Photocatalytic Activity of Hierarchically Structured TiO 2 Films Synthesized by Chemical Vapor Deposition
作者： Heon Lee , Sung Hoon Park , Young-Kwon Park , Sun-Jae Kim , Byung-Hoon Kim
DOI: 10.1155/2014/637532
关键词: Morphology (linguistics) 、 Chemical vapor deposition 、 Nanotechnology 、 Photocatalysis 、 Materials science 、 Tio2 photocatalyst 、 Chemical engineering 、 Anatase 、 Deposition (phase transition)
摘要: Hierarchically structured TiO2 photocatalyst films were synthesized using low-pressure metal-organic chemical vapor deposition (LPMOCVD) method to examine their photocatalytic activity. The thickness of the increased proportionally with increasing time. film at 773 K showed a hierarchical structure composed vertically grown laminar (112)-oriented anatase crystals. With time, grain became larger and morphology sharper. In initial CVD stage, small particular crystals formed, above which sequential growth layers columnars size took place, forming structure. hierarchically exhibited much higher activity than unhierarchically film. thickness.
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