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http://dx.doi.org/10.12925/jkocs.2017.34.2.349

The Influence of Current Flow on OH Radical Generation in a Photocatalytic Reactor of TiO2 Nanotube Plates  

Kim, Da-Eun (Graduate School of Energy and Environment, Seoul National University of Technology & Science)
Lee, Yong-Ho (Graduate School of Energy and Environment, Seoul National University of Technology & Science)
Kim, Dae-Won (Techross Inc.)
Pak, Dae-Won (Graduate School of Energy and Environment, Seoul National University of Technology & Science)
Publication Information
Journal of the Korean Applied Science and Technology / v.34, no.2, 2017 , pp. 349-356 More about this Journal
Abstract
OH radical generation is one of the common method to evaluate photocatalytic activity. In many of previous studies, only the UV(Ultraviolet) light was applied to test photocatalytic ability of $TiO_2$ nanotubes by studying probe compound(4-Chlorobenzoic acid) concentration change in solution. Also, $TiO_2$ nanotubes were found to show some electrochemical characteristics when the flow of electric current was applied. In this study, the flow of electric current and UV light were applied at the same time to determine whether electrochemical characteristics of $TiO_2$ nanotube plate can give synergetic effect on the photocatalytic activity. $TiO_2$ nanotube was grown on Ti by anodic oxidation to create $TiO_2$ nanotube plate which can be used as a photocatalyst and a electrode that can undergo AOP(Advanced Oxidation Process) for water treatment. Probe compound solution was prepared using 4-chlorobenzoic acid and $H_2O$ as a solvent. NaCl was added to give conductivity to work as electrolyte. As a result, enough level of electric current flow was found to give synergetic photocatalytic effect which can be used for efficient AOP water treatment method.
Keywords
Advanced Oxiation Process (AOP); $TiO_2$ nanotube plate; Anodization; $TiO_2$ Photocatalyst; OH radical; Photocatalysis;
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  • Reference
1 J. Zhang, Y. Nosaka, "Mechanism of the OH radical generation in photocatalysis with $TiO_2$ of different crystalline types", Journal of Physical Chemistry, Vol.118, pp. 10824-10832, (2014).
2 K. Lee, H. Ku, D. Pak, "OH radical generation in a photocatalytic reactor using $TiO_2$ nanotube plates", Chemosphere, Vol.149, pp. 114-120, (2016).   DOI
3 최지현, 미량 잔류 의약물질 제거를 위한 $TiO_2$ 기반 광촉매 산화 기법 연구. p. 31, 高麗大學校 그린스쿨大學院 학위논문, (2013).
4 C. C. Wong, W. Chu, "The direct photolysis and photocatalytic degradation of alachlor at different $TiO_2$ and UV sources", Chemosphere, Vol.50, pp. 981-987, (2003).   DOI
5 T. Intgens, F. Salehi, R. Hochstrat, T. Melin, "Emerging contaminants and treatment options in water recycling for indirect potable use", Water Science of Technology, Vol.57, pp. 99-107, (2008).   DOI
6 N. C. Meng, J. Bo, W. K. Christopher, S. Chris, "Recent developments in photocatalytic water treatment technology: a review", Water Resources, Vol.44, pp. 2997-3027, (2010).
7 J. M. Herrmann, "Heterogeneous photocatalysis: state of the art and present applications in honor of Pr. RL Burwell Jr.(1912-2003), Former Head of Ipatieff Laboratories, Northwestern University, Evanston (Ill)." Topics in Catalysis, Vol.34, No.1 pp. 49-65, (2005).   DOI
8 S. Malato, P. Fernandez-Ibanez, M. I. Maldonado, J. Blanco, W. Gernjak, "Decontamination and disinfection of water by solar photocatalysis: recent overview and trends", Catalyst Today, Vol.147, pp. 1-59, (2009).   DOI
9 R. L. Pozzo, M. A., Baltanas, A. E. Cassano, "Supported titanium dioxide as photocatalyst in water decontamination: state of the art", Catalyst Today, Vol.39, pp. 219-231, (1997).   DOI
10 M. R. Hoffmann, S. T. Martin, W. Choi, D. W. Bahnemann, "Environmental applications of semiconductor photocatalysis", Chemical reviews, Vol.95, No.1 pp. 69-96, (1995).