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http://dx.doi.org/10.14579/MEMBRANE_JOURNAL.2019.29.6.299

Visible Light-based Photocatalytic Degradation by Transition Metal Oxide  

Lee, Soomin (Nano Science and Engineering, Integrated Science and Engineering Division, Underwood International College, Yonsei University)
Park, Yeji (Nano Science and Engineering, Integrated Science and Engineering Division, Underwood International College, Yonsei University)
Lee, Jae Hun (Department of Chemical and Biomolecular Engineering, Yonsei University)
Patel, Rajkumar (Energy Environmental Science and Engineering, Integrated Science and Engineering Division, Underwood International College, Yonsei University)
Publication Information
Membrane Journal / v.29, no.6, 2019 , pp. 299-307 More about this Journal
Abstract
Photocatalysis is an environment friendly technique for degrading organic dyes in water. Tungsten oxide is becoming an active area of research in photocatalysis nanomaterials for having a smaller bandgap than the previously favored titanium dioxide. Synthesis of hierarchical structures, doping platinum (Pt), coupling with nanocomposites or other semiconductors are investigated as valid methods of improving the photocatalytic degradation efficiency. These impact the reaction by creating a redshift in the wavelength of light used, effecting charge transfer, and the formation/recombination of electron-hole pairs. Each of the methods mentioned above are investigated in terms of synthesis and photocatalytic efficiency, with the simplest being modification on the morphology of tungsten oxide, since it does not need synthesis of other materials, and the most efficient in photocatalytic degradation being complex coupling of metal oxides and carbon composites. The photocatalysis technology can be incorporated with water purification membrane by modularization process and applied to advanced water treatment system.
Keywords
photocatalysis; $WO_3$; organic dye; degradation;
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