The DOI matches its Crossref record.
Carbon Nanotube Purification: Preparation and Characterization of Carbon Nanotube Paste Electrodes
Abstract
Paste electrodes have been constructed using single-wall carbon nanotubes mixed with mineral oil. The electrochemical behavior of such electrodes prepared with different percentages of carbon nanotubes has been compared with that of graphite paste electrodes and evaluated with respect to the electrochemistry of ferricyanide with cyclic voltammetry. Carbon nanotubes were purified by a treatment with concentrated nitric acid, then oxidized in air. In addition, electrochemical pretreatments were carried out to increase the selectivity of carbon nanotube electrodes. Performances of carbon nanotube paste and carbon paste electrodes were evaluated by studying such parameters as current peak, deltaEp, anodic and cathodic current ratio, and charge density toward several different electroactive molecules. Data interpretation based on the carbon nanotubes and carbon surface area is presented. Carbon nanotube paste and carbon paste electrodes were tested as H2O2 and NADH probes, and several analytical parameters were evaluated. The oxidative behavior of dopamine was examined at these electrodes. The two-electron oxidation of dopamine to dopaminequinone showed an excellent reversibility in cyclic voltammetry that was significantly better than that observed at carbon paste electrodes.
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Metadata
- Authors
- Valentini, F., Amine, A., Orlanducci, S., Terranova, M. L., & Palleschi, G.
- Venue
- Analytical Chemistry
- Publisher
- American Chemical Society (ACS)
- Published
- 2003-09-09
- Volume
- 75
- Issue
- 20
- Pages
- 5413-5421
- ISSN
- 0003-2700 (ISSN-L)
- 1520-6882
- OpenAlex
- W2066676411
- Cited by
- 540
- References
- 0
- FWCI
- 26.48
- Type
- journal article
- Language
- en
- Open access
- closed
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