资源描述
单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,*,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,*,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,*,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,*,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,*,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,*,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,*,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,*,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,*,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,*,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,*,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,*,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,The Synthesis of,Carbon Quantum Dots(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,、,Introduction,2,、,Synthetic approaches,2.1 Arc discharge method,2.2 Chemical ablation,2.3 Electrochemical carbonization,2.4 Laser ablation,2.5 Microwave irradiation,2.6 Hydrothermal/solvothermal,2.7 Template,Content,3,、,Future target,1,.,Introduction,Carbon quantum dots(CQDs)are a new class of quantum dots materials,Advantage:,1)Low toxicity,2)Biocompatibility,3)Low cost,4)Chemical inertness,5)Fluorescence properties.,Ref.1 Youfu Wang,Aiguo Hu.J.Mater.Chem.C,2014,2,69216939,2 Shi Ying Lim,Wei Shen and Zhiqiang Gao,Chem.Soc.Rew.,2015,362-281,Inorganic quantum dots,Carbon quantum dots,Great potential applications,2,.,Synthetic methods,Many methods have been proposed to prepare CQDs during the last decade,which can be roughly classified into“,Top-down,”and“,Bottom-up,”approaches,.,Ref.Youfu Wang,Aiguo Hu.J.Mater.Chem.C,2014,2,69216939,Arc discharge,soot,introduce carboxyl functional groups,suspension,CQDs,Ref.,Xu X Y，Ray R，Gu Y L，et al J Am Chem Soc，2004，126(40):12736-12737.,oxidative,gel electrophoresis method,extraction,Arc processing,2.1 Arc discharge method,carbonaceous materials,carbon source,2.2 Chemical ablation,H,2,SO,4,HNO,3,Ref.1 L.Shen,L.Zhang,M.Chen,X.Chen and J.Wang,Carbon,2013,55,343.,2 H.Peng and J.Travas-Sejdic,Chem.Mater.,2009,21,5563,Electrochemical carbonization,CQDs,solution,a degassed acetonitrile solution withTBAP,Cycled applied potential,Purification process,evaporating the acetonitrile from solution,dissolving the remaining solid in water,dialyzing the aqueous solution with a cellulose ester membrane bag,Three electrodes,2.3 Electrochemical,Ref:,1 Zheng L,Chi Y,Dong Y,et al.J Am Chem Soc,2009,131(13):4564-4565.,2 Wang Y F,Hu A J.J.Mater.Chem.C,2014,2,6921,CQDs,Experimental configuration,graphite powder,cement,carbon target,Carbon precursor,Laser,Acid treated,Ref.Sun Y P.,et al.J Am Chem Soc.2006,128(24):7756-7757.,2.4 Laser ablation,2.5 Microwave irradiation,color:,transparent(l),brown(l),dark-brown(s),(indicating the formation of C-dots),transferred to vacuum oven and heated,add distilled water to form aqueous solution,purified in a centrifuge,Ref.Zhu H,Wang X,Li Y,et al.Chem.Commun.,2009(34):5118-5120.,2.6 Hydrothermal/Solveothermal,Ref.,S.Sahu,B.Behera,T.K.Maiti and S.Mohapatra,Chem.Commun.,2012,48,8835.,saccharose,citric acid,Ref.Zhu S,Meng Q,Wang L,et al.Angewandte Chemie,2013,125(14):4045-4049.,fluorescence quench,2.7 Template,Choose a suitable template,synthesis CQDs,Acid etching template,CQDs,Ref.Ruili Liu et.al,Angew.Chem.Int.Ed.2009(48):4598 4601,TEM images of CQDs:,uniformity particle,High Quantum yield,2.High yield,3.Fluorescence,3.Future target,材料合成化学,2015-1-5,Thank you,!,
展开阅读全文