Significantly enhanced performance of g-C₃N₄/Bi₂MoO₆ films for photocatalytic degradation of pollutants under visible-light irradiation

Abstract

The films of photocatalysts have been widely used in decomposition pollutants. In this study, the films were successfully prepared from Bi₂MoO₆ and g-C₃N₄/Bi₂MoO₆ by a simple method, respectively. The samples were characterized by X-ray diffraction(XRD), scanning electron microscopy(SEM), transmission electron microscopy( TEM), Fourier transform infrared spectroscopy(FTIR), photoluminescence(PL), UV-Vis diffuse reflectance spectroscopy( DRS) and electrochemical experiments to investigate crystalline structure, morphology, composition and properties. The photocatalytic activity of the photocatalyst films for the pollutants was evaluated by degradation of methylene blue(MB) in aqueous solution under visible light irradiation. Experiments revealed that the film of g-C₃N₄/Bi₂MoO₆ exhibited higher photocatalytic ability compared to the single-component photocatalyst, and proved its stability. The superior catalytic performance can be attributed to the effective separation of electron-hole pairs and the reduced rate of recombination. This work is of great value for the preparation of photocatalysts films.

Keywords

Film / g-C₃N₄ / Bi₂MoO₆ / Photocatalyst

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