Large-Scale Synthesis of Nitrogen-Rich Carbon Nitride Microfibers by Using Graphitic Carbon Nitride as Precursor

摘要

Carbon nitride materials have been of great interests to the scientific community due to their unique properties such as extreme hardness, low density, chemical inertness, biocompat-ibility, etc. According to theoretical calculations published elsewhere, some covalent carbon-nitrogen compounds (e.g., β-C_3N_4 and cubic-C_3N_4) are expected to possess a very high bulk modulus even exceeding that of diamond. However, due to the great thermodynamic stability of carbon and N_2 molecules, the experimental synthesis of crystalline carbon nitride with C_3N_4 stoichiometry remains a challenge to date. In recent years much attention has been paid to the graphitic form of carbon nitride (g-C_3N_4) which was successfully synthesized via the polycondensation of triazine-based compounds.