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High-Performance Ceramic-Carbon Composite Electrodes for Sustainable Wastewater Remediation: A Comparative Study of Catalytically-active Nanoparticle Loading
Abstract
This study presents the development and analysis of novel three-dimensional ceramic-carbon composite electrodes enhanced with titanium dioxide (TiO2) nanoparticles or potassium trivanadate (KV3O8) microcrystals for electrochemical and photoelectrochemical wastewater treatment applications. These composites feature high carbon content, ensuring excellent electrical conductivity, making them suitable as cost-effective, non-toxic anodes for wastewater electrolysis. Incorporating TiO2 and KV3O8 within three-dimensional carbon-ceramic electrodes (3DCE) enhanced its surface area and adsorption capability while reducing overall energy requirements compared to unmodified composites. The research investigated caffeine electrolysis through direct oxidation, examining decomposition mechanisms and analyzing structural changes in the loaded electrodes, including physicochemical and topographic alterations during high-current corrosion. TiO2-loaded electrodes demonstrated superior caffeine removal efficiency across all electrolysis cycles, though the process showed diffusion-controlled characteristics at higher currents. Automated image analysis provided consistent quantification of corrosion-induced surface defects. Tafel extrapolation revealed that both TiO2 and KV3O8 modifications reduced corrosion kinetics compared to unmodified composites while enhancing cathodic reactions and charge transfer during electrolysis. However, upon solar irradiation, the composite corrosion rate may be increased due to KV3O8 photocatalytic properties. The principal component analysis identified distinct behavioural patterns: samples treated at 200 mA clustered closely, indicating consistent electrochemical behaviour regardless of the additive, while 100 mA treatments showed higher variability. The results suggest that polarisation current is the primary factor influencing composite anode behaviour, with higher currents (200 mA) providing more consistent and superior removal rates. The study demonstrates that these modified ceramic-carbon composite electrodes exhibit advanced electrolysis performance, making them promising candidates for sustainable water remediation applications.
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Authors (9)
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Aleksandra Pieczyńska
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Details
- Category:
- Articles
- Type:
- artykuły w czasopismach
- Published in:
-
ELECTROCHIMICA ACTA
no. 530,
ISSN: 0013-4686 - Language:
- English
- Publication year:
- 2025
- Bibliographic description:
- Kaczmarzyk I., Jeleniewska Z., Onyshchenko O., Ślepski P., Pieczyńska A., Kozłowska-Tylingo K., Bogdanowicz R., Ryl J., Prześniak-Welenc M.: High-Performance Ceramic-Carbon Composite Electrodes for Sustainable Wastewater Remediation: A Comparative Study of Catalytically-active Nanoparticle Loading// ELECTROCHIMICA ACTA -Vol. 530, (2025), s.146404-
- DOI:
- Digital Object Identifier (open in new tab) 10.1016/j.electacta.2025.146404
- Sources of funding:
- Verified by:
- Gdańsk University of Technology
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