Mani Sakthivel

One pot synthesis of CeO2 nanoparticles on a carbon surface for the practical determination of paracetamol content in real samples

Using the effect of interactions between metal oxides and carbon materials is considered an attractive way to make novel composites for electrochemical sensor applications. Both metal oxides and carbon materials have good electrocatalytic properties that can be used for the sensing of different components such as organic/inorganic pollutants, drugs and molecules. These sugar base-derived carbon decorated with CeO2 nanoparticles (CeO2–C) was prepared using a one pot synthesis and used for the electrochemical sensing of paracetamol (PA). The as-prepared CeO2–C was characterized using different techniques and electrochemical studies. The resulting calculated values of sensitivity, linear range and limit of detection were 262 μA mM−1 cm−2, 1 μM to 1.2 mM and 0.07 μM, respectively. Eventually, CeO2–C is predicted to be a suitably active material for practical applications.

Simple synthesis of cobalt sulfide nanorods for efficient electrocatalytic oxidation of vanillin in food samples.

Well-defined CoS nanorods (NR) were synthesized using a simple hydrothermal method, and were tested as an electrode material for electro-oxidation of vanillin. The NR material was characterized with regard to morphology, crystallinity, and electro-activity by use of appropriate analytical techniques. The resulting CoS NR@Nafion modified glassy carbon electrode (GCE) exhibited efficient electro-oxidation of vanillin with a considerable linear range of current-vs-concentration (0.5-56μM vanillin) and a detection limit of 0.07μM. Also, food samples containing vanillin were studied to test suitability for commercial applications.

Entrapment of bimetallic CoFeSe 2 nanosphere on functionalized carbon nanofiber for selective and sensitive electrochemical detection of caffeic acid in wine samples

The ever-increasing requirement of an electrochemical sensor in various paramedical and industrial applications, the recent research is motivated to fabricate a new type of electrode material with unique electrochemical properties for quantitative detection of various target analytes. Recently, the metal diselenides have been interested in a broad range of electrochemical applications due to their interesting electrocatalytic performances. Despite the metal diselenides have been widely focused on hydrogen evolution reaction (HER) and oxygen reduction reaction (ORR), it is not much focused on electrochemical sensor. For the first time, the bimetallic cobalt-iron diselenide nanosphere entrapped functionalized carbon nanofiber (CoFeSe2/f-CNF) composite have been synthesized by using simple hydrothermal synthesis and used as an electrode material for efficient electrochemical detection of caffeic acid (CA). The functionalization of CNF and the formation of CoFeSe2/f-CNF nanocomposite have been successfully scrutinized by using Fourier transform infrared spectroscopy, Raman spectroscopy, X-ray powder diffraction, transmission electron microscopy and scanning electron microscopy, energy dispersive X-ray spectroscopy, and X-ray photoelectron spectroscopy. In addition, the electrochemical properties of CoFeSe2/f-CNF modified glassy carbon electrode (GCE) towards CA sensing were investigated by using cyclic voltammetry, differential pulse voltammetry and electrochemical impedance spectroscopy. As the result of the electrochemical studies, the developed CoFeSe2/f-CNF/GCE sensor exhibits very low detection limit (0.002 μM) and better sensitivity (2.04 μA μM-1 cm-2) of CA. And also, CoFeSe2/f-CNF/GCE sensor shows the feasible detection of CA in red wine samples, it reveals the excellent practicability of CoFeSe2/f-CNF/GCE.

One-step synthesis of porous copper oxide for electrochemical sensing of acetylsalicylic acid in the real sample

A Facile approach of one-step synthesis was employed to prepare porous CuO at different annealing temperature and characterized by using numerous analytical techniques. Moreover, the electrochemical sensing application of CuO modified glassy carbon electrode was studied and recorded using various electrochemical techniques. From the results, it was interpreted that the CuO prepared at 350°C exhibits satisfactorily electrochemical determination of Acetylsalicylic acid (ASA) with unique sensitivity, linear range and limit of detection of about 831.65µA mM-1cm-2, 0.1-714µM and 0.037µM respectively. The proposed sensor also shows good electrocatalytic performance in real sample analysis with acceptable results.

Facile synthesis of perovskite-type NdNiO3 nanoparticles for an effective electrochemical non-enzymatic glucose biosensor

The detailed facile synthesis and material characterizations of NdNiO3 nanoparticles for a non-enzymatic glucose sensor application were discussed briefly in this paper. The NdNiO3 nanoparticles that were prepared by facile synthesis show unique properties with excellent electrochemical performance and exhibit a low detection limit, as low as 0.3 μM, with an ultra-high sensitivity of 1105.1 μA mM−1 cm−2. They were commercially suitable for real-time application in a non-enzymatic glucose sensor.