PREPARATION AND PHOTOCATALYTIC PERFORMANCE OF AG31PO4/MOS2 COMPOSITE PHOTOCATALYST

Abstract

Ag 3 PO 4 and MoS 2 semiconductor materials were synthesized by hydrothermal method. The composite materials were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray energy dispersive spectroscopy (EDS), and UV–vis diffuse reflectance spectroscopy (UV–VIS DRS), and the photocatalytic degradation of organic dyes by rhodamine B was studied. The results showed that: Ag 3 PO 4 /MoS 2 composite photocatalyst is formed by using MoS 2 microspheres as the matrix and Ag 3 PO 4 nanoparticles coated on its surface or embedded in its lamellar structure. When the molar fraction of Ag 3 PO 4 in the composite product is 75%, the composite photocatalyst has better light absorption capacity and lower photogenerated carrier recombination rate (optical band gap is 1.24 eV), and shows better visible light photocatalytic degradation activity in the photocatalytic degradation of RhB experiment, the catalytic degradation rate is as high as 95.0%. At the same time, the degradation mechanism showed that H[Formula: see text] and O [Formula: see text] were the main active substances for RhB degradation. The photocatalyst has excellent performance and simple preparation method. It has broad application prospects in the field of photocatalysis.