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Ni 3 S 2 Supported on Porous Ball‐milled Silicon, a Highly Selective Electrochemical Sensor for Glucose Determination
Author(s) -
Ensafi Ali A.,
Mirzaii Fatemeh,
NasrEsfahani Parisa,
Rezaei Behzad
Publication year - 2020
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.202000069
Subject(s) - materials science , amperometry , porous silicon , scanning electron microscope , electrode , silicon , detection limit , analytical chemistry (journal) , electrochemical gas sensor , calibration curve , electrochemistry , transmission electron microscopy , chemical engineering , nanotechnology , chemistry , chromatography , composite material , metallurgy , engineering
In this work, an electrochemical sensor based on Ni 3 S 2 nanoparticles supported on porous ball‐milled silicon was fabricated for measuring glucose. At first, the glassy carbon electrode (GCE) surface was modified by Ni 3 S 2 nanoparticles supported on a porous ball‐milled silicon substrate. To characterize the modified electrode, N 2 adsorption‐desorption isotherms and BHJ, transmission electron microscopy (TEM), scanning electron microscopy (SEM), energy‐dispersive X‐ray spectroscopy (EDX), elemental mapping and X‐ray diffraction (XRD) were used. In the following, the effective parameters on the sensor response such as pH, NaOH concentration, catalyst concentration, applied potential, and rotational speed of the electrode were optimized using cyclic voltammetric (CV) and hydrodynamic amperometric methods. Under the optimal conditions, the calibration curve was plotted using the hydrodynamic amperometric method. Three linear regions were obtained from 0.5–134, 134–1246, and 1246–3546 μM, with a detection limit of 0.2 μM for glucose. Finally, the proposed method was used for measuring glucose levels in human blood serums.