A miniaturized injection-moulded flow-cell with integrated conducting polymer electrodes for on-line electrochemical degradation of azo dye solutions
| Autor: | Nicholas J. Goddard, Peter R. Fielden, Zainab Mohammed Redha, Hayat Abdulla Yusuf, Hussain Ali Ahmed, Sara J. Baldock |
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| Rok vydání: | 2017 |
| Předmět: |
Conductive polymer
chemistry.chemical_classification Materials science Nanotechnology 02 engineering and technology Polymer 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Electrochemistry 01 natural sciences Reference electrode Atomic and Molecular Physics and Optics 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials chemistry Chemical engineering Electrode Degradation (geology) Surface modification Injection moulding Electrical and Electronic Engineering 0210 nano-technology |
| Zdroj: | Microelectronic Engineering. 169:16-23 |
| ISSN: | 0167-9317 |
| DOI: | 10.1016/j.mee.2016.11.016 |
| Popis: | This study investigates the effectiveness of a novel micro electrochemical flow-cell containing carbon fiber electrodes for the degradation of Azo dye solutions. The flow-cell was fabricated by an injection moulding technique, integrating three electrodes system design using an overmoulding procedure. All electrodes were fabricated from carbon fiber polymer, however, the reference electrode was then coated with Ag/AgCl paste. The effect of the process variables such as flow-rate, NaCl concentration, applied bias current, and solution pH on the degradation process were comprehensively studied. At optimum conditions, complete degradation of the dye was achieved on the bare carbon fiber electrode, without the need for surface modification, in 150min upon the application of 15mA bias current. The degradation process was suggested to follow the indirect oxidation mechanism where the presence of chlorine ions was very essential. Moreover, the micro-flow-cell had proven its stability over the entire operation time, which indicates its practicality for such on-line applications. Display Omitted A novel miniaturized flowcell for the degradation of dye containing effluent was fabricated.The electrodes are low cost, mass produced, and efficient for the degradation of dyes.The degradation involves indirect electrochemical oxidation of the dyeComplete decolorisation achieved in 150min in a continuous process.Better degradation efficiency is achieved at lower flowrates |
| Databáze: | OpenAIRE |
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