▎ 摘　　要

NOVELTY - Preparing manganese-cerium-doped graphene catalyst comprises (i) adding manganese nitrate tetrahydrate, cerous nitrate hexahydrate and urea into container, adding deionized water, stirring and dissolving to obtain mixed solution-A, adding graphite oxide into another container, adding deionized water, and ultrasonically dispersing to obtain graphene oxide dispersion-B, adding mixed solution-A dropwisely into graphene oxide dispersion-B under ultrasonic conditions, and ultrasonically treating to obtain mixed solution-C, (ii) placing mixed solution-C in a constant temperature water bath for homogeneous precipitation reaction to obtain mixed solution-D, and (iii) transferring mixed solution-D into a hydrothermal kettle for hydrothermal reaction, filtering solution, washing precipitate, drying, placing in a tube heating furnace, and subjecting to high temperature heat treatment under a nitrogen atmosphere. USE - The catalyst is useful in a low-temperature SCR flue gas denitration system (claimed). ADVANTAGE - The catalyst has good low temperature catalytic activity. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for manganese-cerium-doped graphene low-temperature SCR denitration catalyst prepared by the above method.