Visible light-induced Cr-doped SrTiO₃-g-C₃N₄ composite for improved photocatalytic performance

Abstract

Novel visible light-induced Cr-doped SrTiO₃-g-C₃N₄ composite photocatalysts were synthesized by introducing polymeric g-C₃N₄. The composite photocatalyst was characterized by X-ray diffraction (XRD), high-resolution transmission electron microscopy (HRTEM), Fourier transform infrared (FT-IR) spectroscopy, UV-vis diffuse reflection spectroscopy, photoluminescence (PL) spectroscopy and BET surface area measurements. The photocatalytic oxidation ability of the novel composite photocatalyst was evaluated using methyl orange (MO) as a target pollutant. The photocatalysts exhibited a significantly enhanced photocatalytic performance in degrading MO. The optimal g-C₃N₄ content for the photodegradation activity of the composite photocatalysts was determined. The as-prepared composite photocatalyst exhibits an improved photocatalytic activity due to enhancement of photo-generated electron-hole separation at the interface.

Keywords

photocatalysis / g-C₃N₄ / Cr-doped SrTiO₃ / composite

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