Composite AgBr Colloidal Spheres/g-C₃N₄ Nanosheets: An Effective Light-Emitting Diode (LED) Irradiation Photocatalyst

In this investigation, AgBr/g-C₃N₄ composite as an effective LED-irradiation photocatalyst was synthesized via a one-pot method. In this composite, the colloidal spheres of AgBr were uniformly dispersed on the g-C₃N₄ nanosheets, which were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray powder diffraction (XRD), X-ray photoelectron spectroscopy (XPS), UV-vis diffused reflectance spectroscopy (DRS), and photoluminescence (PL) spectroscopy. The introduction of g-C₃N₄ nanosheets improved the stability and optimized the spatial charge carrier transfer compared to pristine AgBr, hence exhibited excellent activities toward the degradation of methyl orange (MO) as evidenced by the discoloration rate of MO by 94.8% after 120 min of irradiation. Also, the mechanism based on the band structures and microstructures of the catalysts was then proposed.