Coating method of amorphous type titanium peroxide

A method for fixing an amorphous type titanium peroxide layer on a substrate, which comprises the steps of:

• coating the substrate with a viscous amorphous type titanium peroxide without hydrophilization treatment of a surface of the substrate with a surface active agent or the like, and then drying and calcining the coated substrate at ordinary temperature to less than 250° C.

A method for fixing a titanium oxide layer on a substrate, which comprises the steps of:

• coating the substrate with an amorphous type titanium peroxide sol, and then drying and calcining the coated substrate at 250° C. or more.

A method for fixing a titanium oxide layer on a substrate, which comprises the steps of:

• coating the substrate with a viscous amorphous type titanium peroxide without hydrophilization treatment of a surface of the substrate with a surface active agent or the like, and then drying and calcining the coated substrate at 250° C. or more.

A method for fixing a thin layer of a photocatalytic semiconductor, a dielectrical ceramic material or a conductive ceramic material on a substrate, which comprises the steps of:

• coating the substrate with an amorphous type titanium peroxide sol to form an amorphous type titanium peroxide layer, and then attaching fine particles of the photocatalytic semiconductor, the dielectrical ceramic material or the conductive ceramic material in a uniformly scattered state in a gas onto the amorphous type titanium peroxide layer, while the amorphous type titanium peroxide layer is still sticky.

A method for fixing a thin layer of a photocatalytic semiconductor, a dielectrical ceramic material or a conductive ceramic material on a substrate, which comprises the steps of:

• coating the substrate with a viscous amorphous type titanium peroxide without hydrophilization treatment of a surface of the substrate with a surface active agent or the like, to form an amorphous type titanium peroxide layer, and then attaching fine particles of the photocatalytic semiconductor, the dielectrical ceramic material or the conductive ceramic material in a uniformly scattered state in a gas onto the amorphous type titanium peroxide layer is still sticky.

A method for preparing viscous amorphous type titanium peroxide, which comprises the steps of:

• reacting a titanium tetrachloride solution with an ammonium hydroxide solution in an acidic range of pH 2 to 6, adding aqueous hydrogen peroxide to sedimented lightly bluish white orthotitanic acid hydrate, carrying out a reaction with stirring at a low temperature, and then curing it at ordinary temperature.