摘要
By a novel solid-state reaction process using amorphous C3N4 （α-C3N4） and transition metal oxides as starting reagents, cubic TaC, NbC and hexagonal WC nanoparticles were successfully synthesized at 1150 . The products were characterized by power X-ray diffraction （XRD）, field-emission scanning electron microscope （FE-SEM）, energy-dispersive X-ray spectroscopy （EDX） transmission electron microscopy （TEM） and high-resolution TEM （HRTEM）. The experimental results show that a-C3N4 obtained by the reaction between C3N3C13 and Li3N is a highly efficient carburation reagent and the transition metal oxides are completely transformed into the corresponding metal carbide nanoparticles at 1150 ℃, respectively, which is significantly lower than that reported for the traditional preparation of carbides, typically〉 1600 ℃. The TaC, NbC and WC nanoparticles are found to have an average particle size of 10 nm, 15 nm and 8 nm by TEM observation, respectively.
By a novel solid-state reaction process using amorphous C3N4 （α-C3N4） and transition metal oxides as starting reagents, cubic TaC, NbC and hexagonal WC nanoparticles were successfully synthesized at 1150 . The products were characterized by power X-ray diffraction （XRD）, field-emission scanning electron microscope （FE-SEM）, energy-dispersive X-ray spectroscopy （EDX） transmission electron microscopy （TEM） and high-resolution TEM （HRTEM）. The experimental results show that a-C3N4 obtained by the reaction between C3N3C13 and Li3N is a highly efficient carburation reagent and the transition metal oxides are completely transformed into the corresponding metal carbide nanoparticles at 1150 ℃, respectively, which is significantly lower than that reported for the traditional preparation of carbides, typically〉 1600 ℃. The TaC, NbC and WC nanoparticles are found to have an average particle size of 10 nm, 15 nm and 8 nm by TEM observation, respectively.
