Photocatalytic properties of BiVO{sub 4} prepared by the co-precipitation method: Degradation of rhodamine B and possible reaction mechanisms under visible irradiation

Bismuth vanadate (BiVO{sub 4}) was synthesized by the co-precipitation method at 200 {sup o}C. The photocatalytic activity of the oxide was tested for the photodegradation of rhodamine B under visible light irradiation. The analysis of the total organic carbon showed that the mineralization of rhoda...

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Bibliographic Details
Published in:Materials research bulletin 2010-02, Vol.45 (2)
Main Authors: Martinez-de la Cruz, A., Perez, U.M. Garcia
Format: Article
Language:English
Subjects:
GAS CHROMATOGRAPHY
IRRADIATION
MASS SPECTROSCOPY
MATERIALS SCIENCE
PHOTOCATALYSIS
REACTION KINETICS
SEMICONDUCTOR MATERIALS
SYNTHESIS
X-RAY DIFFRACTION
XYLENES
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Summary:Bismuth vanadate (BiVO{sub 4}) was synthesized by the co-precipitation method at 200 {sup o}C. The photocatalytic activity of the oxide was tested for the photodegradation of rhodamine B under visible light irradiation. The analysis of the total organic carbon showed that the mineralization of rhodamine B over a BiVO{sub 4} photocatalyst ({approx}40% after 100 h of irradiation) is feasible. In the same way, a gas chromatography analysis coupled with mass spectroscopy revealed the existence of organic intermediates during the photodegradation process such as ethylbenzene, o-xylene, m-xylene, and phthalic anhydride. The modification of variables such as dispersion pH, amount of dissolved O{sub 2}, and irradiation source was studied in order to know the details about the photodegradation mechanism.
ISSN:0025-5408
1873-4227
DOI:10.1016/J.MATERRESBULL.2009.09.029