One-Step Hydrothermal Method to Synthesis WO3.0.33H2O/BiOCl Composite as an Ultraviolet and Visible Light-Activated Photocatalyst

Document Type : Research Article

Authors

Department of Physics, Jundi-Shapur University of Technology, Dezful, I.R. IRAN

Abstract

In recent years, semiconductor photocatalysts have received great research interest for water purification due to their photocatalytic activity under solar light irradiation. In this study, a simple one-step hydrothermal method was used to synthesis a WO3.0.33H2O/BiOCl composite photocatalyst. The products were characterized by X-Ray Diffraction (XRD), Scanning electron microscopy (SEM), Diffuse Reflectance Spectroscopy (DRS), and N2 adsorption-desorption techniques. The photocatalytic properties of samples were investigated by photocatalytic degradation of RhB as a model pollutant under xenon lamp (55 W) and white light LED lamp (30 W) as simulated solar light and visible light sources, respectively. The results indicated that the Bi/W molar ratio has a significant effect on photocatalytic activity. The synthesized sample with Bi/W molar ratio of 1.0 displays the best photocatalytic performance compared with other samples. In the presence of 10 mg of this photocatalyst 80% of RhB solution (60 ml, 10 mg/L) could be degraded in 80 min under simulated solar light irradiation. The results indicated that the higher photocatalytic performance of dye molecules over WO3.0.33H2O/BiOCl composite could be ascribed to its larger specific surface area (26.60 m2/g), lower optical band gap (~2.21 eV) and interaction between WO3.0.33H2O and BiOCl. Also, the radical scavenger experiments exhibit that the holes (h+) and superoxide radicals (•O2) are the main active species in the photocatalytic degradation process of RhB over WO3.0.33H2O/BiOCl composite photocatalyst.

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Main Subjects

References

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Nashrieh Shimi va Mohandesi Shimi Iran
Volume 39, Issue 3 - Serial Number 97
September 2020
Pages 81-91

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