Res. Chem. Intermed.
, Vol. 27, No. 4,5, pp. 459–467 (2001)
The design and development of second-generation titanium
oxide photocatalysts able to operate under visible light
irradiation by applying a metal ion-implantation method
, S. KISHIGUCHI
, Y. ICHIHASHI
, M. TAKEUCHI
, K. IKEUE
, B. MORIN
, A. DAVIDSON
and M. CHE
Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University,
1-1 Gakuen-cho, Sakai, Osaka 599-8531, Japan
Laboratoire de Reactive de Surface, URA 1106-CNRS, Université P. et M. Curie, 4 place Jussieu,
Tour 54, 75252 Paris Cedex 05, France
Abstract—Unique second-generation titanium oxide photocatalysts enabling effective and ef cient
reactions not only under ultraviolet (UV) but also visible light irradiation have been successfully
designed and developed by applying a metal ion-implantation method. With these second-generation
titanium oxide photocatalysts,solar beams are absorbed up to 25–30% more ef ciently,allowing their
large scale use for the reduction of enviromental toxins.
Environmental pollution and destruction on a global scale have drawn attention to
the vital need for totally new, safe and clean chemical technologies and processes,
the most important challenge facing chemical scientists for the 21st century. Strong
contenders as environmentally harmonious catalysts are photocatalysts which can
operate at room temperature in a clean and safe manner while applications of such
photocatalytic systems are urgently desired for the puri cation of polluted water
and air, both on a local as well as a global scale [1–5]. To address such enormous
tasks, photocatalytic systems which are able to operate effectively and ef ciently
not only under UV but also under the most environmentally ideal and abundant
energy source — sunlight — must be established.
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