Photocatalytic properties of BiVO4 prepared by the co-precipitation method: Degradation of rhodamine B and possible reaction mechanisms under visible irradiation |
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Authors: | A. Martí nez-de la Cruz,U.M. Garcí a Pé rez |
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Affiliation: | Facultad de Ingeniería Mecánica y Eléctrica, Universidad Autónoma de Nuevo León, Ciudad Universitaria, C.P. 66451, San Nicolás de los Garza, N.L., Mexico |
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Abstract: | Bismuth vanadate (BiVO4) was synthesized by the co-precipitation method at 200 °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 BiVO4 photocatalyst (∼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 O2, and irradiation source was studied in order to know the details about the photodegradation mechanism. |
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Keywords: | A. Oxides A. Semiconductors B. Chemical synthesis C. X-ray diffraction D. Catalytic properties |
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