A novel high-performance electrocatalytic determination platform for voltammetric sensing of eugenol in acidic media using pyrochlore structured lanthanum stannate nanoparticles

Abstract

Owing to the enhanced electrical conductivity, sensitivity, selectivity, cost-effective, and simple sampling methods, rare-earth pyrochlore structured stannates (M2Sn2O7) have been referred to as an elegant system for electrochemical sensing applications. Because of this, novel pyrochlore structure lanthanum stannate nanoparticles (La2Sn2O7 NPs) was synthesized via an eco-friendly method and further characterized through various spectroscopic & microscopic techniques. The electrocatalytic property of La2Sn2O7 NPs was examined by fabricating it over a glassy carbon electrode (La2Sn2O7 NPs/GCE) in acidic media as a working electrolyte. The effect of variables such as the amount of La2Sn2O7 NPs suspension and pH of the solution was optimized. Subsequently, after optimizing measurement conditions, the proposed La2Sn2O7 NPs sensor shows excellent selectivity, sensitivity, linear ranges (0.01 to 127 mu M & 127-1437 mu M), the limit of detection (6 nM) and limit of quantification (0.10 mu M). The active sites, presence of metal oxide bonds, higher resistivity, and faster electron mobility paid away for the enhanced electrocatalytic activity of the proposed sensor. Furthermore, the La2Sn2O7 NPs act as promising electrode modifiers for real sample investigation of clove samples with accepted recovery rates (86-98%). Hence, the La2Sn2O7 NPs sensor act as a hopeful electrode modifier for the determination of eugenol. (C) 2021 Published by Elsevier B.V. on behalf of The Korean Society of Industrial and Engineering Chem-istry.