Heterojunctions on Titanium Oxide Nano Particles

Nanocrystalline anatase phase titanium oxide
converted from ammonium oxofluorotitanate by thermal
treatment was developed and a large bandgap
reduction due to the co-doping of high
concentrations of fluorine and nitrogen. It is 1.3
times the photocatalytic activities of P-25 due to
the visible region usage of Hg lamp light source.
The 11.2 times the visible photocatalytic activities
of P-25 using blue light-emitting diode as the light
source is obtained. The heterostructure of zinc
selenide/titanium oxide and zinc sulfide/titanium
oxide were prepared by metal-organic chemical vapor
deposition. The energy bandgap of zinc sulfide is
much larger than that of titanium oxide and can act
as a window for titanium oxide. It would not hinder
titanium oxide absorption and preserve the role of
fluorine and nitrogen co-doping. The energy bandgap
of zinc selenide is near the maximum intensity of
solar spectrum and acts as a sensitizer of titanium
oxide. Their photocatalytic activities are further
improved to 2.0 and 1.5 times higher than that of
commercial P-25, respectively.

Autorentext
Tsung-Hsiang Shih was born in Yilan, Taiwan, in 1977. He received M.S. and Ph.D degrees from the Department of EE at National Sun Yat-sen University in 2001 and 2006, respectively. He is an IEEE member. He currently worked in TSMC and involved in the research on nanotechnology, compound semiconductor materials and devices.

Klappentext
Nanocrystalline anatase phase titanium oxide converted from ammonium oxofluorotitanate by thermal treatment was developed and a large bandgap reduction due to the co-doping of high concentrations of fluorine and nitrogen. It is 1.3 times the photocatalytic activities of P-25 due to the visible region usage of Hg lamp light source. The 11.2 times the visible photocatalytic activities of P-25 using blue light-emitting diode as the light source is obtained. The heterostructure of zinc selenide/titanium oxide and zinc sulfide/titanium oxide were prepared by metal-organic chemical vapor deposition. The energy bandgap of zinc sulfide is much larger than that of titanium oxide and can act as a window for titanium oxide. It would not hinder titanium oxide absorption and preserve the role of fluorine and nitrogen co-doping. The energy bandgap of zinc selenide is near the maximum intensity of solar spectrum and acts as a sensitizer of titanium oxide. Their photocatalytic activities are further improved to 2.0 and 1.5 times higher than that of commercial P-25, respectively.