Electrochemical determination of rutin by using NiFe2O4 nanoparticles-loaded reduced graphene oxide

Abstract

A binary transition metal oxide containing nickel and iron (NiFe 2 O 4 ) and hybridization of this nanomaterial with reduced graphene oxide (rGO) are synthesized by the hydrothermal method. X-ray diffraction (XRD) and Raman spectroscopy confirm the successful synthesis of these materials. Also, scanning electron microscope (SEM) and transmission electron microscope (TEM) images illustrated the particle morphology with the particle size of 20 nm. The synthesized material is then examined as a sensor on the surface of the glassy carbon electrode to detect a very small amount of rutin. Some electrochemical tests such as cyclic voltammetry, differential pulse voltammetry (DPV), and impedance spectroscopy indicate the remarkable accuracy of this sensor and its operation in a relatively wide range of concentrations of rutin (100 nM-100 µM). The accuracy of the proposed electrochemical sensors is approximately 100 nM in 0.1 M PBS, (pH = 3) which is relatively impressive and can be reported. Also, the stability rate after 100 DPV was about 95 %, which is a considerable and relatively excellent value. Considering the very good results, it seems that the NiFe 2 O 4 -rGO can be considered as a new proposal in the development of accurate and inexpensive electrochemical sensors.

Target-Imprinted Polyaniline/Nb2O5 Nanoparticles as Electrochemical Interfaces for Monitoring Kidney Function

“…The slope of the calibration curve, i.e., the logarithm of I pa plotted against the logarithm of v , represents either an adsorption or surface-controlled process (slope = 1.0), or a diffusion-controlled process (slope = 0.5). , Figure S7 shows the calibration curves (log I pa vs log v ) of PAni, Cre-PAni, and PAni/Nb 2 O 5 sensors. With a slope value of 1.0, nonimprinted PAni and PAni/Nb 2 O 5 exhibit surface-controlled redox processes, limited by charge transfer across the interface, while imprinted Cre-PAni exhibits a slope value of 0.94, signifying a limited contribution of diffusion-controlled processes along with predominant surface-controlled reactions simultaneously. , …”

“…With a slope value of 1.0, nonimprinted PAni and PAni/Nb 2 O 5 exhibit surface-controlled redox processes, limited by charge transfer across the interface, while imprinted Cre-PAni exhibits a slope value of 0.94, signifying a limited contribution of diffusion-controlled processes along with predominant surface-controlled reactions simultaneously. 47,48 Figure 4 presents the characteristics of the Cre-PAni/Nb 2 O 5 sensor, which also demonstrates a linear relationship between the I pa and v. The incidence of adsorption or surface-controlled redox phenomenon is obvious by the slope 1.0 of the calibration plot (log I pa and log v), as shown in Figure 4b. 47 To further corroborate this observation, linear regression analysis of I pa vs v is presented in Figure 4c, which shows a coefficient of determination (R 2 = 0.996) corresponding to the surface-controlled mechanism.…”

Development of isoniazid electrochemical sensor using nickel ferrite - nitrogen and sulfur co-doped graphene quantum dot nanocomposite as a new electrode modifier

“…Nickel and iron have always been considered two cheap and environmentally friendly elements in electrochemical applications that form such spinel structures. Nickel ferrite (NiFe 2 O 4 ) with an inverted spinel structure as a binary mixed oxide of transition metals shows promising properties as a potential catalyzer 17 – 19 .…”

S-Doped rGO-Enwrapped Magnetically Porous NiFe2O4/CuS Heterojunction: An Efficient Z-Scheme Nano-Photocatalyst for Visible-Light-Driven Tetracycline Degradation and 4-Nitrophenol Reduction

“…3 However, the outcomes obtained by rGO-NiFe 2 O 4 catalysts fall short of expectations. Additionally, sensors, 20 Li-ion batteries, 6,21,22 supercapacitors, 23 microwave absorption, 24 and antimicrobial activity 25 all utilized rGO-NiFe 2 O 4 photocatalysts. However, the photocatalytic activity of the rGO-NiFe 2 O 4 nanocomposite has rarely been investigated.…”