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http://dx.doi.org/10.12925/jkocs.2022.39.1.34

UV Light-assisted Photocatalytic Degradation of Simluated Methylene blue Dye by Multilayered ZnO Films  

Khan, Shenawar Ali (Department of Electronic Engineering, Jeju National University)
Zafar, Muhammad (Institute of Energy and Environment Engineering, University of the Punjab)
Kim, Woo Young (Department of Electronic Engineering, Jeju National University)
Publication Information
Journal of the Korean Applied Science and Technology / v.39, no.1, 2022 , pp. 34-41 More about this Journal
Abstract
As the use of chemical products increases in daily life, the removal of dye waste has also emerged as an important environmental issue. This dye waste can be decomposed using a photocatalyst, and the photocatalyst can be synthesized very cost-effectively by using the sol-gel technology. The sol-gel technology is not only very useful for nanoscale film formation, but also can simply form multilayer structures. Using a multiple spin coating method, in this study, a ZnO film with a multilayered structure (3 layers, 5 layers) was formed by using zinc oxide (ZnO), which is effective in decomposing various dyes. For performance comparison, a ZnO film having a single layer structure by a single spin coating method was prepared as a control. Structural and elemental analysis of ZnO film was performed using an X-ray diffraction analyzer and an energy dispersive X-ray spectrometer. A nanowire-like surface morphology could be observed through a scanning electron microscope. Additionally, UV-Vis spectrophotometer was used to measure the absorbance of UV light. The ZnO film with a five-layer structure degraded the simulated methylene blue by 49% more than the ZnO film with a single-layer structure. In conclusion, it was found that ZnO having a multilayered structure is useful as a photocatalyst that decomposes methylene blue dye more effectively.
Keywords
photocatalysis; UV absorption; multilayered ZnO; degradation; methylene blue;
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