Nickel tungstate nanoparticles: synthesis, characterization and electrochemical sensing of mercury(II) ions

• Published in: Journal of materials science. Materials in electronics Vol. 30; no. 4; pp. 3574 - 3584
• Main Authors: Eranjaneya, Hanumantharayappa, Adarakatti, Prashanth Shivappa, Siddaramanna, Ashoka, Thimmanna, Chandrappa Gujjarahalli
• Format: Journal Article
• Language: English
• Published: New York Springer US 01.02.2019; Springer Nature B.V
• Subjects: Characterization and Evaluation of Materials; Chemical synthesis; Chemistry and Materials Science; Electrochemical analysis; Electrodes; Glassy carbon; Image transmission; Linearity; Materials Science; Mercury (metal); Mercury compounds; Miniaturization; Nanoparticles; Nickel compounds; Optical and Electronic Materials; Photoluminescence; Sucrose; Tungstates; Voltammetry
• ISSN: 0957-4522; 1573-482X
• DOI: 10.1007/s10854-018-00635-9

Nano particulate metal oxides gained significant research interest in recent years for various applications with the intension of exploring enhanced properties of miniaturization. In this research work, nickel tungstate nanoparticles (NiWO 4 nanoparticles) were successfully synthesized via a simple and efficient sucrose-nitrate decomposition method. The synthesized nanoparticles were characterized using various analytical techniques such as PXRD, SEM, TEM, BET measurements and FTIR. Transmission electron microscope images reveals the nearly spherical shaped nanoparticles of average particle size 15–35 nm. Photoluminescence characteristics of synthesized NiWO 4 nanoparticles were investigated at room temperature. Further, the prepared nanoparticles were utilized as glassy carbon electrode modifier for trace level electrochemical sensing of toxic mercury present in water samples. The electrochemical behavior of mercury(II) ions at modified electrode interface has been studied by cyclic voltammetry (CV) and differential pulse stripping voltammetry (DPSV). The results illustrate that, the proposed modified GCE sensor exhibits linearity between the concentration range 10–600 nM with the limit of detection 2.25 nM based on 3σ method for mercury(II) ions.