Final published version
Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - A miniaturized injection-moulded flow-cell with integrated conducting polymer electrodes for on-line electrochemical degradation of azo dye solutions
AU - Mohammed Redha, Zainab
AU - Abdulla Yusuf, Hayat
AU - Ahmed, Hussain Ali
AU - Fielden, Peter R.
AU - Goddard, Nick J.
AU - Baldock, Sara J.
PY - 2017/2/5
Y1 - 2017/2/5
N2 - Abstract 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 150 min upon the application of 15 mA 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.
AB - Abstract 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 150 min upon the application of 15 mA 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.
KW - Miniaturization
KW - Micro electrode
KW - Injection moulding
KW - Flow-cell
KW - Methyl orange
KW - Azo dyes
KW - Electrochemical degradation
KW - Carbon fiber
U2 - 10.1016/j.mee.2016.11.016
DO - 10.1016/j.mee.2016.11.016
M3 - Journal article
VL - 169
SP - 16
EP - 23
JO - Microelectronic Engineering
JF - Microelectronic Engineering
SN - 0167-9317
ER -