AgCl/Ag3PO4 HYBRID MATERIALS WITH ENHANCED VISIBLE LIGHT PHOTOCATALYTIC ACTIVITY FOR THE DEGRADATION OF 4-CHLOROPHENOL

摘要

A novel AgCl/Ag3PO4 composite was synthesized by a simple anion-exchange precipitation method. The as-prepared samples were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscope (SEM), energy dispersive spectrometer (EDS), transmission electron microscope (TEM) and diffuse-reflection spectra (DRS). The analyses indicated that the heterojunction structure had formed in the composite. AgCl nanoparticles were uniformly distributed on the surface of Ag3PO4. UV-vis diffuse reflectance spectroscopy (DRS) of the AgCl/Ag3PO4 composites showed that the addition of AgCl had promoted the optical absorption of Ag3PO4 in the visible region. The results showed that the photocatalytic activity of the AgCl/Ag3PO4 composites for photodegradation of 4-chlorophenol (4-CP) were efficient and exhibited the highest photocatalytic degradation efficiency which was much higher than the pure Ag3PO4 crystals and AgCl/Ag3PO4 (20 at%). A photocatalytic mechanism of the AgCl/Ag3PO4 was also discussed.