碳量子点(CQDs)的合成ppt课件.ppt

TheSynthesisofCarbonQuantumDots CQDs speaker 叶江林 组员 汪冬冬叶江林王长来章小同杜娟高峰魏绍娟郭亚丽潘世友刘克潘祺 材料合成化学2015 1 5 1 1 Introduction 2 Syntheticapproaches 2 1Arcdischargemethod2 2Chemicalablation2 3Electrochemicalcarbonization2 4Laserablation2 5Microwaveirradiation2 6Hydrothermal solvothermal2 7Template Content 3 Futuretarget 2 1 Introduction Carbonquantumdots CQDs areanewclassofquantumdotsmaterials Advantage 1 Lowtoxicity 2 Biocompatibility 3 Lowcost 4 Chemicalinertness 5 Fluorescenceproperties Ref 1YoufuWang AiguoHu J Mater Chem C 2014 2 6921 69392ShiYingLim WeiShenandZhiqiangGao Chem Soc Rew 2015 362 281 Inorganicquantumdots Carbonquantumdots 3 Greatpotentialapplications 4 2 Syntheticmethods ManymethodshavebeenproposedtoprepareCQDsduringthelastdecade whichcanberoughlyclassifiedinto Top down and Bottom up approaches Ref YoufuWang AiguoHu J Mater Chem C 2014 2 6921 6939 5 Ref XuXY RayR GuYL etal JAmChemSoc 2004 126 40 12736 12737 oxidative gelelectrophoresismethod extraction Arcprocessing 2 1Arcdischargemethod 6 carbonaceousmaterials carbonsource 2 2Chemicalablation H2SO4 HNO3 Ref 1L Shen L Zhang M Chen X ChenandJ Wang Carbon 2013 55 343 2H PengandJ Travas Sejdic Chem Mater 2009 21 5563 7 Electrochemicalcarbonization CQDs 8 Experimentalconfiguration 9 Laser Acidtreated Ref SunYP etal JAmChemSoc 2006 128 24 7756 7757 2 4Laserablation 10 2 5Microwaveirradiation color transparent l brown l dark brown s indicatingtheformationofC dots transferredtovacuumovenandheated adddistilledwatertoformaqueoussolution purifiedinacentrifuge Ref ZhuH WangX LiY etal Chem Commun 2009 34 5118 5120 11 2 6Hydrothermal Solveothermal Ref S Sahu B Behera T K MaitiandS Mohapatra Chem Commun 2012 48 8835 saccharose citricacid 12 Ref ZhuS MengQ WangL etal AngewandteChemie 2013 125 14 4045 4049 fluorescencequench 13 2 7Template Chooseasuitabletemplate synthesisCQDs Acidetchingtemplate CQDs Ref RuiliLiuet alAngew Chem Int Ed 2009 48 4598 4601 14 TEMimagesofCQDs unifor