Fabrication of Bi4O5Br2 photocatalyst for carbamazepine degradation under visible-light irradiation

Bi4O5Br2 with irregular flake shape was synthesized by a facile and energy-saving hydrolysis method. Its band gap energy (Eg) was 2.1 eV. The formation mechanism was proposed. The Bi4O5Br2 exhibited superb visible-light-induced photocatalytic activity (>90%) toward the oxidation of carbamazepine....

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Autores principales:	Xiaoming Mao, Min Li, Mengyao Li
Formato:	article
Lenguaje:	EN
Publicado:	IWA Publishing 2021
Materias:	bi4o5br2 carbamazepine photodegradation teratogenic effect Environmental technology. Sanitary engineering TD1-1066
Acceso en línea:	https://doaj.org/article/1b306453f2da4570868af7d5a5cbec5f
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spelling	oai:doaj.org-article:1b306453f2da4570868af7d5a5cbec5f2021-11-06T11:11:40ZFabrication of Bi4O5Br2 photocatalyst for carbamazepine degradation under visible-light irradiation0273-12231996-973210.2166/wst.2021.214https://doaj.org/article/1b306453f2da4570868af7d5a5cbec5f2021-07-01T00:00:00Zhttp://wst.iwaponline.com/content/84/1/77https://doaj.org/toc/0273-1223https://doaj.org/toc/1996-9732Bi4O5Br2 with irregular flake shape was synthesized by a facile and energy-saving hydrolysis method. Its band gap energy (Eg) was 2.1 eV. The formation mechanism was proposed. The Bi4O5Br2 exhibited superb visible-light-induced photocatalytic activity (>90%) toward the oxidation of carbamazepine. The kinetics rate constant (k) attained 0.0196 min−1. The effect of Bi4O5Br2 dosage, initial solution pH value, and inorganic anions on carbamazepine degradation was investigated. During the oxidation process, photogenerated holes (h+) and superoxide radical anions (•O2−) were the main active species. Based on the reaction intermediates results determined through a combined system of liquid chromatography and mass spectrometry, a possible reaction mechanism was speculated. The degree of contamination of carbamazepine solution after treatment was evaluated through the teratogenic effect experiment. After 120 min of visible light exposure, the carbamazepine solution is free of pollution. Also, the as-synthesized Bi4O5Br2 maintains good chemical stability and could be reused in the photodegradation process, indicating its potential in practical applications. Highlights Novel Bi4O5Br2 has been synthesized successfully through hydrolysis route.; Bi4O5Br2 exhibits excellent visible light photoactivity for carbamazepine degradation.; h+ and •O2− dominate the carbamazepine degradation over Bi4O5Br2 photocatalyst.; The degradation pathway of carbamazepine was proposed based on LC/MS results.; The treated carbamazepine is free of pollution through teratogenic effect experiment.;Xiaoming MaoMin LiMengyao LiIWA Publishingarticlebi4o5br2carbamazepinephotodegradationteratogenic effectEnvironmental technology. Sanitary engineeringTD1-1066ENWater Science and Technology, Vol 84, Iss 1, Pp 77-88 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	bi4o5br2 carbamazepine photodegradation teratogenic effect Environmental technology. Sanitary engineering TD1-1066
spellingShingle	bi4o5br2 carbamazepine photodegradation teratogenic effect Environmental technology. Sanitary engineering TD1-1066 Xiaoming Mao Min Li Mengyao Li Fabrication of Bi4O5Br2 photocatalyst for carbamazepine degradation under visible-light irradiation
description	Bi4O5Br2 with irregular flake shape was synthesized by a facile and energy-saving hydrolysis method. Its band gap energy (Eg) was 2.1 eV. The formation mechanism was proposed. The Bi4O5Br2 exhibited superb visible-light-induced photocatalytic activity (>90%) toward the oxidation of carbamazepine. The kinetics rate constant (k) attained 0.0196 min−1. The effect of Bi4O5Br2 dosage, initial solution pH value, and inorganic anions on carbamazepine degradation was investigated. During the oxidation process, photogenerated holes (h+) and superoxide radical anions (•O2−) were the main active species. Based on the reaction intermediates results determined through a combined system of liquid chromatography and mass spectrometry, a possible reaction mechanism was speculated. The degree of contamination of carbamazepine solution after treatment was evaluated through the teratogenic effect experiment. After 120 min of visible light exposure, the carbamazepine solution is free of pollution. Also, the as-synthesized Bi4O5Br2 maintains good chemical stability and could be reused in the photodegradation process, indicating its potential in practical applications. Highlights Novel Bi4O5Br2 has been synthesized successfully through hydrolysis route.; Bi4O5Br2 exhibits excellent visible light photoactivity for carbamazepine degradation.; h+ and •O2− dominate the carbamazepine degradation over Bi4O5Br2 photocatalyst.; The degradation pathway of carbamazepine was proposed based on LC/MS results.; The treated carbamazepine is free of pollution through teratogenic effect experiment.;
format	article
author	Xiaoming Mao Min Li Mengyao Li
author_facet	Xiaoming Mao Min Li Mengyao Li
author_sort	Xiaoming Mao
title	Fabrication of Bi4O5Br2 photocatalyst for carbamazepine degradation under visible-light irradiation
title_short	Fabrication of Bi4O5Br2 photocatalyst for carbamazepine degradation under visible-light irradiation
title_full	Fabrication of Bi4O5Br2 photocatalyst for carbamazepine degradation under visible-light irradiation
title_fullStr	Fabrication of Bi4O5Br2 photocatalyst for carbamazepine degradation under visible-light irradiation
title_full_unstemmed	Fabrication of Bi4O5Br2 photocatalyst for carbamazepine degradation under visible-light irradiation
title_sort	fabrication of bi4o5br2 photocatalyst for carbamazepine degradation under visible-light irradiation
publisher	IWA Publishing
publishDate	2021
url	https://doaj.org/article/1b306453f2da4570868af7d5a5cbec5f
work_keys_str_mv	AT xiaomingmao fabricationofbi4o5br2photocatalystforcarbamazepinedegradationundervisiblelightirradiation AT minli fabricationofbi4o5br2photocatalystforcarbamazepinedegradationundervisiblelightirradiation AT mengyaoli fabricationofbi4o5br2photocatalystforcarbamazepinedegradationundervisiblelightirradiation
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Fabrication of Bi4O5Br2 photocatalyst for carbamazepine degradation under visible-light irradiation

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