Characterization of Bismuth Composited to Carbon Nanotube-Coated Titanium Cathode in Electro-Fenton System

Bismuth (Bi) is a highly reactive catalyst for the generation of hydroxyl (∙OH) radicals. Cathodes constructed from composites of Bi and carbon nanotube (CNT) exhibit high stability and low resistance, which enhance their electron transfer capability. In this work, a titanium substrate was coated wi...

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Bibliographic Details
Published inNanomaterials and nanotechnology Vol. 2023; pp. 1 - 11
Main Authors Wang, Yi-Ta, Hsieh, Yi-Chi, Lin, Yue-Sheng
Format Journal Article
LanguageEnglish
Published London Hindawi 14.08.2023
John Wiley & Sons, Inc
Hindawi Limited
Wiley
Subjects
Bismuth
Carbon
Cathode rays
Cathodes
Design and construction
Electrodeposition
Electrodes
Electron transfer
Electron transport
Electrons
Electrophoretic deposition
Fuel cells
Graphene
Low resistance
Materials
Multi wall carbon nanotubes
Nanoparticles
Nanotubes
Nitrates
Oxidation
Pollutants
Rhodamine
Substrates
Titanium
Titanium alloys
Taiwan
Japan
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Summary:Bismuth (Bi) is a highly reactive catalyst for the generation of hydroxyl (∙OH) radicals. Cathodes constructed from composites of Bi and carbon nanotube (CNT) exhibit high stability and low resistance, which enhance their electron transfer capability. In this work, a titanium substrate was coated with multi-walled carbon nanotube (MWCNT/Ti) using electrophoretic deposition process, followed by electrodeposition of Bi onto the MWCNT-coated Ti (Bi/MWCNT/Ti). The effects of Bi electrodeposition time on the surface morphology of Bi/MWCNT/Ti cathodes were investigated by scanning electron microscopy and energy-dispersive X-ray spectroscopy, and the electrochemical characteristics of each cathode were identified via a series of electrochemical analyses further. The results demonstrated that electrodeposition at −0.85 V vs. Ag/AgCl for 5 min revealed uniform distribution of dense Bi across the surface of cathode, which provides better hydrophilicity for cathode and promotes highest electron transfer rates, respectively; when the Bi/MWCNT/Ti cathode was used as an electro-Fenton (EF) cathode, the EF system achieved a rhodamine B degradation rate of 80.8% after 30 min, which is a significant increase (83.63%) than the unmodified Ti cathode. The use of Bi in EF cathodes improves the efficiency of the EF process.
ISSN:1847-9804
1847-9804
DOI:10.1155/2023/9753824