Preparation of BiVO4/bentonite catalysts and their photocatalytic properties under simulated solar irradiation

A series of BiVO4/bentonite catalysts calcined at different temperatures were prepared by the solution combustion method and characterized by X-ray diffraction (XRD), field emission-scanning electron microscopy (FE-SEM), Brunauer–Emmett–Teller (BET) specific surface area and ultraviolet–visible diff...

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Bibliographic Details
Published in:Materials science in semiconductor processing 2013-02, Vol.16 (1), p.99-105
Main Authors: Qu, J.G., Li, N.N., Liu, B.J., He, J.X.
Format: Article
Language:English
Subjects:
Applied sciences
Bentonite
BiVO4/bentonite
Catalysis
Catalysts
Chemistry
Cross-disciplinary physics: materials science
rheology
Energy
Exact sciences and technology
General and physical chemistry
Iron
Materials science
Materials synthesis
materials processing
Metals. Metallurgy
Natural energy
Photocatalysis
Photochemistry
Physical chemistry of induced reactions (with radiations, particles and ultrasonics)
Physics
Powder metallurgy. Composite materials
Production techniques
Roasting
Semiconductors
Solar energy
Solar radiation
Solution combustion synthesis
Specific surface
Technology
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Summary:A series of BiVO4/bentonite catalysts calcined at different temperatures were prepared by the solution combustion method and characterized by X-ray diffraction (XRD), field emission-scanning electron microscopy (FE-SEM), Brunauer–Emmett–Teller (BET) specific surface area and ultraviolet–visible diffuse reflectance (UV–vis DRS) spectra. The results of BET analysis showed that BET specific surface area of BiVO4/bentonite crystallite decreased with increasing calcination temperature. The results of XRD, FE-SEM and UV–vis DRS analysis indicated that BiVO4 on bentonite calcined at 300°C was in a monoclinic structure with a diameter of around 30nm, as well as strong absorbance in a region of 350–500nm. The photocatalytic activities of as-prepared catalysts were discussed by the degradation of C.I. Reactive Blue 19 (RB19) under simulated solar irradiation. It was found that the catalyst could be separated from aqueous suspensions by sedimentation after reaction, and maintained almost the same activity after being used five times.
ISSN:1369-8001
1873-4081
DOI:10.1016/j.mssp.2012.06.010