Title page for etd-0905107-175230


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URN etd-0905107-175230
Author Yi-chen Wu
Author's Email Address No Public.
Statistics This thesis had been viewed 5346 times. Download 5531 times.
Department Environmental Engineering
Year 2006
Semester 2
Degree Master
Type of Document
Language zh-TW.Big5 Chinese
Title Application of Sputtering Technology on Preparing Visible-light Nano-sized Photocatalysts for the Decomposition of Acetone
Date of Defense 2007-06-22
Page Count 114
Keyword
  • sputtering technology
  • acetone decomposition
  • photocatalytic oxidation
  • photosensitive
  • acetone
  • modified photocatalysts
  • Abstract This study investigated the decomposition efficiency of acetone using unmodified (pure TiO2) and modified TiO2 (TiO2/ITO、TiO2/N) prepared by sputtering technology. The influence of operating parameters including wavelength and relative humidity on the decomposition efficiency of acetone was further discussed. Operating parameters investigated included light wavelength (350~400, 435~500, and 506~600 nm), photocatalysts (TiO2/ITO, TiO2/N, and TiO2), and relative humidity (RH) (0%, 50%, and 100%).
      In the experiments, acetone was degraded by photocatalysts in a self-designed batch photocatalytical reactor. Samples coated with TiO2 were placed in the batch reactor. The incident light with different wavelength was irradiated by a 20-watt lamp. Moreover, a low-pressure mercury lamp for UV light or LED lamps for blue and green lights were placed on the top of reactor. Acetone was injected into reactor by using a gasket syringe. Reactants and products were analyzed quantitatively by a gas chromatography with a flame ionization detector followed by a methaneizer (GC/FID-Methaneizer).
    The structure of the photocatalyst film surface showed taper and the width of column ranged from 100 to 200 nm. The film structure showed crystallization cylindrical surface and the thickness of the photocatalyst film was in the range of 4.0-4.3 μm. The highest decomposition efficiency of acetone was observed by using TiO2/ITO under visible-light with 50% RH. The synthesis of TiO2 was mainly anatase for the tested photocatalysts. AFM images showed that the photocatalyst surface appeared rugged and the shape showed a mountain ridge distribution .
    Keywords: sputtering technology, modified photocatalysts, photosensitive, acetone, photocatalytic oxidation, acetone decomposition
    Advisory Committee
  • Yung-Hsu Hsieh - chair
  • Kee-Rong Wu - co-chair
  • Chung-Hsuang Hung - co-chair
  • Chung-Shin Yuan - advisor
  • Files
  • etd-0905107-175230.pdf
  • indicate access worldwide
    Date of Submission 2007-09-05

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