Electroanalytical methods, due to its simplicity and prompt response, low cost and relatively high sensitivity and selectivity, are shown to be good alternative analytical techniques for characterization and quantification of different nanoparticles (NPs) in water environment. Several experiments were designed to monitor in parallel to voltammetric and amperometric measurements, physico-chemical and surface characteristics (ζ – potential and size) of the studied metal sulphide NPs (FeS, PbS, Ag<sub>2</sub>S, CdS) under same experimental conditions. It was shown that electrochemical signals produced by studied NPs from bulk solution and measured by DLS, ζ - potential and size of the the same NPs, are changing with electrolyte concentrations as well as with its composition. Our measurements indicate significant relationship between measured ζ - potential and size of the studied metal sulphide NPs dispersions and recorded voltametric and amperometric peak charges, indicating great potential of electroanalytical chemistry in characterization of physico-chemical and surface chemistry features of the metal sulphide NPs in water environment. The best electrochemical response is obtained in presence of the smaller NPs, &lt;100 nm.

Electroanalytical methods in characterization of metal sulphide nanoparticles in water environment

253rd National Meeting (2017)

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