Tubular titanium oxide particles and process for preparing same

Details Tubular titanium oxide particles and process for preparing same Tubular titanium oxide particles and process for preparing same

2002-10-29

2008-10-07

Le, H. T (Department: 1794)

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group ivb metal

C423S084000, C423S610000, C428S402000

Reexamination Certificate

active

07431903

ABSTRACT:
The process for preparing tubular titanium oxide particles comprises subjecting a water dispersion sol, which is obtained by dispersing (i) titanium oxide particles and/or (ii) titanium oxide type composite oxide particles comprising titanium oxide and an oxide other than titanium oxide in water, said particles having an average particle diameter of 2 to 100 nm, to hydrothermal treatment in the presence of an alkali metal hydroxide. After the hydrothermal treatment, reduction treatment (including nitriding treatment) may be carried out. The tubular titanium oxide particles obtained in this process are useful as catalysts, catalyst carriers, adsorbents, photocatalysts, decorative materials, optical materials and photoelectric conversion materials. Especially when the particles are used for semiconductor films for photovoltaic cells or photocatalysts, prominently excellent effects are exhibited.

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