fulltext.study @t Gmail

Multilayer TiO2/SiO2 thin sol–gel films: Effect of calcination temperature and Na+ diffusion

Paper ID Volume ID Publish Year Pages File Format Full-Text
26838 43981 2010 7 PDF Available
Title
Multilayer TiO2/SiO2 thin sol–gel films: Effect of calcination temperature and Na+ diffusion
Abstract

The detrimental effect of Na+ ion diffusion originating from soda-lime glass substrate during calcination on the properties of TiO2 thin sol–gel films can be eliminated by a barrier layer between the glass substrate and the final TiO2 film. This work deals with two layer films consisting of a barrier layer (SiO2 or TiO2) and a final layer (TiO2) deposited on soda-lime glass as a substrate. Particular emphasis was given to the effect of calcination temperature on both barrier and final layer.It was found that photocatalytic properties of titania thin films depend directly on the amount of crystalline anatase which is produced during calcination. It was proved that the SiO2 layer is a much better barrier against Na+ ion diffusion than the TiO2 layer. Furthermore using a SiO2 barrier the final titania layers are active even when calcined at 300 °C. With the application of a SiO2 barrier we can increase the activity of titania layers more than 20 times and moreover 200 °C is sufficient to form a stable and functional SiO2 barrier. It was also shown that when SiO2 barrier is used, no Na+ ion diffusion is possible.

Keywords
Sol–gel; Photocatalysis; Multilayer; Titanium dioxide; Silicon dioxide; Calcination; Temperature; Barrier layer; Na ion; 4-Chlorphenol
First Page Preview
Multilayer TiO2/SiO2 thin sol–gel films: Effect of calcination temperature and Na+ diffusion
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us
Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 216, Issues 2–3, 15 December 2010, Pages 194–200
Authors
, , ,
Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us