DETECTION OF ZINC IN WATER USING CADMIUM TELLURIDE QUANTUM DOTS

Abstract

The detection of zinc in water was possible owing to the successful synthesis of quantum dots. CdTe Quantum were synthesized using the conventional Reflux method. In the hydride generation solid phase extraction setup (HG-SPE), zinc underwent a basic hydride generation process to produce zinc hydride (ZnH2). The generated hydrides interacted with the quantum dots placed on the glass slides, suspended inside them. After the reaction, the quantum dots fluorescence intensity was evaluated. After interacting with zinc, the quantum dots fluorescence was quenched. After the reaction, the quantum dots' fluorescence intensity was evaluated. When the quantum dots reacted with zinc, their fluorescence was quenched. The quantum dots displayed a peak at 555nm, 580nm, and 655nm in wavelength.The as synthesized Quantum dots were compared and quantum dots having synthesized time 18 hours having higher quenching rate than the quantum dots synthesized at lesser time period. CdTe QDs was further studied to carry out the analytical experiments. The limit of quantification (LOQ) measured in the linear range of 0-100 µgL-1 was 10 µgL-1 . The applied methodology is cheap, simple, requires low sample consumption and is highly selective