Photodecomposition effects of graphene oxide coated on TiO2 thin film prepared by electron-beam evaporation method |
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| Authors: | Nguyen Tri KhoaMin Wook Pyun Dae-Hwang YooSoon Wook Kim Jae-Young LeemEui Jung Kim Sung Hong Hahn |
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| Affiliation: | a Department of Physics and Energy Harvest-storage Research Center, University of Ulsan, Ulsan 680-749, South Koreab School of Nano Engineering, Inje University, Gyongnam 621-749, South Koreac Department of Chemical Engineering, University of Ulsan, Ulsan 680-749, South Korea |
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| Abstract: | Morphological, structural and photocatalytic properties of graphene oxide (GO)/TiO2 thin-film deposited on quartz substrate were investigated. The TiO2 film was prepared by electron-beam evaporation and the GO film by spin coating method. The photocatalytic activities of the GO/TiO2 film were evaluated by photodecomposition of methylene blue. There was synergistic effect between TiO2 and GO which causes a rapid photo-induced charge separation and the reduction of the recombination of electron-hole pairs under the UV-visible light irradiation. GO on TiO2 film also promotes the properties of adsorption of the dye, photon scattering probability, and interacting surface area. As a result, it leads to the enhancement of the efficiency of the photodegradation in GO/TiO2 film. |
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| Keywords: | Electron-beam evaporation Graphene oxide Titanium dioxide Thin films Photocatalytic activity |
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