The invention discloses a method for preparing a
lotus leaf carbon nanometer material. The method specifically includes the following steps that firstly, after being collected,
lotus leaves are selected, subjected to
impurity removal, cleaned, freeze-dried, smashed and screened, and 50-100-mesh
lotus leaf
powder is prepared; secondly, the lotus leaf
powder is placed in an
inert gas
atmosphere and the like to prepare a pre-
carbonization product; thirdly, an activating agent is added into the pre-
carbonization product to prepare a precursor, the precursor is dried for 6-12 h at 50-100 DEG C, and an
intermediate product is prepared; fourthly, the
intermediate product is subjected to heat treatment to prepare a product I; fifthly, the product I is processed through the acid leaching method, and the lotus leaf carbon nanometer material is prepared. The lotus leaves are used for preparing the carbon nanometer material, a new
biomass carbon material preparation method is disclosed, raw materials are rich, the preparation process is simple,
pollution is not caused, and quantitative production can be achieved.