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Microwave-assisted Photocatalytic Degradation of Methylene Blue  

Kim, Yu-Bong (Department of Environmental Engineering, Sunchon National University)
Jo, A-Ra (Department of Environmental Engineering, Sunchon National University)
Ra, Deog-Gwan (Department of Environmental Engineering, Sunchon National University)
Park, Jae-Hyeon (Clean Energy System Research Center, Korea Institute of Energy Research)
Kim, Sun-Jae (Department of Nano Science and Technology, Sejong University)
Jung, Sang-Chul (Department of Environmental Engineering, Sunchon National University)
Publication Information
Journal of Korean Society of Environmental Engineers / v.30, no.8, 2008 , pp. 817-822 More about this Journal
Abstract
In this study, the photocatalytic degradation of methylene blue in TiO$_2$ particles-dispersed water solution was carried out by irradiating microwave and UV light simultaneously. A microwave-discharged electrodeless UV lamp was developed to use microwave and UV simultaneously for photocatalytic reactions. The results of photocatalytic degradation of methylene blue showed that the decomposition rate increased with the microwave intensity, the circulating fluid velocity, and the amount of TiO$_2$ particles and auxiliary oxidizing agents added. Especially, the rate constant of H$_2$O$_2$-added photocatalytic reaction increased about three times from 0.0075 min$^{-1}$ to 0.0250 min$^{-1}$ when microwave was additionally irradiated. This study demonstrates that the microwave irradiation can play a very important role in photocatalytic degradation using peroxides although it is not easy to quantitatively assess the effect of microwave on photocatalytic reactions from the experimental data of this study.
Keywords
TiO$_2$; Photocatalyst; Microwave; UV; Methylene Blue;
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