以偏钛酸和三聚氰胺为原料，在空气氛围下700 ℃煅烧退火制备C-N改性TiO2光催化剂。利用XRD、FT-IR、XPS、SEM、UV-Vis、BET等手段对改性前后的 样品进行表征分析。分析结果显示，改性样品为大比表面积、多孔隙锐钛矿晶型TiO2材料，TiO2晶格中部分O被N取代，表面吸附酰胺化合物。与纯TiO2相比， C-N/TiO2对NO的催化氧化效率大幅度提高。其中C-N/TiO2-2对NO的催化氧化率达到69%。

Using metatitanic acid and melamine as raw materials, C-N modified TiO2 photocatalyst were prepared by calcination annealing at 700 ℃ in air atmosphere. The samples before and after modification were characterized by XRD, FT-IR, XPS, SEM, UV-Vis, BET, etc. The results show that the modified material is a material of porous anatase crystal TiO2 having a large specific surface area. Part of O in the TiO2 lattice is replaced by N, amide compounds are adsorbed on the surface. Compared with pure TiO2, the catalytic oxidation efficiency of NO by C-N/TiO2 is greatly improved. The catalytic oxidation rate of NO by C-N/TiO2-2 reaches 69%.