NDLI: Development of an Electrochemical Sensor Based on Nanocomposite of $Fe_{3}O_{4}@SiO_{2}$ and Multiwalled Carbon Nanotubes for Determination of Tetracycline in Real Samples

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Development of an Electrochemical Sensor Based on Nanocomposite of $Fe_{3}O_{4}@SiO_{2}$ and Multiwalled Carbon Nanotubes for Determination of Tetracycline in Real Samples

Content Provider	MDPI
Author	Amaral, Edna Silva, Daniela da Silva, Maria Pereira, Arnaldo
Copyright Year	2021
Description	In this work, an electrochemical sensor $(GCE/MWCNT/Fe_{3}O_{4}@SiO_{2}$) based on a composite of multiwalled carbon nanotubes (MWCNT) and an $Fe_{3}O_{4}@SiO_{2}$ (MMN) nanocomposite on a glassy carbon electrode (GCE) was developed for the detection of tetracycline (TC). The composite formed promoted an increased electrochemical signal and the stability of the sensor, combining its individual characteristics such as high electrical conductivity and large surface area. The composite material was characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), Mössbauer spectroscopy, and scanning electron microscope (SEM). The adsorptive stripping differential pulse voltammetry (AdSDPV) promoted better performance for the electrochemical sensor and greater sensitivity for TC detection. Under optimized conditions, the currents increased linearly with TC concentrations from 4.0 to 36 µmol $L^{−1}$ (0.997) and from 40 to 64 µmol $L^{−1}$ (0.994) with detection and quantification limits of 1.67 µmol $L^{−1}$ and 4.0 µmol $L^{−1}$, respectively. The sensor was applied in the analysis of milk and river water samples, obtaining recovery values ranging from 91–117%.
Ending Page	263
Page Count	13
Starting Page	251
e-ISSN	26733293
DOI	10.3390/electrochem2020018
Journal	Electrochem
Issue Number	2
Volume Number	2
Language	English
Publisher	MDPI
Publisher Date	2021-05-18
Access Restriction	Open
Subject Keyword	Electrochem Analytical Chemistry Electrochemical Sensor Multiwalled Carbon Nanotubes Nanocomposite of Fe3o4@sio2 Tetracycline Water Samples Milk Samples
Content Type	Text
Resource Type	Article

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