One pot and ecofriendly synthesis of Cdse Qds and their characterization and application for ultrasensitive and determination of copper (II) in real samples

Abstract

One of the heavy metal ions is copper ion (Cu2+) which is an essential element in many physiological and pathological processes including cell respiration and bone formation. On other hand, Cu2+ at high concentrations can be harmful owning to damage of central nervous system that led to Wilson and Parkinson diseases [1]. The United States Environmental Protection Agency (EPA) regulated Cu2+ concentration in drinking water should not exceed an action level of 20 µM (1.3 ppm) [2]. Therefore, analysis of low concentration of Cu2+ ions by a method with a low cost, rapid response and simple operation is high demand. Until now, various atomic analytical techniques have been utilized for the determination of Cu2+ ions, including graphite furnace atomic absorption spectrometry (GFAAS) [3], flame atomic absorption spectrometry (FAAS) [4], inductively coupled plasma-optical emission spectrometry (ICP-OES) [5], and inductively coupled plasma-mass spectrometry (ICP-MS) [6]. In the present study, a facile and new fluorescent probe based on deep eutectic solvent capped CdSe QDs (DES-CdSe QDs) for the fast sensing of Cu2+ ions was reported. The DES-CdSe QDs were prepared in aqueous phase in one step procedure under ambient atmosphere. The DES-CdSe QDs was extensively characterized using FT-IR, and UV-Vis spectroscopy,transmission electron microscopy and x-ray energy dispersive analysis.