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Titolo:
Photochemistry of methanol and methoxy groups adsorbed on powdered TiO2
Autore:
Chuang, CC; Chen, CC; Lin, JL;
Indirizzi:
Natl Cheng Kung Univ, Dept Chem, Tainan 70101, Taiwan Natl Cheng Kung Univ Tainan Taiwan 70101 Dept Chem, Tainan 70101, Taiwan
Titolo Testata:
JOURNAL OF PHYSICAL CHEMISTRY B
fascicolo: 13, volume: 103, anno: 1999,
pagine: 2439 - 2444
SICI:
1520-6106(19990401)103:13<2439:POMAMG>2.0.ZU;2-0
Fonte:
ISI
Lingua:
ENG
Soggetto:
TITANIUM-DIOXIDE; HETEROGENEOUS PHOTOCATALYSIS; ALIPHATIC-ALCOHOLS; AQUEOUS-SOLUTIONS; ADSORPTION; PHOTOOXIDATION; CATALYSTS; OXIDATION; SURFACE; SPECTROSCOPY;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
28
Recensione:
Indirizzi per estratti:
Indirizzo: Lin, JL Natl Cheng Kung Univ, Dept Chem, 1 Ta Hsueh Rd, Tainan 70101, Taiwan Natl Cheng Kung Univ 1 Ta Hsueh Rd Tainan Taiwan 70101 01, Taiwan
Citazione:
C.C. Chuang et al., "Photochemistry of methanol and methoxy groups adsorbed on powdered TiO2", J PHYS CH B, 103(13), 1999, pp. 2439-2444

Abstract

The photochemistry of CH3OH(a) and CH3O(a) adsorbed on TiO2 and the effectuf O-2 have been studied by infrared spectroscopy and mass spectrometry. In the absence of O-2, CH3OH(a) desorbs molecularly, while CH3O(a) decomposes to form CH2O(g) under UV irradiation. The rate of CH3O(a) decomposition reaches maximum in the initial stage of UV irradiation and then decreases significantly. On the other hand, for the reaction in O-2, the behavior of CH3O(a) depletion upon UV irradiation is very different, giving rise to adsorbed HCOO(a) and H2O(a). A radical mechanism is proposed to explain the variation of CH3O(a) depletion upon UV irradiation, the role of O-2, and the formation of the reaction products.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 10/04/20 alle ore 01:53:49