Photo-electrochemical and photocatalytic properties of chemically-treated and thermally-annealed titanium dioxide films

Photo-electrochemical and photocatalytic properties of chemically-treated and thermally-annealed... Chemical treatment followed by thermal annealing of titanium dioxide nanoparticle film surfaces with urea or ammonium acetate were found to exert a profound influence on their photoelectrochemical or photocatalytic activity. These films were dip-coated over conducting substrates, then dipped in urea or ammonium acetate aqueo us solutions, and finally baked at 300 or 500°C to yield two sets of chemically-treated TiO2 (CT-TiO2) films. The incident photon to electron conversion efficiency (IPCE) of the CT-TiO2 films in the near-UV region was significantly higher compared to the pristine (untreated) TiO2 samples baked similarly at 300 or 500°C. Higher photocurrents for formate photo-oxidation were also observed for the CT-TiO2 samples relative to their untreated TiO2 counterparts. All the CT-TiO2 films showed better photocatalytic activity toward Cr(VI) reduction with respect to their untreated TiO2 counterparts. The enhanced performance of the CT-TiO2 films was attributed to morphological changes as seen in scanning electron microscopy images. Possible reasons for the performance improvement in terms of better charge carrier separation properties of the CT-TiO2 films are finally discussed. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Research on Chemical Intermediates Springer Journals

Photo-electrochemical and photocatalytic properties of chemically-treated and thermally-annealed titanium dioxide films

Loading next page...
 
/lp/springer_journal/photo-electrochemical-and-photocatalytic-properties-of-chemically-zRCUlcw9tG
Publisher
Springer Netherlands
Copyright
Copyright © 2007 by Springer
Subject
Chemistry; Catalysis; Physical Chemistry; Inorganic Chemistry
ISSN
0922-6168
eISSN
1568-5675
D.O.I.
10.1163/156856707779238757
Publisher site
See Article on Publisher Site

Abstract

Chemical treatment followed by thermal annealing of titanium dioxide nanoparticle film surfaces with urea or ammonium acetate were found to exert a profound influence on their photoelectrochemical or photocatalytic activity. These films were dip-coated over conducting substrates, then dipped in urea or ammonium acetate aqueo us solutions, and finally baked at 300 or 500°C to yield two sets of chemically-treated TiO2 (CT-TiO2) films. The incident photon to electron conversion efficiency (IPCE) of the CT-TiO2 films in the near-UV region was significantly higher compared to the pristine (untreated) TiO2 samples baked similarly at 300 or 500°C. Higher photocurrents for formate photo-oxidation were also observed for the CT-TiO2 samples relative to their untreated TiO2 counterparts. All the CT-TiO2 films showed better photocatalytic activity toward Cr(VI) reduction with respect to their untreated TiO2 counterparts. The enhanced performance of the CT-TiO2 films was attributed to morphological changes as seen in scanning electron microscopy images. Possible reasons for the performance improvement in terms of better charge carrier separation properties of the CT-TiO2 films are finally discussed.

Journal

Research on Chemical IntermediatesSpringer Journals

Published: Apr 15, 2009

References

You’re reading a free preview. Subscribe to read the entire article.


DeepDyve is your
personal research library

It’s your single place to instantly
discover and read the research
that matters to you.

Enjoy affordable access to
over 12 million articles from more than
10,000 peer-reviewed journals.

All for just $49/month

Explore the DeepDyve Library

Unlimited reading

Read as many articles as you need. Full articles with original layout, charts and figures. Read online, from anywhere.

Stay up to date

Keep up with your field with Personalized Recommendations and Follow Journals to get automatic updates.

Organize your research

It’s easy to organize your research with our built-in tools.

Your journals are on DeepDyve

Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.

All the latest content is available, no embargo periods.

See the journals in your area

DeepDyve Freelancer

DeepDyve Pro

Price
FREE
$49/month

$360/year
Save searches from
Google Scholar,
PubMed
Create lists to
organize your research
Export lists, citations
Read DeepDyve articles
Abstract access only
Unlimited access to over
18 million full-text articles
Print
20 pages/month
PDF Discount
20% off