摘要
TiO2 nanocrystals/graphene (TiO2/GR ) 合成被作为先锋联合絮凝和热水的减小技术使用石墨氧化物和 TiO2 胶体准备。获得的材料被扫描电子显微镜学，转变电子显微镜学， X 光检查衍射， N2 吸附解吸附作用，和紫外可见的弥漫的光谱学检验。结果建议有大约 15 nm 的直径的 TiO2 nanocrystals 的存在阻止 GR nanosheets 凝块。由于 GR nanosheets 上的 TiO2 nanocrystals 的一致分发， TiO2/GR 合成展览在可见区域，到甲又蓝色的更高的吸附能力和与纯 TiO2 相比的费用分离和交通的更高的效率的更强壮的轻吸收。而且，与 30% 的一个 GR 内容合成的 TiO2/GR 比纯 TiO2 和商业 P25 的从水显示出 MB 的更高的 photocatalytic 移动效率在下面紫外并且日光照耀。
TiO2 nanocrystals/graphene （TiO2/GR） composite are prepared by combining flocculation and hydrothermal reduction technology using graphite oxide and TiO2 colloid as precursors. The obtained materials are examined by scanning electron microscopy, transition electron microscopy, X-ray diffraction, N2 adsorption desorption, and ultraviolet-visible diffuse spectroscopy. The results suggest that the presence of TiO2 nanocrystals with diameter of about 15 nm prevents GR nanosheets from agglomeration. Owing to the uniform distribution of TiO2 nanocrystals on the GR nanosheets, TiO2/GR composite exhibits stronger light absorption in the visible region, higher adsorption capacity to methylene blue and higher efficiency of charge separation and transportation compared with pure TiO2. Moreover, the TiO2/GR composite with a GR content of 30% shows higher photocatalytic removal efficiency of MB from water than that of pure TiO2 and commercial P25 under both UV and sunlight irradiation.
