Rapid Synthesis of Porous, Mixed Phase Titania Films with Tailored Orientation of Rutile for Enhanced Photocatalytic Performance
Journal article, 2013
We report on a new, one-step electrochemical oxidation method for the rapid synthesis of mixed phase, polycrystalline TiO2 porous films with oriented rutile within a few minutes. The orientation as well as the surface chemical composition of rutile nanocrystallites can readily be tuned by adjusting the additive concentrations of HCl or HF in the electrolyte during synthesis. All TiO2 films show similar large specific surface area, which is ideal for the application of photocatalysis and photoelectrocatalysis. Compared to the random-oriented TiO2 film, films with an increasing portion of exposed rutile (101) facets were found to be characterized by enhanced photocatalytic oxidation and photoelectrochemical performances. We also observed a synergistic promotion effect of the orientation and surface F impurity. Most interesting, our tailor-oriented porous TiO2 films prepared using HF as additive show an impressive photocurrent generation at zero bias, which is similar to 50 times higher compared to that of the random-oriented TiO2 film.
CHEMICAL PHYSICS LETTERS
NANOPARTICLES
V98
GROWTH
P55
V192
1993
1994
GRENOBLE
HYDROTHERMAL CONDITIONS
OI WY
FRANCE
FACETS
NANORODS
POWDER
UDY OF MAGNETISM
V205
PHOTOREACTIVITY
SURFACE
P55
TIO2 SINGLE-CRYSTALS
AFFORD U
ANATASE TIO2
1993
JOURNAL OF PHYSICAL CHEMISTRY
JAN 21-23
P13669
Author
R. Su
Aarhus University
M. Christensen
Aarhus University
Y. B. Shen
Aarhus University
J. Kibsgaard
Aarhus University
Björn Neo Esbjörnsson Elgh
Chalmers, Chemical and Biological Engineering, Applied Surface Chemistry
R. T. Vang
Aarhus University
R. Bechstein
Aarhus University
S. Wendt
Aarhus University
Anders Palmqvist
Chalmers, Chemical and Biological Engineering, Applied Surface Chemistry
B. B. Iversen
Aarhus University
F. Besenbacher
Aarhus University
Journal of Physical Chemistry C
1932-7447 (ISSN) 1932-7455 (eISSN)
Vol. 117 51 27039-27046Subject Categories
Chemical Engineering
DOI
10.1021/jp4106713