%0 Journal Article
%T Catalyticperformanceofheteroatom-modifiedcarbonnanotubesinadvancedoxidationprocesses
%A Jo£¿
%A o Restivo
%A Raquel P. Rocha
%A Adri¨¢
%A n M. T. Silva
%A Jos¨¦
%A J. M. ¨®
%A rf£¿
%A o
%A Manuel F. R. Pereira
%A Jos¨¦
%A L. Figueiredo
%J ´ß»¯Ñ§±¨
%P 896-905
%D 2014
%R 10.1016/S1872-2067(14)60103-0
%X £¿Multi-walledcarbonnanotubes(CNTs)weresubmittedtochemicalandthermaltreatmentsinordertoincorporatedifferentheteroatomsonthesurface.O-,S-andN-containinggroupsweresuccessfullyintroducedontotheCNTswithoutsignificantchangesofthetexturalproperties.Thecatalyticactivityoftheseheteroatom-modifiedCNTswasstudiedintwoliquidphaseoxidationprocesses:catalyticozonationandcatalyticwetairoxidation(CWAO),usingoxalicacidandphenolasmodelcompounds.Inbothcases,thepresenceofstronglyacidicO-containinggroupswasfoundtodecreasethecatalyticactivityoftheCNTs.Ontheotherhand,theintroductionofSspecies(mainlysulfonicacids)enhancedtheremovalrateofthemodelcompounds,particularlyintheCWAOofphenol.Additionalexperimentswereperformedwitharadicalscavengerandsodiumpersulfate,inordertoclarifythereactionmechanism.NitrogenfunctionalitiesimprovethecatalyticperformanceoftheoriginalCNTs,regardlessoftheprocessorofthepollutant.
%K Advancedoxidationprocesses
%K Catalyticozonation
%K Catalyticwetairoxidation
%K Sulfurgroups
%K Nitrogengroups
%K Oxygengroups
%K Carbonnanotubes
%K Surfacechemistry
%U http://www.chxb.cn/CN/abstract/abstract21345.shtml