▎ 摘　　要

NOVELTY - Metal atom high doping amount single atom catalyst, is claimed. The metal atom high doping amount single atom catalyst is obtained by heat treatment of metallocene-modified two-dimensional material, the metallocene-modified two-dimensional material is obtained by chemically reacting metallocene derivatives and two-dimensional materials through covalent bonding. USE - The catalyst is useful in sewage treatment (claimed). ADVANTAGE - The catalyst: has both high doping amount of metal atoms and excellent catalytic activity, and has very high use value in the field of sewage treatment. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing the metal atom high doping amount single atom catalyst comprising (1) preparing two-dimensional material with functional group; (2) weighing the metallocene derivative and the two-dimensional material obtained in step (1) respectively, and ultrasonically dispersing them in absolute ethanol to obtain uniform dispersion; (3) reacting the homogeneous dispersion obtained in step (2) in protective atmosphere, natural cooling, centrifuging and separating to obtain metallocene-modified two-dimensional material powder; and (4) heat-treating the metallocene-modified two-dimensional material powder obtained in step (3) under a protective atmosphere.