Preparation and Photocatalytic Property of Graphene/TiO2 Composite Powder

Graphene/TiO2 (GR/TiO2) composite powders were prepared by co-precipitation method, and their morphology, structure and photocatalytic property were studied by scanning electron microscope (SEM), transmission electron microscopy (TEM), X-ray diffraction and ultraviolet spectrophotometer, respectively. The experimental results show that the photocatalytic activity of TiO2 is significantly improved by GR. When the content of GR in the composite powder is 7.88%, the GR/TiO2 composite powders treated at 500°C display the good photocatalytic performance in which the degradation volume of methyl orange (MO) approaches 100% within 120 min. The improvement for photocatalytic properties of TiO2 is attributed to the special structure and excellent electrical properties of GR.