▎ 摘　　要

NOVELTY - Method for preparing graphene oxide supported ruthenium-based catalyst involves (a) mixing and dissolving concentrated sulfuric acid, potassium persulfate and phosphorus pentoxide, adding graphite powder, and stirring to obtain pre-oxidized graphite powder, (b) stirring concentrated sulfuric acid and sodium nitrate to obtain a mixed solution, adding the pre-oxidized graphite powder to the mixed solution under low temperature, adding potassium permanganate and performing a low-temperature reaction, medium-temperature reaction and high-temperature reaction, filtering, and freeze-drying to obtain graphene oxide, (c) dissolving ruthenium chloride trihydrate in water to obtain a ruthenium chloride solution, adding the graphene oxide to the ruthenium chloride solution, and stirring to a paste, and (d) roasting the dried product of step (d) under nitrogen gas, reducing the metal under hydrogen gas to obtain a graphene oxide supported ruthenium-based catalyst. USE - The method is used for preparing graphene oxide supported ruthenium-based catalyst which is used in the degradation of lignin or lignin model compounds (all claimed). ADVANTAGE - The catalyst has acidic active centers and high catalytic degradation efficiency, greatly improves the selectivity of the reaction, and is simple and cost-effective. DETAILED DESCRIPTION - Method for preparing graphene oxide supported ruthenium-based catalyst involves (a) mixing and dissolving concentrated sulfuric acid, potassium persulfate and phosphorus pentoxide, adding graphite powder, and stirring, after stirring, carrying out centrifugal filtration, and freeze drying to obtain pre-oxidized graphite powder, (b) stirring concentrated sulfuric acid and sodium nitrate evenly to obtain a mixed solution, adding the pre-oxidized graphite powder obtained in step (a) to the mixed solution under low temperature conditions and stirring evenly, adding potassium permanganate, performing a low-temperature reaction, after the low-temperature reaction is completed, performing medium-temperature reaction, after the medium-temperature reaction, adding water to perform high-temperature reaction, after the high-temperature reaction, adding water to terminate the reaction, and centrifuging, filtering, washing, and freeze-drying to obtain graphene oxide, (c) dissolving ruthenium chloride trihydrate in water to obtain a ruthenium chloride solution, adding the graphene oxide obtained in step (b) to the ruthenium chloride solution, stirring to a paste, continuously stirring and drying to obtain a graphene oxide supported ruthenium-based catalyst precursor, and (d) roasting the dried product of step (d) under nitrogen gas, reducing the metal under hydrogen gas to obtain a graphene oxide supported ruthenium-based catalyst. An INDEPENDENT CLAIM is included for use of the graphene oxide supported ruthenium-based catalyst in degradation of lignin or lignin model compounds.