关键词: 石墨烯, 二氧化钛, 复合材料, 光催化降解, 聚丙烯酰胺

Abstract: Graphene/titania（GR/TiO2） composites were prepared by facile hydrothermal reaction with graphite powder and n-butyl titanate as raw materials.The composites were characterized by X-ray diffraction（XRD） and scanning electron micro- scope（SEM）.The influences of graphene content，lighting conditions，calcination temperature，lighting time，and pH etc.on photocatalytic degradation activities of GR/TiO2 to polyacrylamide（PAM） were evaluated.Results showed that TiO2 nanoparticles were dispersed on the surface of graphene sheets uniformly in the GR/TiO2 composites.When the GR mass fraction was 10%，the calcination temperature was 450 ℃，the photocatalytic time was 30 min，and pH was at 6~7，the UV photocatalytic degradation of GR/TiO2 to PAM could reach more than 96%.

Key words: graphene, titania, composites, photocatalytic degradation, polyacrylamide