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Enhanced Superhydrophobic and Photocatalytic Characteristics of Tio2 Hybrid Nanocoating for Self-cleaning Applications

Hajizadeh, Arman | 2018

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 51897 (07)
  4. University: Sharif University of Technology
  5. Department: Materials Science and Engineering
  6. Advisor(s): Mohammadi, Mohammad Reza
  7. Abstract:
  8. Many researches have been made on super hydrophobic and photocatalyst nano coatings in the last decades as a solution to some environmental issues. Among all semiconductors chosen for this property, titanium dioxide is often used because of it's low cost, ease of accessibility and stability in different chemical circumstances to break up organic pollutions. Mixing this property of TiO2 with hydrophobic manner of SiO2 causes a superhydrophobe & photocatalyst nano coating. Doping TiO2 with another semiconductor may also improve photocatalytic behavior of coating by increasing surface area of reaction or decreasing the band-gap.In this research TiO2-SiO2 hybrid nano coating is made via sol-gel process with TEOS , OTES and TTIP precursors , coated on textiles and glass , and a 154o water contact angle was observed on textiles. field emission scanning electron microscopy FESEM images and XRD analysis were done to investigate surface morphology and phases creating the coating. UV-Vis spectrometer analysis was done to show absorbance of the sol in 200 – 800 nm spectra and a 3.26 eV band gap energy for TiO2-SiO2 coating was achieved. for approving photocatalytic activity, degredation of methylene blue as an organic pollution is depicted
  9. Keywords:
  10. Nanocoatings ; Superhydrophobic Surfaces ; Titanium Dioxide ; Photocatalyst ; Self-Cleaning ; Silicon Dioxide

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