▎ 摘　　要

NOVELTY - A three dimensional graphene macro body is prepared by taking carbonaceous waste, placing on substrate, placing substrate on quartz boat, putting into tubular furnace, pumping protective gas, heating, and reacting. USE - Method for preparing three dimensional graphene macro body used for supercapacitor, microbial fuel cell, chemical sensor, catalytic material, bio-medicine and solid phase extraction agent (all claimed). ADVANTAGE - The method is low-cost, simple and easy, environment-friendly, safe and suitable for industrialization. The graphene is suitable for solid-liquid separation.