Ternary deep eutectic solvent modified cadmium selenide quantum dots as a selective fluorescent probe for sensing of uranyl ions in water samples

نویسندگان_
نشریهJournal of Molecular Liquids
شماره صفحات113753-113763
شماره سریال316
شماره مجلد20
ضریب تاثیر (IF)3.648
نوع مقالهFull Paper
تاریخ انتشار2020
رتبه نشریهISI
نوع نشریهچاپی
کشور محل چاپهلند
نمایه نشریهJCR،Scopus

چکیده مقاله

A single step hydrothermal approach for the synthesis of CdSe QDs using green precursor materials with the assistance of urea-thioglycolic acid-choline chloride ternary deep eutectic solvent (TDES-CdSe QDs) in an aqueous solution is reported. The fluorescent TDES-CdSe QDs probe was successfully applied to the fast and selective detection of uranyl ions. It was found that the fluorescence emission of the probe was dramatically quenched by uranyl ions, while other ions had no significant influence on the fluorescence intensity of the DES-CdSe QDs. The nanoprobe was systematically characterized by FTIR, XRD, TEM and EDX analysis. Some key factors affecting the performance of TDES-CdSe QDs probe were optimized using response surface methodology based on face centered central composite design. Under the optimal conditions, the DES-CdSe QDs probe provided a linear response to uranyl ions in the concentration range from 10 to 500 nM with a limit of detection 5.7 nM. The relative standard deviation (RSD%) of the developed method for five replicate determinations of uranyl ions at 100 nM was estimated to be 1.9%. In addition, the proposed method was successfully explored to the uranyl ions quantitation in environmentally water samples and desirable results were achieved.

لینک ثابت مقاله

tags: Uranyl ions; Ternary deep eutectic solvent; CdSe QDs; Fluorescent probe; Face centered central composite design