Enhanced photocatalytic activity of BiVO 4 powders synthesized in presence of EDTA for the decolorization of rhodamine B from aqueous solution

Bismuth vanadate (BiVO ) powders were successfully synthesized in presence of EDTA via microwave irradiation and used as photocatalysts in the oxidation reaction of rhodamine B (rhB) under visible light. Different concentrations of EDTA (0.5 to 10%) to chelate Bi ions were employed on the BiVO synth...

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Published inEnvironmental science and pollution research international Vol. 25; no. 34; p. 34123
Main Authors da Cruz Severo, Eric, Dotto, Guilherme Luiz, Martínez-de la Cruz, Azael, Cuellar, Enrique López, Foletto, Edson Luiz
Format Journal Article
LanguageEnglish
Published Germany 01.12.2018
Subjects
Bismuth - chemistry
Catalysis
Coloring Agents - chemistry
Edetic Acid - chemistry
Light
Microscopy, Electron, Scanning
Microwaves
Oxidation-Reduction
Powders
Rhodamines - chemistry
Solutions - chemistry
Vanadates - chemistry
Water Pollutants, Chemical - chemistry
Decolorization
Photocatalysis
BiVO4
Microwave
Rhodamine B
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Summary:Bismuth vanadate (BiVO ) powders were successfully synthesized in presence of EDTA via microwave irradiation and used as photocatalysts in the oxidation reaction of rhodamine B (rhB) under visible light. Different concentrations of EDTA (0.5 to 10%) to chelate Bi ions were employed on the BiVO synthesis. Under the presence of EDTA, a monoclinic crystalline structure was obtained, whereas a mixture of monoclinic and tetragonal phases was observed in the absence of EDTA. In addition, the use of different EDTA concentrations promoted the formation the different shapes of particles. The BiVO sample synthesized with low concentration of EDTA (0.5%) exhibited about 85% of rhB decolorization in 300 min at pH 7.5. Therefore, this high efficiency can be attributed to a combination of intrinsic properties such as the morphology type and monoclinic structure of BiVO particles.
ISSN:1614-7499