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Single-walledcarbonnanotubes(SWCNTs)inlarge-scaleweresynthesizedbyanarcdischargingfurnaceatcontrolledtemperaturewithFe-Ni-Mgpowdersascatalystat600℃.Asimpletwo-steppurificationmethodwascarriedout.First,as-grownSWNTwasheatedinairat500℃for30min,thensoakedthemin37%hydrochloricacidfor72handfilterwithdeionizedwater.Micro-analysiswascarriedoutbySEM,TGA,HRTEMandRamanspectroscopy.TheresultsindicatethatthepurityofSWNTsishigherthan95%andthediameterrangeisfrom1.24nmto1.38nm. |
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