| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1244085 | Talanta | 2015 | 8 Pages |
•Synthesis of fluorescent ZnS:Mn nanoparticles at pH 11.•Coated with OH-PAMAM dendrimer of third generation.•ZnS:Mn@PAMAM-OH has been characterized and analyzed by DLS, XPS and fluorescence techniques.•The effect caused by Cd2+ ion proposed a ratiometric analytical method.•The wide range of interferences studied make suitable for sensor.
We report a nanocomposite of ZnS:Mn quantum dots and a third generation PAMAM-OH dendrimer (ZnS:Mn@PAMAM-OHG=3) which was rationalized to be used as ratiometric nanosensor for Cd2+ in aqueous solution. The nanoparticles exhibited a bright yellow-orange emission with peaks at 448 and 595 nm. The structure of ZnS:Mn was not changed after coupling with PAMAM-OH, which was evidenced by the analysis of the emission spectra of the compounds. The results confirm that the prepared fluorescence nanoparticles could selectively detect Cd2+ in aqueous solution with a limit of detection of 24.34 μM and RSD 4.07%, obtained by using the ratio I448/I595. The method was applied to different water samples.
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