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Titolo:
PHOTOCATALYTIC DEGRADATION OF MONONITROPHENOL, DINITROPHENOL AND TRINITROPHENOL IN AQUEOUS TIO2 SUSPENSION
Autore:
TANAKA K; LUESAIWONG W; HISANAGA T;
Indirizzi:
NATL INST MAT & CHEM RES,HIGASHI 1-1 TSUKUBA IBARAKI JAPAN DEPT SCI SERV BANGKOK 10400 THAILAND
Titolo Testata:
Journal of molecular catalysis. A, Chemical
fascicolo: 1, volume: 122, anno: 1997,
pagine: 67 - 74
SICI:
1381-1169(1997)122:1<67:PDOMDA>2.0.ZU;2-B
Fonte:
ISI
Lingua:
ENG
Soggetto:
ORGANIC-COMPOUNDS; WATER; DECOMPOSITION; PHENOL; PHOTODEGRADATION; PHOTOCHEMISTRY; CONTAMINANTS; ENVIRONMENT; OXIDATION; POWDER;
Keywords:
PHOTOCATALYSIS; TITANIA; NITROPHENOL;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
30
Recensione:
Indirizzi per estratti:
Citazione:
K. Tanaka et al., "PHOTOCATALYTIC DEGRADATION OF MONONITROPHENOL, DINITROPHENOL AND TRINITROPHENOL IN AQUEOUS TIO2 SUSPENSION", Journal of molecular catalysis. A, Chemical, 122(1), 1997, pp. 67-74

Abstract

Three mononitrophenol compounds (2-, 3- and 4-) 2,4-dinitrophenol andpicric acid (2,4,6-trinitrophenol) were photocatalytically degraded in aqueous TiO2 suspension. Among three mononitrophenol compounds the degradation rate of 4- and 2-nitrophenol were larger than that of 5-nitrophenol. The degradation rate decreased with the number of nitro group substituents. This reactivity follows Hammett law with regard to theeffect of nitro group on phenolic functionality. Several polyhydroxylated aromatic intermediates were identified for mono- and dinitrophenol which indicated that the degradation started by the substitution of hydrogen and nitro groups by hydroxyl radical. Organic acid intermediates were identified besides aromatic compounds, among which formic andacetic acids were formed in the largest quantity. It was suggested for the transformation of nitro group that the formation ratio of NO3- and NH4+ reflected the degradation mechanism of starting nitrophenolic compound.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 26/10/20 alle ore 02:35:28