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URN etd-0710108-152046 Statistics This thesis had been viewed 2852 times. Download 1086 times. Author Hsu-Yuan Chu Author's Email Address No Public. Department Materials Engineering Year 2007 Semester 2 Degree Master Type of Document Master's Thesis Language zh-TW.Big5 Chinese Page Count 83 Title The Effects of Fe3O4 Interlayer and the Addition of Fe(NO3)3．9H2O on the Super-Hydrophilicity of TiO2 Thin Films on the Surface of IF Steel Keyword Fe3O4/TiO2 laminated coating super-hydrophilic IF steel IF steel super-hydrophilic Fe3O4/TiO2 laminated coating Abstract The preparation of super-hydrophilicTiO2 thin film on IF (interstitial free) steel, silicon and titanium substrates through sol-gel technique was investigated in this study. The modified layer of anatase TiO2 cannot be obtained by directly applying TiO2 sol on IF steel surface due to the interference of the thermal diffusion of ferrite atoms. The application of sulfuric acid solution to form a magnetite, Fe3O4, film or the employment of dry Al film serving as an interlayer for blocking the thermal diffusion of substrate atoms was firstly employed. TiO2 precursor sol was then spin-coated on the interlayer. The interference of substrate atoms was retarded during calcination and finally the anatase TiO2 thin film was successfully produced on the surface of IF steel. The goal of this study included: (1) to compare the effect of different systems, Fe/Fe3O4/TiO2 and Fe/Al/TiO2, on the super-hydrophilicity of TiO2 thin films on the surface of IF Steel. (2) to observe the effect of the addition of Fe(NO3)3．9H2O on the super-hydrophilicity of TiO2 thin films on the various systems, Fe/Al/TiO2, Si/Al/TiO2, Si/TiO2 and Ti/TiO2. Surface morphological, structural and compositional variations were analyzed by scanning electron microscopy (SEM), X-ray diffractometry (XRD), Raman scattering spectroscopy, glow discharge optical spectrometry (GDOS) and ultraviolet-visible spectroscopy (UV-Vis). The results were: (1) Fe3O4 thin film in the Fe/Fe3O4/TiO2 system served as an efficient iron diffusion barrier so that Fe3O4/TiO2 laminated film exhibited significant super-hydrophilicity. (2) minor addition of Fe(NO3)3．9H2O into the precursor sol of TiO2 in preparing Fe/Al/TiO2 system was contributive to the blue shift of the absorption edge of the Al/TiO2 laminated film. Advisor Committee Prof. Tair-I Wu - advisor
Files Date of Defense 2008-06-25 Date of Submission 2008-07-15