Fabrication of CdSe quantum dots @ nickel hexacyanoferrate core–shell nanoparticles modified electrode for the electrocatalytic oxidation of hydrazine

• Published in: Journal of materials science. Materials in electronics Vol. 29; no. 23; pp. 20146 - 20155
• Main Authors: Kalaivani, A., Narayanan, S. Sriman
• Format: Journal Article
• Language: English
• Published: New York Springer US 01.12.2018; Springer Nature B.V
• Subjects: Cadmium selenides; Characterization and Evaluation of Materials; Chemistry and Materials Science; Core-shell particles; Electrochemical analysis; Electrochemical impedance spectroscopy; Electrodes; Fourier transforms; Hydrazines; Materials Science; Nanoparticles; Nickel; Optical and Electronic Materials; Oxidation; Quantum dots; Spectrum analysis; Transmission electron microscopy
• ISSN: 0957-4522; 1573-482X
• DOI: 10.1007/s10854-018-0147-1

We have reported an efficient method to immobilize the electroactive nickel hexacyanoferrate (NiHCF) on CdSe quantum dots (QDs). CdSe QDs @ NiHCF core–shell nanoparticles (NPs) were successfully synthesized and characterized using Fourier transform infrared spectroscopy and transmission electron microscopy. A simple, stable and reproducible CdSe QDs @ NiHCF NPs modified electrode has been constructed as a sensing platform for the electrochemical determination of hydrazine. The electrochemical behavior of CdSe QDs @ NiHCF NPs modified electrode was studied by cyclic voltammetry and electrochemical impedance spectroscopy. Under optimal condition the modified electrode exhibits well defined redox peaks at a formal potential of 0.31 V which corresponds to the redox reaction of hexacyanoferrate (II/III) of NiHCF. The sensor showed an enhanced electrocatalytic activity towards the oxidative determination of hydrazine in the concentration range of 1.6–1300 µM with the detection limit of 0.5 µM. The sensor has been tested for analysis of real samples, which makes it useful in practical area of environmental applications.