Preparation of g-C_3N_4–CeO_2/ATP Composite and Its Visible Light Photocatalytic Performance

g-C3N4–Ce O2/attapulgite(ATP) composite was synthesized by a microwave assisted liquid phase method. The structures of the composite were characterized by X-ray diffraction, Fourier-transform infrared spectroscopy, ultraviolet-visible diffuse reflectance and transmission electron microscopy, respectively. The photocatalytic activities of g-C3N4–Ce O2/ATP composite were investigated via degradation of methylene blue(MB) under visible irradiation. The effect of mass ratio of Ce O2 to g-C3N4 on the photocatalytic activity was investigated. The results indicate that three-dimensional network structure is formed by ATP, Ce O2 and g-C3N4, which can effectively increase the surface area of the composite and promote the separation of electrons and holes by resulting electronic transmission channels of multi-channel in space. The degradation rate of MB can reach 92% when the mass ratio of Ce O2 to g-C3N4 is 3/10.