▎ 摘　　要

NOVELTY - Preparing graphene on diamond surface involves cleaning diamond powder and graphite powder with ammonia water in an ultrasonic water bath and filtering with alcohol, and drying in an oven. The dried diamond powder and graphite powder are obtained by vacuum discharge plasma sintering sintered block, grounded to obtain diamond / graphite powder, added potassium nitrate to concentrated sulfuric acid under the condition of ice water bath, add the diamond / graphite powder prepared after potassium nitrate is completely dissolved, and then slowly added potassium permanganate, take out after stirring under ice bath conditions for a certain time, moved the container to a water bath and stirred at a constant temperature, slowly added ultrapure water, moved the container to an oil bath to keep warm, removed the container and cooled to room temperature. USE - Method for preparing graphene on diamond surface. ADVANTAGE - The method enables to prepare graphene on diamond surface is suitable for large scale production, good for improving the production efficiency, and solves the problem of low bonding force. DETAILED DESCRIPTION - Preparing graphene on diamond surface involves cleaning diamond powder and graphite powder with ammonia water in an ultrasonic water bath and filtering with alcohol, and drying in an oven. The dried diamond powder and graphite powder are obtained by vacuum discharge plasma sintering sintered block, grounded to obtain diamond / graphite powder, added potassium nitrate to concentrated sulfuric acid under the condition of ice water bath, add the diamond / graphite powder prepared after potassium nitrate is completely dissolved, and then slowly added potassium permanganate, take out after stirring under ice bath conditions for a certain time, moved the container to a water bath and stirred at a constant temperature, slowly added ultrapure water, moved the container to an oil bath to keep warm, removed the container and cooled to room temperature, added ultrapure water and hydrogen peroxide, let the supernatant stand still, then addded hydrochloric acid and ultrapure water, stirred uniformly, divided the supernatant after layering, added ultrapure water to the container, poured the resulting dispersion into a dialysis bag for dialysis in an ultrapure water environment after changing the water, and finally oscillated the resulting diamond / graphene oxide dispersion. The diamond / graphene oxide dispersion obtained is mixed with hydrazine hydrate, poured into a reaction kettle after ultrasonic vibration, and naturally cooled after heat preservation, and then the dispersion, placed in a quartz tube, heated up rapidly under argon atmosphere for a period of time, and then removed excess water at a low temperature to obtain graphene modified diamond.