欢迎您！东篱公司
退出
-
申报数据库
-
立项数据库
-
成果数据库
-
项目获奖数据库
中文摘要：
在水相中制备了聚乙烯亚胺（PEI）包裹的水溶性PEI-CdZnTe量子点。研究了反应时间,酸度及不同常见金属离子对PEI-CdZnTe量子点荧光效率的影响。基于Pb^2＋对CdZnTe量子点具有选择性荧光猝灭作用,建立了用CdZnTe量子点为探针灵敏测定痕量Pb^2＋的新方法。研究了不同浓度Pb^2＋对CdZnTe量子点荧光强度猝灭情况,结果表明,Pb^2＋对CdZnTe量子点的荧光猝灭过程可以很好地用Stern-Volmer荧光猝灭方程来描述。当Pb^2＋浓度在0.05～3.0μg·mL^-1范围内,CdZnTe量子点的荧光强度F_0/F与Pb^2＋浓度之间具有较好的线性关系,线性相关系数为0.998 8,检测限为0.01μg·mL^-1。该量子点荧光分析方法简便快速、灵敏度高、选择性好,能够应用于实际水样中Pb^2＋的分析与测定。
英文摘要：
Water-soluble CdZnTe quantum dots（QDs）were firstly synthesized by using 3-mercaptopropionic acid（MPA）as modifier in aqueous phase.Then,CdZnTe quantum dots were capped with polyethyleneimine（PEI）with electrostatic interaction and condensation reaction between carboxyl group on the surface of QDs and amino group of PEI,and several metal ions were tested to check if they affect the fluorescence properties of CdZnTe QDs in the paper.A novel method to detect trace Pb^2＋ has been developed based on the selective fluorescence quenching Pb^2＋ to PEI-CdZnTe QDs.Fluorescence quenching effect of PEICdZnTe QDs had been studied by increasing the Pb^2＋ concentration.The study results show that fluorescence quenching process of Pb^2＋ can be described well by Stern-Volmer fluorescence quenching equation.There is a good linear relationship between the fluorescence intensity F_0/F and the concentration of Pb^2＋ when the concentration of Pb^2＋ is in the ranges of 0.05~3.0μg·mL^-1.The linear correlation coefficient and the detection limits are 0.998 8and 0.01μg·mL^-1,respectively.The proposed fluorescence method of detection is simple,rapid and sensitive,which has been successfully applied to the detection of Pb^2＋ in tap water.
同期刊论文项目
同项目期刊论文
~Phase transformation synthesis of novel Ag2O/Ag2CO3 heterostructures with high visible light effici
~Hydrothermal synthesis and characterization of novel PbWO4microspheres with hierarchical nanostruct
A sonochemical route to fabricate the novel porous F, Ce-codoped TiO2 photocatalyst with efficient p
Thermal stability, microstructure and photocatalytic activity of the bismuth oxybromide photocatalys
~Stable Au25(SR)18/ TiO2 Composite Nanostructure with Enhanced Visible Light Photocatalytic Activity
~Novel hollow Pt-ZnO nanocomposite microspheres with hierarchical structure and enhanced photocataly
~Novel noble metal (Rh, Pd, Pt)/BiOX(Cl, Br, I) composite photocatalysts with enhanced photocatalyti
~Synthesis and characterization of Ag/TiO2-B nanosquares with high photocatalytic activity under vis
~Preparation of Co/CexTi1-xO2 Catalysts and Their Catalytic Performance in the Catalytic Partial Oxi
Fast fabricate Co3O4 or CuO/BiVO4 composite photocatalysts with high crystallinity and enhanced phot
An efficient palladium membrane reactor for increase the yield of styrene in ethylbenzene dehydrogen
Preparation of bismuth oxyiodides and oxides and their photooxidation characteristic under visible/U
~Preparation, characterization and photocatalytic performance of noble metals (Ag, Pd, Pt, Rh) depos
期刊信息
位置：