KOH活化法高比表面积竹质活性炭的制备与表征_英文

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1、WANGXiu2fang,etal:Preparationandcharacterizationofhighspecificsurfaceareaactivatedcarbonfrombambooby⋯⋯675Preparationandcharacterizationofhighspecificsurfacearea3activatedcarbonfrombamboobychemicalactivationwithKOHWANGXiu2fang,ZHANGHui2ping,CHENHuan2qin(TheSchoolofChemicala

2、ndEnergyEngineering,SouthChinaUniversityofTechnology,Guangzhou510641,China)Abstract:HighspecificsurfaceareaactivatedcarbonwaspreparedfrombamboobychemicalactivationwithKOH.TheinfluenceofactivationparametersonthefinalproductswasinvestigatedbyvaryingtheKOH/bambooratio,activat

3、iontemperatureandholdtime.Thesampleswerecharacterizedbynitrogenadsorptionisothermsat77K.ThespecificsurfaceareaandporevolumeofactivatedcarbonwerecalculatedbyBETandt2plotmethod.Thepossibleactivationmechanismwasalsoproposed.Undertheexperimentalconditions,theoptimumconditionsf

4、orpreparinghighspecificsurfaceareaactivatedcarbonareataKOH/precur2sorratioof1.0,anactivationtemperatureof800℃andaholdtimeof2h.Withtheseexperimentalconditions,anactivatedcar223bonwithaBETsurfaceareaof2996m/gandatotalporevolumeof1.64cm/gwasproduced.Theproductisanovelmaterial

5、foradsorptionandfortheapplicationinelectricdouble2layercapacitors.Keywords:activatedcarbon;highspecificsurfacearea;chemicalactivation;KOH;bambooCLCnumber:TQ424.1Documentcode:AArticleID:100129731(2006)04206752051IntroductionElectricdouble2layercapacitorshaveattractedconside

6、rableattentionasanintermediatepowersource.Acti2vatedcarbonhaslargespecificsurfaceareaandchargescanbestored.Activatedcarbon,especiallyhighspecificsurfaceareaactivatedcarbonisasuitablematerialforthepolarizableelectrodesofelectricdouble2layercapaci2[1,2]tors,becauseofitsgoode

7、lectricconductivityandelectrochemicalstability.However,highspecificsurfaceareaandcontrolledporesizedistributionarenecessaryfortheapplicationofthosematerialsinaspecificuse.Theporoustextureoftheactivatedcarbondependsstronglyonboththeactivationprocessandthenatureofthe[3]precu

8、rsor.Activatedcarboncanbeproducedfromavarietyofrawmaterials.Amongthem,coalandagricultural