水分散纳米CdS的制备及对水中Cu^(2+)的荧光检测  

Preparation of Water-Dispersible Cadmium Sulphide Nanoparticles and Its Fluorescence Detection of Cu^(2+) in Water

作　　者：钟昀[1] 刘永长[1] 杨海舰[1] 方智利[1] 

机构地区：[1]华东交通大学理学院,江西南昌330013

出　　处：《华东交通大学学报》2016年第3期115-120,共6页Journal of East China Jiaotong University

基　　金：国家自然科学基金项目(21365012)

摘　　要：以柠檬酸为表面修饰剂,在室温、大气的环境下,合成CdS纳米溶胶,并通过实验探讨制备CdS纳米溶胶的最佳物料配比、最佳pH值及所受温度的影响。实验表明,Cu^(2+)会导致硫化镉量子点荧光淬灭,淬灭程度达到73%。相对荧光强度ΔF与InC(Cu^(2+))呈良好的线性关系,且硫化镉量子点对Cu^(2+)的选择性较高。所制备的CdS纳米溶胶荧光性质稳定,可应用于水样中痕量铜的检测。In this paper, CdS nanoparticles were synthesized by citric acid as the surface modifying agent, and the best material ratio, the optimum pH value and the temperature were investigated by experiments. Experimental results showed that the Cu^（2＋） could lead to fluorescence quenching of cadmium sulfide quantum dots, and the quenching degree could reach 73%. There was a good linear relationship between relative fluorescence intensity（ΔF） and InC（Cu^（2＋））, and cadmium sulfide quantum dots had a high selectivity for Cu^（2＋）. The nano CdS had stable fluorescence property and could be used for the detection of trace copper in water samples.

关 键 词：纳米硫化镉 水分散 柠檬酸 铜离子检测 

分 类 号：O648.16[理学—物理化学]