Journal
APPLIED CATALYSIS A-GENERAL
Volume 348, Issue 1, Pages 148-152Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apcata.2008.06.040
Keywords
photocatalyst; titanium(IV) oxide; visible-light response photocatalyst; transition-metal ion; switching redox sites
Categories
Funding
- Ministry of Education, Culture, Sports, Science and Technology (MEXT)
- New Energy and Industrial Technology Development Organization (NEDO)
Ask authors/readers for more resources
Titanium(IV) oxide (TiO2) particles were modified with several kinds of transition-metal ions (iron(III), copper(II), nickel(II) and chromium(III) ions). Photocatalytic activity for acetaldehyde decomposition over metal-ion-modified TiO2 showed higher photocatalytic activity than bare TiO2 under ultraviolet (UV) as well as visible-light irradiation. The mechanism of photocatalytic reaction over metal-ion-modified TiO2 was investigated by double-beam photoacoustic (DB-PA) spectroscopy, which enables observation of electron migration in the TiO2 particles. DB-PA measurements suggested that metal ions on TiO2 surface acted differently depending on the wavelength of photoirradiation, i.e., as electron acceptors under UV irradiation and as electron injectors under visible-light irradiation. (C) 2008 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available