Solvothermal synthesis of crystalline carbon nitrides  

作　　者：L Qiang, CAO Chuanbao & ZHU Hesun Research Center of Materials Science, Beijing Institute of Technology, Beijing 100081, China 

出　　处：《Chinese Science Bulletin》2003年第6期519-522,共4页

基　　金：supported by the National Natural Science Foundation of China(Grant No.20171007);the Research Fund for the Doctoral Program of Higher Education of China(Grant No.B-123).

摘　　要：A solvothermal reaction of anhydrous C3N3Cl3 and Li3N using benzene as the solvent has been carried out to prepare crystalline carbon nitrides successfully at 350℃ and 5—6 MPa. X-ray diffraction (XRD) indicated that the major part of our brown sample was mainly composed of a-C3N4 and b-C3N4 with lattice parameters of a = 0. 65 nm, c = 0.47 nm for a-C3N4 and a = 0.644 nm, c = 0. 246 nm for b-C3N4, which match the latest ab-initio calculations quite well. The N/C ratio in the powder is about 0.66. The Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spec-troscopy (XPS) analyses suggested the presence of both sin-gle and double carbon-nitrogen bonds. The kinetics effects of our solvothermal reaction to prepare crystalline carbon ni-trides are also discussed chiefly.A solvothermal reaction of anhydrous C3N3Cl3 and Li3N using benzene as the solvent has been carried out to prepare crystalline carbon nitrides successfully at 350℃ and 5—6 MPa. X-ray diffraction (XRD) indicated that the major part of our brown sample was mainly composed of a-C3N4 and b-C3N4 with lattice parameters of a = 0. 65 nm, c = 0.47 nm for a-C3N4 and a = 0.644 nm, c = 0. 246 nm for b-C3N4, which match the latest ab-initio calculations quite well. The N/C ratio in the powder is about 0.66. The Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spec-troscopy (XPS) analyses suggested the presence of both sin-gle and double carbon-nitrogen bonds. The kinetics effects of our solvothermal reaction to prepare crystalline carbon ni-trides are also discussed chiefly.

关 键 词：氮化碳晶体 β-C3N4 溶解热法 合成 超硬材料 α-C3N4 

分 类 号：O722[理学—晶体学]