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Titolo:
Mechanistic examination of the titania photocatalyzed oxidation of ethanolamines
Autore:
Horikoshi, S; Watanabe, N; Mukae, M; Hidaka, H; Serpone, N;
Indirizzi:
Meisei Univ, Frontier Res Ctr Global Environm Protect, Hino, Tokyo 1918506, Japan Meisei Univ Hino Tokyo Japan 1918506 Protect, Hino, Tokyo 1918506, Japan Concordia Univ, Dept Chem & Biochem, Montreal, PQ H3G 1M8, Canada Concordia Univ Montreal PQ Canada H3G 1M8 m, Montreal, PQ H3G 1M8, Canada
Titolo Testata:
NEW JOURNAL OF CHEMISTRY
fascicolo: 8, volume: 25, anno: 2001,
pagine: 999 - 1005
SICI:
1144-0546(2001)25:8<999:MEOTTP>2.0.ZU;2-7
Fonte:
ISI
Lingua:
ENG
Soggetto:
ORGANIC-COMPOUNDS; AMINO-ACIDS; IONS; TIO2; NITROBENZENE; DEGRADATION; INTERFACE; BENZAMIDE; AMMONIUM; NITRATE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
11
Recensione:
Indirizzi per estratti:
Indirizzo: Hidaka, H Meisei Univ, Frontier Res Ctr Global Environm Protect, 2-1-1 Hodokubo, Hino, Tokyo 1918506, Japan Meisei Univ 2-1-1 Hodokubo Hino Tokyo Japan 1918506 18506, Japan
Citazione:
S. Horikoshi et al., "Mechanistic examination of the titania photocatalyzed oxidation of ethanolamines", NEW J CHEM, 25(8), 2001, pp. 999-1005

Abstract

In this study we focus on elucidating the mechanism of the photocatalyzed transformation of the primary, secondary and tertiary amines found in ethanolamine, diethanolamine and triethanolamine when present in illuminated aqueous titania dispersions. Photodecomposition of these ethanolamines leads to the evolution of CO2 through prior formation of various intermediate species. Ammonium (NH4+) and nitrate ions (NO3-) are the ultimate products formed in the photoconversion of the amine nitrogen atoms, with NH4+ cations produced in greater quantity than NO3- anions for all three ethanolamines. Photooxidation of triethanolamine yields various intermediates, including a 3-pyrrolidone derivative, diethanolamine, and then ethanolamine, before complete mineralization occurs. The nature of the initial steps in the photodegradation was predicted by computer-aided molecular orbital (MO) calculations of point charges, and by frontier electron densities of all atoms in the ethanolamine structures.

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Documento generato il 02/07/20 alle ore 18:55:11