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Keyword Author: Voltammetry

3D-printed metal electrodes for electrochemical detection of phenols

3D printed metal electrode modified by means of electroplating methodologies was tested and compared with conventional glassy carbon (GC) electrode for the individual and simultaneous electrochemical detection of phenol and p-aminophenol (p-AP) in aqueous solution via cyclic and differential pulse voltammetry. The 3D printed gold-plated electrode produced two distinct oxidation peaks for phenol and p-AP …

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Simple Synthesis of Fluorinated Graphene: Thermal Exfoliation of Fluorographite

Fluorinated graphene can be prepared directly by thermal exfoliation of fluorographite. The exfoliation was performed in a dynamic nitrogen atmosphere at various temperatures and the exfoliation products were analysed in detail by GC-MS. The structure and properties of all prepared fluorinated graphenes with various contents of fluorine were characterized by a number of analytical techniques. …

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Contrasts between Mild and Harsh Oxidation of Carbon Nanotubes in terms of their Properties and Electrochemical Performance

Fundamental studies and electrochemical applications of carbon nanotubes (CNTs) have impacted a wide range of disciplines. A key issue for CNT electrochemistry is to understand how the physical, chemical, and electronic properties of different CNT materials affect their electrochemical performance. We investigate the differences arising from CNTs undergoing mild (H2O2) or harsh (HNO3) oxidation processes. …

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Self-Propelled Micromotors Monitored by Particle-Electrode Impact Voltammetry

Self-propelled micromotors, as the next frontier of smart miniaturized machines, are able to carry out a plethora of tasks and operations. To date, the evaluation of their capabilities and behavior has been carried out by optical microscopy coupled with computationally intensive imaging software. The use of particle-electrode impact voltammetry serves as an alternative means of …

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Simultaneous Anodic and Cathodic Voltammetric Detection of Patulin and Ochratoxin A on Well-Defined Carbon Electrodes

Detection of mycotoxins is paramount importance for food quality control. Here we compare well-defined surfaces for electrochemical detection of patulin and ochratoxin A on edge plane pyrolytic graphite and glassy carbon electrodes. Patulin shows well-defined peak at similar to – 1.5 V, deeply in cathodic region; ochratoxin A is in contrary oxidizable at potential similar …

Simultaneous Anodic and Cathodic Voltammetric Detection of Patulin and Ochratoxin A on Well-Defined Carbon Electrodes Read More »

Voltammetry of Layered Black Phosphorus: Electrochemistry of Multilayer Phosphorene

Layered black phosphorus crystals were prepared by the chemical vapor transport method. It is characterized by scanning electron microscopy, energy-dispersive X-ray spectroscopy, X-ray photoelectron spectroscopy and X-ray diffraction. Black phosphorus exhibits inherent electrochemistry in the sense that it is oxidizable similar to 560 mV (vs Ag/AgCl). This study is a first step in the utilization …

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Simultaneous Direct Voltammetric Determination of Metal-Oxide Nanoparticles from Their Mixture (CuO/NiO)

Metallic oxide nanoparticles are increasingly being incorporated into consumer products, posing health hazards and damage to the ecology when they are released into the environment. In view of this situation, the development of highly sensitive and facile methods for the detection and quantification of harmful metallic oxide nanoparticles present in a sample is necessary. In …

Simultaneous Direct Voltammetric Determination of Metal-Oxide Nanoparticles from Their Mixture (CuO/NiO) Read More »

Direct electrochemistry of copper oxide nanoparticles in alkaline media

The use of metallic nanoparticles in consumer products is growing, posing health threatening issues as they are being released into the environment As such, there is an urgent need for a facile method to be used for the detection and quantification of metallic nanoparticles present in a sample. In this work, the electrochemical behavior of …

Direct electrochemistry of copper oxide nanoparticles in alkaline media Read More »

Regulatory peptides desmopressin and glutathione voltammetric determination on nickel oxide modified electrodes

The determination of important regulatory peptides containing disulphidic bridge and thiols are of much interest. We investigated, via differential pulse voltammetry, the use of glassy carbon electrodes modified with nickel(II) oxide nanoparticles for electrocatalytic oxidation of L-glutathione and desmopressin. Linear response in the range of 0.2 to 6.0 mM of L-glutathione was observed, which brackets …

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Electron hopping rate measurements in ITO junctions: Charge diffusion in a layer-by-layer deposited ruthenium(II)-bis(benzimidazolyl)pyridine-phosphonate-TiO2 film

Focused ion beam (FIB) machining allowed a sub-micron trench to be cut through tin-doped indium oxide (ITO) film on glass to give a generator – collector junction electrode with narrow gap (ca. 600 nm). A layer-by-layer deposited film composed of a dinuclear ruthenium(II)-bis(benzimidazolyl)pyridine-phosphonate (as the negative component) and nanoparticulate TiO2 (ca. 6 nm diameter, as …

Electron hopping rate measurements in ITO junctions: Charge diffusion in a layer-by-layer deposited ruthenium(II)-bis(benzimidazolyl)pyridine-phosphonate-TiO2 film Read More »

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