ArticleScientific reports2026
Pecan nut-derived carbon quantum dots-modified electrode for sensitive electrochemical determination of vonoprazan using a green analytical approach.
Article in Scientific reports, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
A novel, environmentally considerate electroanalytical sensor was developed for the determination of vonoprazan fumarate (VON) through modification of a carbon paste electrode with biomass-derived carbon quantum dots (CQDs), representing a sustainable, defect-rich, and effective alternative to conventional CQD-based sensors that rely on synthetic materials and complex fabrication. The CQDs were synthesized from pecan nut (Carya illinoinensis) using a microwave-assisted solvothermal approach and exhibited abundant functional groups and quantum confinement effects, as confirmed via X-ray photoelectron spectroscopy (XPS) in combination with Fourier-transform infrared (FTIR) spectroscopy, fluorescence spectroscopy, ultraviolet-visible spectroscopic approach (UV-Vis), transmission electron microscopy (TEM) and scanning electron microscopy combined with energy-dispersive X-ray spectroscopy (SEM-EDX). Electrochemical impedance spectroscopy (EIS) revealed enhanced interfacial electron-transfer kinetics and electrocatalytic activity, highlighting the enhanced electrode performance of the CQD-modified sensor and its direct contribution to improved sensitivity and selectivity. Quantitative determination of VON was performed using differential pulse voltammetry (DPV), achieving a limit of detection of 0.39 nM, a limit of quantification of 1.19 nM, and a linear response over 10-100 nM (R
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