Abstract: Three-dimensionally ordered macroporous composite Ag/ZnO-TiO2 was prepared by the sol-gel method combined with a polystyrene (PS) latex sphere templating technique and calcined. The phase structures, chemical composition, optical absorption properties and surface physicochemical properties were well-characterized via a Fourier transform infrared (FT-IR) spectrum, X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Transmission electron microscopy (TEM), N2 adsorption-desorption tests and scanning electron microscopy assisted X-ray energy dispersive spectroscopy (SEM-EDS). Results showed that produced composite Ag/ZnO-TiO2, which by using polystyrene (PS) latex sphere, had anatase crystalline structre, well distribution, good struction and the silver species in the Ag/ZnO-TiO2 was metallic Ag. Moreover, the walls structure of the 3DOMAg/ZnO-TiO2 was mesoporous with compact walls, and the average pore diameters were ca.150 nm, which were three-dimensional ordered macroporous materials (3DOM). The photocatalytic activities of Ag/ZnO-TiO2 were tested by microwave assisted photocatalytic degradation of the dyes, for example, methyl orange. Results showed that this composite material had fine photocatalytic activities for many dyes, and the activity was higher than that of P25 and binary system ZnO-TiO2

Key words: Ag/ZnO-TiO2, Polystyrene, Three-dimensionally ordered macroporous(3DOM), Microwave, Photocatalysis