Hierarchical 3D Snowflake-like Iron Diselenide: A Robust Electrocatalyst for Furaltadone Detection

Abstract

An electrocatalyst with a large active site is critical for the development of a high-performance electrochemical sensor. This work demonstrates the fabrication of an iron diselenide (FeSe2)-modified screen-printed carbon electrode (SPCE) for the electrochemical determination of furaltadone (FLD). It has been prepared by the facile method and systematically characterized with various microscopic/spectroscopic approaches. Due to advantageous physiochemical properties, the FeSe2/SPCE showed a low charge-transfer resistance value of 200 Ω in 5.0 mM [Fe­(CN)6]3–/4– containing 0.1 M KCl. More importantly, the FeSe2/SPCE exhibited superior catalytic performance compared to the bare SPCE for FLD sensing based on the electrochemical response in terms of a peak potential of −0.44 V (vs Ag/AgCl (sat. KCl)) and cathodic response current of −22.8 μA. Operating at optimal conditions, the FeSe2-modified electrode showed wide linearity from 0.01 to 252.2 μM with a limit of detection of 0.002 μM and sensitivity of 1.15 μA μM–1 cm–2. The analytical performance of the FeSe2-based platform is significantly higher than many previously reported FLD electrochemical sensors. Furthermore, the FeSe2/SPCE also has a promising platform for FLD detection with high sensitivity, good selectivity, excellent stability, and robust reproducibility. Thus, the finding above shows that the FeSe2/SPCE is a highly suitable candidate for the electrochemical determination of glucose levels for real-time applications such as in human urine and river water samples.

Deep Eutectic Solvent-Assisted Synthesis of a Strontium Tungstate Bifunctional Catalyst: Investigation on the Electrocatalytic Determination and Photocatalytic Degradation of Acetaminophen and Metformin Drugs

“…Life in the modern era is inextricably associated with the rapid development of globalization that leads society toward the massive use of emergent pollutants. , As one of several emerging pollutants, it has become progressively more ostensive that pharmaceutical compounds found in water severely negatively impact the environment . Among many other uses, many of these drug compounds are widely served as antiepileptics, analgesics, disinfectants, anti-inflammatories, lipid regulators, antiseptics, and antibiotics. , Pharmaceutical pollutants bioaccumulate, contain the phenolic group at the conspicuous site, and are recalcitrant.…”

Novel Iron Oxide Nanoparticle-Fortified Carbon Paste Electrode for the Sensitive Voltammetric Determination of Atomoxetine

“…With the aim of improved performance and sensitivity, studies were carried out through the integration of the matrix of a voltammetric sensor with different metal oxide nanoparticles. − Nanostructure-based sensors introduced different opportunities and improved the prospects of the analytical approach with enhanced sensitivity and selectivity. Based on the electrocatalytic activity of the electrode modifier, a noticeable shift in the redox potential and acceleration of the electron-transfer kinetics were reported.…”