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http://dx.doi.org/10.3740/MRSK.2017.27.3.137

Influence of Manufacturing Conditions for the Life Time of the Boron-Doped Diamond Electrode in Wastewater Treatment  

Choi, Yong-Sun (Department of Information & Electronics Engineering, Uiduk University)
Lee, Young-Ki (Division of Green Energy Engineering, Uiduk University)
Kim, Jung-Yuel (Division of Green Energy Engineering, Uiduk University)
Kim, Kyeong-Min (Department of Information & Electronics Engineering, Uiduk University)
Lee, You-Kee (Division of Green Energy Engineering, Uiduk University)
Publication Information
Korean Journal of Materials Research / v.27, no.3, 2017 , pp. 137-143 More about this Journal
Abstract
Boron-doped diamond (BDD) electrode has an extremely wide potential window in aqueous and non-aqueous electrolytes, very low and stable background current and high resistance to surface fouling due to weak adsorption. These features endow the BDD electrode with potentially wide electrochemical applications, in such areas as wastewater treatment, electrosynthesis and electrochemical sensors. In this study, the characteristics of the BDD electrode were examined by scanning electron microscopy (SEM) and evaluated by accelerated life test. The effects of manufacturing conditions on the BDD electrode were determined and remedies for negative effects were noted in order to improve the electrode lifetime in wastewater treatment. The lifetime of the BDD electrode was influenced by manufacturing conditions, such as surface roughness, seeding method and rate of introduction of gases into the reaction chamber. The results of this study showed that BDD electrodes manufactured using sanding media of different sizes resulted in the most effective electrode lifetime when the particle size of alumina used was from $75{\sim}106{\mu}m$ (#150). Ultrasonic treatment was found to be more effective than polishing treatment in the test of seeding processes. In addition to this, BDD electrodes manufactured by introducing gases at different rates resulted in the most effective electrode lifetime when the introduced gas had a composition of hydrogen gas 94.5 vol.% carbon source gas 1.6 vol.% and boron source gas 3.9 vol.%.
Keywords
boron-doped diamond; wastewater treatment; life time; surface roughness; seeding method; rate of gases;
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