▎ 摘　　要

NOVELTY - Preparing metal elemental or metal oxide nano-materials, comprises adding metal nitrate to graphene oxide aqueous suspension under ultrasonic conditions for 4-30 minutes, filtering using quantitative filter paper, to obtain a mixture of metal nitrate and graphene on the filter paper, pumping and filtering, washing with water, drying the mixture at 35-55 degrees C, igniting using alcohol lamp, completely combusting black graphene, to obtain single metal or granular metal oxide nano-materials on fibrous membrane. USE - The method is useful for preparing metal elemental or metal oxide nano-materials (claimed). ADVANTAGE - The method achieves low temperature reduction of metal salt, so as to reduce the preparation cost; and improves the utilization efficiency of raw materials.