Hydrothermally synthesized cubical zinc manganite nanostructure for electrocatalytic detection of sulfadiazine

Vinoth, Subramaniyan; Govindasamy, Mani; Wang, Sea‐Fue; Alothman, Asma A.; Alshgari, Razan A.

doi:10.1007/s00604-021-04768-3

Cited by 42 publications

(8 citation statements)

References 37 publications

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“…7 a). According to the results, modifying the electrode with all of the modifiers led to the peak current increment and the peak separation decrease, which indicates an increase in the charge transfer rate and the active surface area of the modified electrodes as reported previously based on electrochemical impedance spectroscopy (EIS) experiments 53 – 56 . Also, based on the results RGO and l -Arg-RGO modified electrodes showed higher current and lower peak separation compared to correspondence species of GQD and l -Arg-GQD which proves better transfer of electrons in RGO-based modifiers.…”

Section: Resultssupporting

confidence: 78%

An optical and electrochemical sensor based on l-arginine functionalized reduced graphene oxide

Ghanbari

Ahour

Keshipour

2022

Sci Rep

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The electrochemical and photochemical properties of graphene derivatives could be significantly improved by modifications in the chemical structure. Herein, reduced graphene oxide (RGO) was functionalized with l-arginine (l-Arg) by an amidation reaction between the support and amino acid. Deposition of a powerful ligand, l-Arg, on the optically active support generated an effective optical chemosensor for the determination of Cd(II), Co(II), Pb(II), and Cu(II). In addition, l-Arg-RGO was used as an electrode modifier to fabricate l-Arg-RGO modified glassy-carbon electrode (l-Arg-RGO/GCE) to be employed in the selective detection of Pb(II) ions by differential pulse anodic stripping voltammetry (DP-ASV). l-Arg-RGO/GCE afforded better results than the bare GCE, RGO/GCE, and l-Arg functionalized graphene quantum dot modified GCE. The nanostructure of RGO, modification by l-Arg, and homogeneous immobilization of resultant nanoparticles at the electrode surface are the reasons for outstanding results. The proposed electrochemical sensor has a wide linear range with a limit of detection equal to 0.06 nM, leading to the easy detection of Pb(II) in the presence of other cations. This research highlighted that RGO as a promising support of optical, and electrochemical sensors could be used in the selective, and sensitive determination of transition metals depends on the nature of the modifier. Moreover, l-Arg as an abundant amino acid deserves to perch on the support for optical, and electrochemical determination of transition metals.

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Section: Resultssupporting

confidence: 78%

An optical and electrochemical sensor based on l-arginine functionalized reduced graphene oxide

Ghanbari

Ahour

Keshipour

2022

Sci Rep

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“…[28][29][30][31] In general, the spinal mixed metal has good electronic conductivity, presence of oxygen sites, and synergistic effect compared to their monometallic compounds such as MnO, NiO, PbO, CuO, MgO, etc. 32,33 Moreover, the spinal nickel cobaltite (NiCo 2 O 4 ) material possesses "A" cations occupying a tetrahedral position and "B" cations are distributed over both the tetrahedral and octahedral position in such crystal structure exhibiting the spinel NiCo 2 O 4 can be expressed in terms of a general formula as Co…”

mentioning

confidence: 99%

Detection of the Neurodegenerative Drug in a Biological Sample Using Three-Dimensional Sphere Mixed Metal Oxide Tailored with Carbon Fiber as an Electrocatalyst by Voltammetry Technique

Vinoth¹,

Wang²

2022

J. Electrochem. Soc.

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The scientific community has shown a great interest in the design and engineering of electrodes as sensing platforms for sensitive and selective drug detection in recent years. A sensor based on three-dimensional spheres like NiCo2O4 tailored on carbon nanofiber CNF as a hybrid composite was prepared by hydrothermal assisted synthesis. This combination was preferred due to its superior electro catalytic activity. Various physical characterizations, such as morphological analysis and spectroscopic tests, were performed on the as-synthesized composite. The electrochemical performance of the modified NCO@CNF electrode was investigated for the detection of clioquinol. The structural property of NCO@CNF promoted a high charge transfer ratio with outstanding conductivity. Upon amperometric analysis, a low detection limit of 8 nM with a very wide linear range of 0.01–301.4 µM and good sensitivity of 0.177 µA µM-1 cm-2 was witnessed for clioquinol detection. Additionally, NCO@CNF modified electrode demonstrated superior anti-interference capability, repeatability, reproducibility, cycle stability (30 cycles) and operational stability (2000 s). The proposed NCO@CNF electrode was tested with diverse biological samples like human blood and urine and shown remarkable recovery.

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“…The peak at 660 cm −1 corresponds to the symmetric breathing mode of the ZnO 4 tetrahedron, the band at 316 cm −1 is the characteristic peak corresponding to the MnO 6 octahedron, and the band at 366 cm −1 is ascribed to the symmetric bending motion of oxygen atoms within the ZnO 4 tetrahedral site. 39,40 The Raman spectra also imply different local structures of spinel manganites induced by Co and Zn incorporation. The cobalt in CoMn 2 O 4 may occupy both tetrahedral and octahedral sites, whereas the zinc in ZnMn 2 O 4 mainly sits in the tetrahedral site, consistent with the EXAFS data that will be discussed later.…”

Section: Microstructure Characterizations Of Spinel-typementioning

confidence: 98%

Unraveling the Critical Role of Octahedrally Coordinated Mn in Spinel Manganites toward Enhanced Electrochemical Charge Storage

Gong,

Zi,

Yang

et al. 2023

ACS Sustainable Chem. Eng.

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Spinel manganite is considered as the most promising pseudocapacitive material due to its typical battery-type electrochemical behavior and high theoretical capacitance; however, understanding its structure−property relationship at the atomic level is still vague. In this study, the substitutional cation-related and geometrical site-dependent charge storage properties in the alkaline electrolyte have been systematically investigated by replacing the Mn with Co and Zn. Structure characterizations and electrochemical analysis clearly revealed the critically important role of octahedrally coordinated Mn in improving the electrode's charge storage capability. The Zn substitution results in dominant occupation of Mn in octahedral interstices and 3.5× enhanced specific capacitance at a current density of 1 A/g, whereas the Co ions occupy both octahedral and tetrahedral interstices with slight increment (18%) of the specific capacitance. However, the bimetallic compositional feature of CoMn 2 O 4 enables better capacitance retention rate and excellent cycling performance; in contrast, the Zn incorporation may lead to a distorted local structure and affect ion diffusion. Therefore, choosing substitutional cations with appropriate size and strong affinity to tetrahedral sites would be beneficial to improve the electrode's electrochemical charge storage properties. In general, our work not only provides a fundamental understanding of the geometrical site-dependent activity in spinel manganites but also summarizes the general principle in optimizing the electrode's charge transfer and ion diffusion processes, which can guide the synthesis of more spinel oxides with improved charge storage capability.

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Hydrothermally synthesized cubical zinc manganite nanostructure for electrocatalytic detection of sulfadiazine

Cited by 42 publications

References 37 publications

An optical and electrochemical sensor based on l-arginine functionalized reduced graphene oxide

An optical and electrochemical sensor based on l-arginine functionalized reduced graphene oxide

Detection of the Neurodegenerative Drug in a Biological Sample Using Three-Dimensional Sphere Mixed Metal Oxide Tailored with Carbon Fiber as an Electrocatalyst by Voltammetry Technique

Unraveling the Critical Role of Octahedrally Coordinated Mn in Spinel Manganites toward Enhanced Electrochemical Charge Storage

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