT SCI & ENGN PITTSBURGH PA 15213
Titolo Testata:
JOURNAL OF PHYSICAL CHEMISTRY B
fascicolo: 17, volume: 102, anno: 1998,
pagine: 3216 - 3226
SICI:
1089-5647(1998)102:17<3216:ODOPOT>2.0.ZU;2-N
Fonte:
ISI
Lingua:
ENG
Soggetto:
SPACE-CHARGE SEGREGATION; SINGLE-CRYSTAL SURFACES; TITANIUM-DIOXIDE; PHOTOCATALYTIC OXIDATION; ALIPHATIC-ALCOHOLS; ORGANIC-MOLECULES; GRAIN-BOUNDARIES; TRICHLOROETHYLENE; PARTICLES; PHOTOACTIVITY;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
57
Recensione:
Indirizzi per estratti:
Citazione:
P.A.M. Hotsenpiller et al., "ORIENTATION DEPENDENCE OF PHOTOCHEMICAL-REACTIONS ON TIO2 SURFACES", JOURNAL OF PHYSICAL CHEMISTRY B, 102(17), 1998, pp. 3216-3226

Abstract

The photochemistry of oriented rutile surfaces has been examined using the photoreduction of Ag+ to Ag metal from an aqueous solution onto the TiO2 surfaces. The photochemical reaction rates and quantum yieldsof rutile films were found to be a function of the orientation of therutile surface. The (100) and (110) rutile orientations have lower photoreduction rates than the (101), (111), and (001). This dependence of the photochemical reaction rates on film surface orientation is observed over a range of light intensities, illumination wavelengths, and film thicknesses. Atomic force microscopy has been used to characterize the morphologies of the film surfaces and the photoreduced Ag at these surfaces. Several properties of rutile! such as the surface morphology, surface chemistry, space charge phenomena, and charge transport, are discussed in relation to their possible contributions to the orientation dependence of the photochemistry on the rutile films.

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Documento generato il 01/04/20 alle ore 11:43:12