▎ 摘　　要

NOVELTY - Producing carbon-containing material from coffee grounds, comprises (a) preparing coffee grounds; (b) generating carbon bodies from the coffee grounds prepared in step (a); and (c) reacting the carbon body produced in the step (b) with a decomposing agent. USE - The method is useful to produce carbon-containing material in composite (claimed) for energy field, electronic field, precision machine field, high-temperature machine field, medical field, food field, cosmetic field, and wastewater treatment field. ADVANTAGE - The method produces carbon-containing material with high yield and high purity; and improves recyclability of coffee grounds and converted into high value-added materials. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) carbon-containing material produced by the above method, where the carbon-containing material includes graphene, graphene allotropes, graphene derivatives, carbon nanotubes, carbon nanotube derivatives, and/or aromatic hydrocarbons; (2) carbon-containing material is obtained by synthesizing at least one carbon precursors containing chromanediol-based compound of formula (I) and isochromanone-based compound of formula (II) among the components contained in coffee grounds; and (3) composite comprising the carbon-containing material. Ra1 and Rb1 = H, OH, aliphatic hydrocarbon, aromatic hydrocarbon or OCOR'; R' = aliphatic hydrocarbon or aromatic hydrocarbon; and R1, R2 and R3 = H, OH, aliphatic hydrocarbon, aromatic hydrocarbon, CHO or COOH.