▎ 摘　　要

NOVELTY - Large-scale low-temperature thermal reduction preparation of graphene comprises preparing graphite oxide solution by traditional Hummer's method, adding flocculating agent, naturally settling for 2 times, washing to system pH of 6-7, drying, low-temperature crushing to powder at 10-15 degrees C, heating 1-2 g powder in tubular furnace at 100-200 degrees C at heating rate of 4 degrees C/second, expanding for 3-10 minutes, drying at 70-90 degrees C for 20-30 hours and packaging. USE - Method for large-scale low-temperature thermal reduction preparation of graphene (claimed). ADVANTAGE - The method has simple device and technique, and green and environment-friendly preparation.