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催化学报 2011
DirectHydroxylationofBenzenetoPhenoloverFe3O4SupportedonNanoporousCarbonDOI: 10.1016/S1872-2067(10)60173-8, PP. 258-263 Keywords: nanoporouscarbon,ferroferricoxide,hydroxylationofbenzene,phenol Abstract: ？Fe3O4/CMK-3waspreparedbyimpregnationandusedasacatalystforthedirecthydroxylationofbenzenetophenolwithhydrogenperoxide.TheironspeciesinthepreparedcatalystwasFe3O4becauseofthepartialreductionofiron(III)toiron(II)onthesurfaceofCMK-3.ThehighcatalyticactivityofthecatalystarisesfromtheformationofFe3O4onthesurfaceofCMK-3andthehighselectivityforphenolisattributedtotheconsumptionofexcesshydroxylradicalsbyCMK-3.Theeffectoftemperature,reactiontime,volumeofH2O2,andamountofcatalystonthecatalyticperformanceofthepreparedcatalystwereinvestigated.Underoptimizedconditions,thecatalystshowedexcellentcatalyticperformanceforthehydroxylationofbenzenetophenoland18%benzeneconversionwasachievedwith92%selectivityforphenolandwithaTOFvalueof8.7h-1.Thestabilityofcatalystwasinvestigatedbydeterminingitsactivityafterthefourthrunanditwasfoundtohavedecreasedto80%ofthefreshcatalyst’sactivity.
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