By Topic

Comparative study of photocatalytic activity in CdSTiO2 thin films prepared by two different techniques

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $31
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

5 Author(s)
Biswas, S. ; Graduate School of Science and Engineering for Research, University of Toyama, 3190 Gofuku, Toyama 930-8555, Toyama, Japan ; Hossain, M.F. ; Takahashi, T. ; Kubota, Y.
more authors

Your organization might have access to this article on the publisher's site. To check, click on this link:http://dx.doi.org/+10.1116/1.2938392 

In this study, CdS layer in CdSTiO2 bilayer films was fabricated by two different chemical bath deposition techniques: one with an ammonium complex as complexing agent and the other with sodium citrate as a substitute for the ammonium complex. The TiO2 upper layer was deposited by dc magnetron sputtering technique for both the CdS underlayers. The effect of postdeposition vacuum annealing was studied for both samples. The photocatalytic activity was evaluated by measuring the decomposition of methanol in gas phase under ultraviolet-visible irradiation. The CdS thin films, prepared by both techniques, show a highly oriented hexagonal structure. The optical transmission edge of the CdS thin films deposited by the ammonia-free technique is in lower wavelength than that of the other technique. For both techniques, vacuum annealing extends the absorption edge to higher wavelength, but this effect is more pronounced for the ammonia-content technique. The decomposition efficiency of the as-deposited CdSTiO2 thin film prepared by the ammonia-free technique is much higher than the as-deposited CdSTiO2 prepared by ammonia-content technique. In case of the ammonia-content technique, high-vacuum annealing improves the photocatalytic activity but it has minimal influence in the other technique. The surface morphology of all the CdS thin films was studied by field emission scanning electron microscopy and atomic force microscopy in order to find out the possible inherent reason that leads to a huge difference in the photocatalytic decomposition activity of CdSTiO2 thin films.

Published in:

Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films  (Volume:26 ,  Issue: 4 )