Abstract
A novel visible light-driven heterojunction photocatalyst composed of graphitic carbon nitride (g-C3N4) and bismuth oxychloride (BiOCl) was synthesized. The resulting g-C3N4/BiOCl composite was characterised by X-ray diffraction, field emission scanning electron microscopy, Fourier transform infrared spectroscopy, and ultraviolet-visible diffuse reflection spectroscopy. Under visible light irradiation, g-C3N4/BiOCl composites displayed a markedly higher photocatalytic activity than pure BiOCl in the degradation of phenol and p-chlorophenol. Among the hybrid photocatalysts, g-C3N4/BiOCl with 50% mass ratio of g-C3N4 exhibited the highest photocatalytic activity for the decolourisation of phenol. Enhanced photocatalytic performance resulted from the effective separation of photogenerated electron–hole pairs because of the heterojunction build-up between g-C3N4 and BiOCl.
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