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논문 기본 정보

자료유형
학술저널
저자정보
Kim, Hark Jin (Department of Chemistry, Inha University) Yoo, Seon Mi (Department of Chemistry, Inha University) Yu, Sora (Department of Chemistry, Inha University) Lee, Wan In (Department of Chemistry, Inha University)
저널정보
한국광과학회 Rapid communication in photoscience : RCP Rapid communication in photoscience : RCP 제2권 제1호
발행연도
2013.1
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1 - 8 (8page)

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Transparent $TiO_2$ films in various thicknesses were prepared by sol-gel and MOCVD method, respectively, and their photocatalytic activities in decomposing gaseous 2-propanol were evaluated. The surfaces and grain structures of the prepared films were characterized by FESEM, XRD, and AFM. It was found that the photocatalytic activities of $TiO_2$ films were greatly dependent on the film thickness and surface roughness: The photocatalytic activity increases with the increase of film thickness, while it decreases with the increase of surface roughness. We have proposed that these phenomena originate from the transfer of photogenerated electron and hole pairs from the bulk to the surface of $TiO_2$ film. Several experimental evidences supporting this mechanism have also been provided.

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