▎ 摘　　要

NOVELTY - The preparation method of double-layer and/or multilayer graphene using nanopowder catalyst involves using a chemical vapor deposition method to grown graphene on a transition metal substrate under the catalytic action of nanopowder to obtain the product. USE - The method is useful for preparing double-layer and/or multilayer graphene using nanopowder catalyst. ADVANTAGE - The method enables economical preparation of double-layer and/or multilayer graphene using nanopowder catalyst, and can recycle the used nanopowder catalyst so that no graphene is deposited on the nanopowder catalyst.