Academy Discounts

Get a 10% discount on all eLearning courses until November 29, 2020. Use code ELEARN10 at checkout.

Photocatalytic Activity of TiO2 and TiO2-xCxNy Thin Films From Polymer Assisted Deposition

Source: AIChE
  • Type:
    Conference Presentation
  • Conference Type:
    AIChE Annual Meeting
  • Presentation Date:
    November 9, 2010
  • Duration:
    30 minutes
  • Skill Level:
  • PDHs:

Share This Post:

Since the 1972 discovery of Fujishima and Honda detecting the occurrence of water splitting on TiO2 electrodes, titanium dioxide's use as a photocatalyst has provoked a broad range of research studies and applications. Applications like air and water-purifying, deodorizing, anti-bacterial use and self-cleaning are now being realized using. Pure TiO2's band gap is large (3.2 eV), causing its photocatalytic property to be active in the ultraviolet region which is <10% of the overall solar intensity. In this presentation, we discuss the synthesis and application of TiO2-based photocatalyst with enhanced visible light response. TiO2 and C-doped TiO2 films were grown on ITO glass by a chemical solution technique, polymer-assisted deposition (PAD) by heating the Ti-polymer precursor films at temperatures of 300 to 550 ºC. Structure analyses by SEM, XRD, as well as UV-Vis spectra are reported. At 500 ºC, the band gap was found to be ~3.05 eV and followed a linear relationship with increasing temperature as more of the polymer was burned off. TiO2 annealed at 350 ºC had remaining polymer in the film, resulting in a lower band gap energy of ~1.95 eV. At temperatures lower than 400 ºC, TiO2-xCx exists with a reduced band gap and should exhibit visible light photocatalytic properties. However, crystallinity of the C-doped TiO2 films is reduced to the point of films being amorphous, and results in the films showing no visible-light activity. This result is unique as it shows that one can reduced the band gap energy, but it does not guarantee enhanced photocatalytic efficiency.

Once the content has been viewed and you have attested to it, you will be able to download and print a certificate for PDH credits. If you have already viewed this content, please click here to login.



Do you already own this?



AIChE Member Credits 0.5
AIChE Members $15.00
AIChE Graduate Student Members Free
AIChE Undergraduate Student Members Free
Non-Members $25.00