▎ 摘　　要

NOVELTY - Preparation of transition metal carbide nanocapsules coated with doped graphene comprises placing 5-200 g transition metal block on anode of DC arc hydrogen plasma equipment, introducing hydrogen, inert gas, carbon containing gas and gas containing doping heterogeneous elements, connecting power supply to form stable arc, evaporating transition metal block, controlling arc reaction time for 5-20 minutes, cooling reaction product to room temperature and introducing air to passivate. The doping heterogeneous element is nitrogen, boron and/or phosphorus. The volume of hydrogen is 0-100 times of gas doped with heterogeneous elements. The volume of inert gas is 0-500 times of gas doped with heterogeneous elements. The volume of carbon containing gas is 20-200 times of doping gas. USE - The method is for preparation of transition metal carbide nanocapsules coated with doped graphene. ADVANTAGE - The method has simple and large-scale preparation process and controls morphology by atmosphere during preparation process. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for application of the doped graphene coated transition metal carbide nanocapsule in microwave catalysis comprising dispersing doped graphene coated transition metal carbide nanocapsules in solution containing pollutants, placing in three port flask to obtain microwave reaction suspension, connecting suspension with mixing and cooling device, placing in microwave reactor to make microwave reaction device, irradiating suspension by microwave electromagnetic wave with set frequency and testing microwave catalytic degradation performance of the catalyst for pollutants.