Nitrogen-doped TiO₂ and reduced graphene oxide (RGO) nanocomposites (NTG) were prepared by sol-gel method followed by annealing treatment process under N₂ atmosphere. The as-prepared NTG nanocomposite were characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Fourier-transform infrared spectroscopy (FT-IR) and ultraviolet-visible diffuse reflectance spectroscopy (DRS). The results indicate that the incorporation of nitrogen onto both RGO and TiO₂ was accomplished simultaneously in the facile process. Nitrogen doping makes the light excitation range red shift and can enhance the electron-hole separation effectively. The photocatalytic activity of the as-prepared samples was evaluated through the degradation of methyl orange (MO) under visible light irradiation. The introduction of nitrogen increased the photodegradation activity, which can be indicated by the fitted apparent first-order kinetics rate constant k, increasing about four times from 0-NTG-450 to 15-NTG-450. The annealing treatment further increased the photodegradation activity about 1.5 times of 15NTG-450 for 15NTG-800.

通过溶胶-凝胶法和N ₂气氛下的退火处理工艺制备氮掺杂的TiO ₂和还原氧化石墨烯(RGO)纳米复合材料(NTG) 。通过透射电子显微镜 (TEM)、X 射线衍射 (XRD)、X 射线光电子能谱 (XPS)、傅里叶变换红外光谱 (FT-IR) 和紫外-可见漫反射光谱对所制备的 NTG 纳米复合材料进行表征(DRS)。结果表明，在 RGO 和 TiO ₂上掺入氮在轻松的过程中同时完成。氮掺杂使光激发范围红移，可以有效增强电子空穴分离。通过在可见光照射下降解甲基橙 (MO) 来评估所制备样品的光催化活性。氮的引入增加了光降解活性，这可以通过拟合的表观一级动力学速率常数 k 来表明，从 0-NTG-450 到 15-NTG-450 增加了大约四倍。退火处理进一步提高了15NTG-800的光降解活性，约为15NTG-450的1.5倍。