Rapid Synthesis of Porous, Mixed Phase Titania Films with Tailored Orientation of Rutile for Enhanced Photocatalytic Performance
Artikel i vetenskaplig tidskrift, 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

P55

JOURNAL OF PHYSICAL CHEMISTRY

HYDROTHERMAL CONDITIONS

PHOTOREACTIVITY

FACETS

FRANCE

1993

1994

POWDER

V192

P13669

TIO2 SINGLE-CRYSTALS

GROWTH

SURFACE

NANOPARTICLES

OI WY

1993

V98

P55

JAN 21-23

NANORODS

UDY OF MAGNETISM

ANATASE TIO2

GRENOBLE

V205

AFFORD U

Författare

R. Su

Aarhus Universitet

M. Christensen

Aarhus Universitet

Y. B. Shen

Aarhus Universitet

J. Kibsgaard

Aarhus Universitet

Björn Neo Esbjörnsson Elgh

Chalmers, Kemi- och bioteknik, Teknisk ytkemi

R. T. Vang

Aarhus Universitet

R. Bechstein

Aarhus Universitet

S. Wendt

Aarhus Universitet

Anders Palmqvist

Chalmers, Kemi- och bioteknik, Teknisk ytkemi

B. B. Iversen

Aarhus Universitet

F. Besenbacher

Aarhus Universitet

Journal of Physical Chemistry C

1932-7447 (ISSN) 1932-7455 (eISSN)

Vol. 117 27039-27046

Ämneskategorier

Kemiteknik

DOI

10.1021/jp4106713