| abstract |
The invention belongs to the technical field of carbon material production technology, and specifically discloses a method for preparing graphene by using lignin as a raw material. The method uses a layered or powdery substance as a substrate, and through an electrostatic layer-by-layer self-assembly method, lignin and catalyst precursors are alternately assembled on the surface of the substrate layer by layer; then the lignin/catalyst precursor/substrate The compound is placed in a tube furnace with dual temperature zones, and H 2 /Ar mixed gas is introduced at a certain speed, and the temperature is raised in a certain program in the furnace at the same time. After cooling down to room temperature, the sample was taken out, soaked in acid to remove the catalyst, washed several times, and dried in vacuum to obtain graphene. The invention has simple process and convenient operation, and the prepared graphene grows well, the number of layers is controllable, and the yield is considerable. |