The Microwave Synthesis and Photocatalytic Activity of ZnO/TiO2 Nanocomposites
ZnO/TiO2 nanocomposites were prepared by mixing of ultrasonic vibration and sintering at 500°C for 2 h initial nano-ZnO and nano-TiO2 which were synthesized by a microwave irradiation heating technique from an aqueous solution of Zn(Ac)2•2H2O, Ti(SO4)2, respectively. The samples were characterized by the techniques of X-ray diffraction (XRD) and transmission electron microscopy (TEM). And we have also carried on research to the photocatalytic activity of the as-prepared ZnO/TiO2 nanocomposites by photo-degrading methyl orange. The result indicates that the as-prepared sample is a good photocatalyst. When m (TiO2) /m (ZnO) ratio was equal to 4, the photocatalytic activity of the nanocomposites is best. The result shows that the degradation ratio of the methyl orange (2mg/L) has reached 93% within 80 min