在油胺溶剂中利用溶剂热法于60℃加热反应6 h，合成了ZnS量子点，并用正硅酸乙酯（TEOS）对合成的ZnS量子点进行功能化修饰，并以功能化后的量子点为荧光探针测Cd²⁺离子。考察了pH对体系荧光强度的影响。pH为7.4时，在3.0×10^-6~1.0×10^-5 mol/L范围内，线性方程为F₀/F=0.792+0.06ρ_Cd²⁺，检出限为4.7×10^-7 mol/L，相关系数R=0.989 4，RSD=0.024（n=8）。并用于检测实验室废水中Cd²⁺离子的浓度。

The ZnS quantum dots are synthesized by using solvothermal method in oil amine solvent at 160℃ for 6 h. The obtained ZnS quantum dots are functionalized through being modified by tetraethyl orthosilicate (TEOS). The functionalized quantum dots are used as fluorescence probes for the determination of Cd²⁺ ions. The influence of pH value on the fluorescence intensity in the system is investigated. When pH is 7.4, the linear equation is F₀/F=0.792+0.06ρ_Cd²⁺ in the range of 3.0×10^-6 mol·L^-1-1.0×10^-5 mol·L^-1, the detection limit is 4.7×10^-7 mol·L^-1, the correlation coefficient is 0.989 4 and RSD is 0.024 (n=8). The functionalized quantum dots are also used to detect the concentration of Cd²⁺ ions in laboratory wastewater.

韩蕾(1993-),女,本科生,主要研究方向为材料合成,1225633172@qq.com。