Effect of Silver-Nanocrystalline Impregnated on Graphite Electrode in Catalyzing Thiamethoxam Reduction

Abstract

This work describes the catalytic property of silver nanoparticles decorated graphite electrode (Ag−CPE) for the thiamethoxam reduction. The prepared powders were characterized by X-ray diffraction (XRD), and the crystallite size of silver nanoparticles was calculated by the Scherrer equation. On the other hand, the electrochemical techniques were employed to study the nanoparticles size effect on the electrocatalytic reduction of thiamethoxam (TMX). The reduction current was proportional to thiamethoxam concentration in the range of 1.0 × 10 −4 to 1.0 × 10 −3 mol l −1 with a detection limit of 3.6 × 10 −5 mol l −1 . The modified electrode exhibited excellent reproducibility, accuracy and long-term stability of usage in water samples.

Facile one-step electrodeposition preparation of poly(L-Ornithine) film modified glassy carbon electrodes for sensitive detection of Thiamethoxam

“…In order to improve the performance for the detection of thiamethoxam, chemical modi cation is often employed in electrochemical sensor. A variety of nanomaterials were used for their large speci c surface area, good conductivity and catalytic performance, including metal nanoparticles [9] , carbon nanomaterials [10] , cyclodextrin [11] and calixarene [12] . And the most commonly used modi cation method is direct drop coating for its simple, fast and easy to operate.…”

Facile One-Step Electrodeposition of Poly(L-Ornithine) Film on Glassy Carbon Electrodes for Sensitive Detection of Thiamethoxam

“…9,10 In order to improve the performance for the detection of thiamethoxam, chemical modification is often employed in electrochemical sensor. A variety of nanomaterials were used for their large specific surface area, good conductivity and catalytic performance, including metal nanoparticles, 11,12 carbon nanomaterials, [13][14][15] cyclodextrin 16 and calixarene. 17 And the most commonly used modification method is direct drop coating for its simple, fast and easy to operate.…”