Zinc oxide nanostructured platform for electrochemical detection of heavy metals

Abstract

ZnO nanoparticles (ZnO‐NP) were prepared by a facile precipitation technique using di‐isopropyl amine as precipitating agent. The morpho‐structure and porosity of the as‐prepared nano‐powder were investigated by FT‐IR analysis, X‐ray diffraction (XRD), scanning electron microscopy (SEM), and BET analysis. By drop‐casting, a composite film was deposited to obtain ZnO‐NP‐Nafion/GCE modified electrode. The modified electrode was investigated by cyclic voltammetry, electrochemical impedance spectroscopy, and square wave anodic stripping voltammetry (SWASV) for the detection of Pb2+, Cd2+, Cu2+, and Fe3+, and it was successfully applied for the detection of Pb2+ and Cu2+ in real water samples.

Novel Aspects in the Voltametric Determination of Heavy Metals: A Minireview

“…For the same purpose, a sensitive glassy carbon electrode has also been formed and shaped by the ZnO and Nafion nanostructure (ZnO-NP-Nafion/GCE). In a solution of 0.1 M KCl and 5 mM [Ru(NH3)6]3 were made measurements and it appeared that the working electrode is a sensitive electrode, with good electrochemical characteristics and efficient analytical parameters for the detection of heavy metals, and gave low LOD limits equal to 11.88 nM (Pb), 16.21 nM (Cd) and 47.33 nM (Cu) [61].…”

Fluorescent Nitrogen‐Doped Carbon Dots as Nanosensors for the Detection of Fe3+ Ions

“…At present, several traditional approaches including atomic emission or absorption spectrometry, inductively coupled plasma mass spectrometry (ICP-MS), and electrochemical methods have been fabricated for detecting Fe 3þ ions with high sensitivity and accuracy, [10][11][12][13][14][15] but the aforementioned techniques require expensive equipment, and cumbersome sample pretreatment, which are not convenient enough to be broadly applied to field detection. Compared with traditional methods, fluorescence (FL)-based detection methods have been widely selected owing to their facile operation, simplicity, rapidity, low cost, and limit of detection (LOD).…”