3+和CA的螯合和聚酯，形成穩(wěn)定的Ce3+-CA螯合物前驅(qū)體。通過水相過程實(shí)現(xiàn)Ce源與C源在分子水平上的均勻混合。熱處理過程包括原位碳化和碳熱還原氮化反應(yīng)兩部分。原位碳化過程形成的CeO2/C粉末促進(jìn)了CeO2和C之間的緊密接觸，從而減少Ce源和C源原子的擴(kuò)散距離，以促進(jìn)碳熱還原氮化過程。;CeN powder was prepared through the carbothermal reduction nitridation reaction assisted by sol-gel method. Citric acid (CA) was used as the chelating agent, indicating that the organic material is used as the carbon source. The whole process could be divided into an aqueous phase process and a heat treatment process. The aqueous phase process mainly involved the chelation and polyester of Ce3+ and CA to form stable Ce3+-CA chelate precursors. Homogeneous mixing at the molecular level of Ce and C sources could be achieved by the aqueous phase process. The heat treatment process included the in-situ carbonization and carbothermal reduction nitridation reaction. The in-situ carbonization process formed CeO2/C powder, promoting the close contact between CeO2 and C. The diffusion distance between the atoms of Ce and C sources is reduced to facilitate the carbothermal reduction nitridation process."/>