Nippon Soda Co., Ltd.

Kanagawa Academy of Science and Technology

Nec Corporation

Tetsuo Yoshimoto

Shigemichi Fukayama

Akira Fujishima

Kazuhito Hashimoto

Tomokazu Iyoda

Tokuyoshi Saitoh

Shinji Abe

Atsushi Ochi

Kazuaki Utsumi

Toru Mori

Nobuo Kimura

Yoshihiko Nakamura

Kazuo Ozawa

Iwao Kato

Makoto Asai

Masanori Iwamori

Nubuo Kimura

Souichiro Sugano

An illuminating device is made from a transparent hollow envelope that encloses a filler gas. The envelope has inner and outer surfaces. The illuminating device has a coating of a fluorescent material deposited on the inner surface of the transparent envelope where the fluorescent material emits light having a visible component and an ultraviolet component; and a titanium dioxide film having first and second opposing surfaces where the first surface of the titanium dioxide film is formed on the outer surface of the transparent envelope. A light transmittance of the titanium dioxide film is at least 50% for light having a wavelength of 550 nm, and the light transmitted from the fluorescent material through the transparent envelope and the first surface of the titanium dioxide film to the second surface thereof causes photocatalytic activity to be generated on the second surface of the titanium dioxide film.

Illuminating devices employing titanium dioxide photocatalysts

A titanium dioxide film () having at least photocatalytic activity, whose light linear transmittance corresponding to light having a wavelength of 550 nm is not less than 50% and whose thickness is 0.1 to 5 &#x3bc;m or so, is formed on a transparent substrate () constituted by a glass plate or the like. Preferably, a precoat film (), which has optical transmissivity and is constituted by a SiOfilm having a thickness of 0.02 to 0.2 &#x3bc;m or so, is provided between the transparent substrate () and the titanium dioxide film (). Thereby, excellent photocatalytic action and optical transmissivity can be obtained. Moreover, members composing various structures such as a glass window, which are especially required to have optical transparency, can be further provided with photocatalytic activities.

Window glass employing titanium dioxide photocatalyst

The present invention relates to photocatalyst-carrying structures which can be used particularly in an environment of high temperature and humidity or outdoor environment requiring alkali resistance and also to composites of photocatalyst coating materials to produce the said structures. The composites of photocatalyst coating materials are characterized in containing a photocatalyst and a zirconium compound and/or tin compound in order to endow alkali resistance. The photocatalyst-carrying structure has an adhesive layer between a photocatalyst layer and a carrier. The photocatalyst layer contains a photocatalyst, and a zirconium compound and/or tin compound to endow alkali resistance.

Photocatalytic coating composition and photocatalyst-bearing structure

The present invention provides a photocatalyst-carrying structure which has a structure, wherein an adhesive layer is provided in between a photocatalyst layer and a substrate, the adhesive layer is composed of silicon-modified resin, polysiloxane-containing resin or colloidal silica-containing resin, and for forming the photocatalyst layer a composition comprising a metal oxide gel or a metal hydroxide gel and a photocatalyst is used. Further, the present invention also provides a photocatalyst coating agent for producing a photocatalyst-carrying structure which contains silicon compound, at least one metal oxide sol or metal hydroxide sol, and at least one photocatalyst powder or sol.

Photocatalyst-carrying structure and photocatalyst coating material

Dielectric ceramic compositions

Composite oxyalkoxides and derivatives thereof

Growing community of inventors

Odawara, Japan

Tetsuo Yoshimoto