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Nano Research

Article Title

One-pot synthesis of highly luminescent CdTe quantum dots by microwave irradiation reduction and their Hg2+-sensitive properties

Keywords

CdTe, quantum dots, microwave irradiation, ? uorescent, sensor, mercury

Abstract

A facile one-pot microwave irradiation reduction route has been developed for the synthesis of highly luminescent CdTe quantum dots using Na TeO as the Te source in an aqueous environment. The synthesis 2 3 parameters of this simple and rapid approach, including the reaction temperature and time, the pH of 2+ the reaction solution and the molar ratio of the 3-mercaptopropionic acid (MPA) stabilizer to Cd , have considerable in? uence on the particle size and photoluminescence quantum yield of the CdTe quantum dots. The photoluminescence quantum yield of CdTe quantum dots prepared using relatively short reaction times (10 40 min) reached 40 60 (emission peaks at 550 640 nm). Furthermore, the resulting products could be % % 2+ used as ? uorescent probes to detect Hg ions in aqueous media. The response was linearly proportional to the 2+ 9 6 9 concentration of Hg ion in the range 8.0!á1 mol L to 2.0!á1 mol L with a detection limit of 2.7!á1 mol L. / / /

Graphical Abstract

Publisher

Tsinghua University Press

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