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Titolo:
Photocatalyzed oxidation of alcohols and organochlorides in the presence of native TiO2 and metallized TiO2 suspensions. Part (I): Photocatalytic activity and pH influence
Autore:
Chen, J; Ollis, DF; Rulkens, WH; Bruning, H;
Indirizzi:
Wageningenndsiv Agr, Dept Environm Technol, NL-6700 EV Wageningen, Netherla Wageningen Univ Agr Wageningen Netherlands NL-6700 EV geningen, Netherla N Carolina State Univ, Dept Chem Engn, Raleigh, NC 27695 USA N Carolina State Univ Raleigh NC USA 27695 em Engn, Raleigh, NC 27695 USA
Titolo Testata:
WATER RESEARCH
fascicolo: 3, volume: 33, anno: 1999,
pagine: 661 - 668
SICI:
0043-1354(199902)33:3<661:POOAAO>2.0.ZU;2-H
Fonte:
ISI
Lingua:
ENG
Soggetto:
TITANIUM-DIOXIDE; SEMICONDUCTOR PARTICLES; HYDROGEN-PRODUCTION; ALIPHATIC-ALCOHOLS; ORGANIC-COMPOUNDS; PLATINIZED TIO2; ACETIC-ACID; WATER; DECOMPOSITION; POWDER;
Keywords:
photocatalysis; photochemical; advanced oxidation; alcohols; organochlorides; organic contaminant oxidation; metallized TiO2; pH influence; environmental technology;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
25
Recensione:
Indirizzi per estratti:
Indirizzo: Chen, J Wageningen,Univ Agr, Dept Environm Technol, POB 8129, NL-6700 EV Wageningen Wageningen Univ Agr POB 8129 Wageningen Netherlands NL-6700 EV en
Citazione:
J. Chen et al., "Photocatalyzed oxidation of alcohols and organochlorides in the presence of native TiO2 and metallized TiO2 suspensions. Part (I): Photocatalytic activity and pH influence", WATER RES, 33(3), 1999, pp. 661-668

Abstract

Photocatalytic oxidations of methanol, ethanol and chloroform, trichloroethylene (TCE), and dichloropropionic acid (DCP) in M/TiO2 aqueous slurries are studied. In the presence of oxygen, the intermediates of methanol oxidation, such as formaldehyde: and formic acid, were not detected by GC in the slurries of TiO2, Pt/TiO2, or Pd/TiO2, and CO2 was the only product detected. The distribution of intermediates for ethanol photocatalytic oxidation varies with different catalysts: under the same reaction conditions, the ratio of acetaldehyde:acetic acid is 30:1 on TiO2, and 0.23:1 on Pt/TiO2, withthe acetaldehyde concentration being 130 limes higher or. TiO2 than on Pt/TiO2. Thus, a further oxidation is achieved easily on the Pt/TiO2. The CO2 production depends on the initial reaction pH: Acidic pH produces CO2 immediately in alcohol oxidation, but alkaline pH retards the mineralization substantially. Little effect of Pd metallization on TiO2 was observed for photocatalytic oxidation of chloroform, TCE or DCP. Pt/TiO2 only enhances DCP dechlorination and has no effect on its decarboxylation. (C) 1998 Elsevier Science Ltd. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 29/03/20 alle ore 13:48:25