▎ 摘　　要

NOVELTY - Preparing a silica/graphene nanocomposite by microwave chemical vapor deposition comprises (1) placing silica in a reaction chamber of a microwave plasma, and a shielding gas is introduced at a flow rate of 150-250 sccm, heating at a temperature rising rate of 25-40 degrees C/minutes to maintain the temperature in the reaction chamber to 500-700 degrees C, (2) introducing mixed gas of hydrogen and a carbon source gas into a reaction chamber of a microwave plasma at a flow rate of 150-250 sccm, and in-situ growth is performed on the surface of the silica to form a graphene coating layer, and the growth is stopped after the growth is completed, cooling mixed gas to room temperature to obtain a silica/graphene nanocomposite, and the volume ratio of the hydrogen gas to the carbon source gas is 1:5 to 10. USE - The method is useful for preparing a silica/graphene nanocomposite by microwave chemical vapor deposition. ADVANTAGE - The material has high conductivity and high mechanical strength. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for silica/graphene nanocomposite prepared by microwave chemical vapor deposition which is mentioned in above mentioned method.