Titanium dioxide (TiO2) has a variety of functions, but cannot be activated by visible-light illumination. It is importance to extend the activity of TiO2 into the visible-light, which comprises the larger portion of the room light. Therefore, the visible-light activated TiO2 is required. We developed it with the femtosecond laser irradiation. The TiO2 films irradiated with femtosecond laser were darkened without changing topography of the TiO2 film surface. In the visible-light photocataltic function measurements, the TiO2 films were evaluated with the acetaldehyde decomposition test. The concentration of acetaldehyde was decreased to over time. This result indicated that visible-light activated photocatalyst function of TiO2 films were generated by femtosecond laser irradiation.

Topics
Femtosecond laser irradiation, Transition metal oxides
1.
A.
Fujishima
 &
K.
Honda
 (
1972
),
Electrochemical Photolysis of Water at a Semiconductor Electrode
,
Nature
,
238
[
5358
],
37
–
38
.
https://doi.org/10.1038/238037a0
Google Scholar
Crossref
Search ADS
PubMed
 
2.
S.
Khan
,
M.
Al-Shahry
, &
W.
Ingler
 (
2002
),
Efficient Photochemical Water Splitting by a Chemically Modified N-TiO2
,
Science
,
297
[
5590
],
2243
–
2245
.
https://doi.org/10.1126/science.1075035
Google Scholar
Crossref
Search ADS
PubMed
 
3.
T.
Tatsuma
,
S.
Takeda
,
S.
Saitoh
,
Y.
Ohko
, &
A.
Fujishima
 (
2003
),
Bactericidal Effect of an Energy Storage TiO2–WO3 Photocatalyst in Dark
,
Electrochem. Commun.
,
5
[
9
],
793
–
796
.
https://doi.org/10.1016/j.elecom.2003.07.003
Google Scholar
Crossref
Search ADS
 
4.
W. Y.
Huang
 &
Y.
Yu
 (
2005
),
Progress of Semiconductor Photocatalysts Under Visible Light Irradiation
,
Prog Chem
,
17
[
2
],
242
–
247
.
Google Scholar
 
5.
I.
Nakamura
,
N.
Negishi
,
S.
Kutsuna
,
T.
Ihara
,
S.
Sugihara
 &
K.
Takeuchi
, (
2000
),
Role of oxygen vacancy in the plasma-treated TiO2 photocatalyst with visible light activity for NO removal
,
Journal of Molecular Catalysis A: Chemical
,
161
,
205
–
212
.
https://doi.org/10.1016/S1381-1169(00)00362-9
Google Scholar
Crossref
Search ADS
 
6.
I. N.
Martyanova
,
T.
Bergerb
,
O.
Diwaldb
,
S.
Rodriguesa
 &
K. J.
Klabunde
 (
2010
),
Enhancement of TiO2 visible light photoactivity through accumulation of defects during reduction–oxidation treatment
,
Journal of Photochemistry and Photobiology A: Chemistry
,
212
,
135
–
141
https://doi.org/10.1016/j.jphotochem.2010.04.006
Google Scholar
Crossref
Search ADS
 
7.
M.
Kitano
,
M.
Takeuchi
,
M.
Matsuoka
,
J. M.
Thomas
 &
M.
Anpo
 (
2005
),
Preparation of Visible Light-responsive TiO2 Thin Film Photocatalysts by an RF Magnetron Sputtering Deposition Method and Their Photocatalytic Reactivity
,
Chemistry Letters
, Vol.
34
, No.
4
,
616
–
617
.
https://doi.org/10.1246/cl.2005.616
Google Scholar
Crossref
Search ADS
 
8.
M.
Tsukamoto
,
N.
Abe
,
Y.
Soga
,
M.
Yoshida
,
H.
Nakano
,
M.
Fujita
 &
J.
Akedo
 (
2008
),
Control of electrical resistance of TiO2 films by short-pulse laser irradiation
,
Appl. Phys. A.
,
93
,
193
–
196
.
https://doi.org/10.1007/s00339-008-4713-x
Google Scholar
Crossref
Search ADS
 
9.
J.
Akedo
,
M.
Ichiki
,
K.
Kikuchi
 &
R.
Maeda
 (
1998
),
Jet molding system for realization of three-dimensional micro-structures
,
Sens. Actuators A
,
69
,
106
–
112
.
https://doi.org/10.1016/S0924-4247(98)00059-4
Google Scholar
Crossref
Search ADS
 
10.
M.
Tsukamoto
,
T.
Fujita
,
N.
Abe
,
S.
Miyake
,
M.
Katto
,
T.
Nakayama
 &
J.
Akedo
 (
2003
),
Hydroxyapatite Coating on Titanium Plate with an Ultrafine Particle Beam
,
Jpn. J. Appl. Phys.
,
42
,
L120
–
L122
.
https://doi.org/10.1143/JJAP.42.L120
Google Scholar
Crossref
Search ADS
 
11.
M.
Tsukamoto
,
M.
Mori
,
S.
Baba
,
N.
Abe
 &
J.
Akedo
 (
2005
),
Diode Laser Annealing of PZT Films Produced by Aerosol Deposition Method
,
Trans. Mater. Res. Soc. Jpn.
,
30
(
4
),
1013
–
1016
.
Google Scholar
 
12.
T.
Fujihara
,
M.
Tsukamoto
,
N.
Abe
,
T.
Ohji
 &
J.
Akedo
 (
2005
),
Titania/Hydroxyapatite Composite Multifunction Photocatalyst Film Coating Using a Hybrid Aerosol Beam Irradiation Coating System
,
Trans. Mater. Res. Soc. Jpn.
,
30
(
4
),
1017
–
1020
.
Google Scholar
 
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2012
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