Large scale electrochemical synthesis of high quality carbon nanodots and.pdf

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1、ViewArticleOnline/JournalHomepage/TableofContentsforthisissueDynamicArticleLinksDaltonTransactionsCitethis:DaltonTrans.,2012,41,9526www.rsc.org/daltonPAPERLargescaleelectrochemicalsynthesisofhighqualitycarbonnanodotsandtheirphotocatalyticpropertyHaiMing,ZhengMa,YangLiu,*KemingPan,HangYu

2、,FangWangandZhenhuiKang*Received10thFebruary2012,Accepted30thMay2012DOI:10.1039/c2dt30985hHighqualitycarbonnanodots(C-dots)withhighpurityweresynthesizedthroughamild,one-stepelectrochemicalapproach,withouttheassistanceofanychemicalsbutonlypurewater.Thishighproductivitymethodmakesthesynth

3、eticprocessofC-dotssynthesisbotheconomicalaswellasenvironment-friendly.TheaspreparedC-dotsarepredominantlymulti-layergrapheneoxide,withluminescenceandhighup-conversionphotoluminescence(emissionoflightatshorterwavelengthsthantheexcitationwavelength).Meanwhile,C-dotsshowedperoxidisemimeti

4、cfunctionandvisible-light-sensitivephotocatalyticactivityformethylorangedegradation.Inaddition,anovelphotocatalyst(TiO2/C-dots)wasobtainedbycombiningC-dotswithTiO2throughaneasyhydrothermalmethod.Remarkably,TiO2/C-dotsexhibitedanexcellentvisible-lightphotocatalyticactivity.1.Introduction

5、highlydesiredforthesynthesisofhighqualityC-dots,whichcanpromotetheirfurtherapplicationsinbroadfieldssuchasCarbonnanodots(C-dots),anewformofnanostructuredcatalysis,sensors,biologicallabeling,andsolarcells.carbons,consistofafascinatingclassofrecentlydiscoveredHerein,wepresentafacileelectro

6、chemicalapproachforthenanocarbonsdisplayingabundantphoto-physicalproperties,large-scalesynthesisofhighqualityC-dotswithhighpurity,inespeciallythestrongsize-andexcitationwavelength-dependentwhichonlypurewaterisusedastheelectrolytewithoutanyphotoluminescence(PL)propertiesanduniqueup-conve

7、rtedPLotherchemicaladditives.Theas-obtainedC-dotsfeatureahighPublishedon01June2012.Downloadedon25/07/201320:26:49.behavior.Asaconsequenceofthehealthconcerns,thepotentialcrystallinenature,excellentaqueousdispersibility,remarkableenvironmentalandbiologicalhazardsofthetraditionals