▎ 摘　　要

NOVELTY - Preparation of three-dimensional porous graphene involves adding 500 mg oxidized graphite in a quartz tube, pumping vacuum of 8x 104-9x 104 Pa to tube, closing the tube valve, sealing tube in muffle furnace, heating at 500-1200 degrees C for 5-30 minutes with rate of 5-20 degrees C/minute for 5-30 minutes, taking out the quartz tube and immersing in ice water for 3-5 minutes, repeating heating-quenching process for 1-9 times, and collecting quartz tube product. USE - Preparation of three-dimensional porous graphene used in lithium ion battery, fuel cell, solar cell, photocatalyst, catalytic oxidation, gas sensor, and drug delivery (all claimed). ADVANTAGE - The method efficiently and economically provides environmentally-friendly three-dimensional porous graphene. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for usage method of three-dimensional porous graphene in lithium-ion battery, fuel cell, solar cell, photocatalyst, oxidation, gas sensor, and drug delivery system combined with graphene oxide, tin oxide, iron oxide, cobalt oxide, copper oxide, molybdenum oxide, gold nanoparticles and palladium nanoparticles.