Photodecomposition effects of graphene oxide coated on TiO₂ thin film prepared by electron-beam evaporation method

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• 作者：Nguyen Tri Khoa^a ; Min Wook Pyun^a ; Dae-Hwang Yoo^a ; Soon Wook Kim^a ; Jae-Young Leem^b ; Eui Jung Kim^c ; Sung Hong Hahn^a ; ^{shhahn@ulsan.ac.kr}
• 关键词：Electron-beam evaporation ; Graphene oxide ; Titanium dioxide ; Thin films ; Photocatalytic activity
• 刊名：Thin Solid Films
• 出版年：2012
• 期刊代码：78_00406090
• 类别：ph
• 出版时间：1 June, 2012
• 卷：520
• 期：16
• 页码：5417-5420
• 文件大小：645 K

摘要

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.