B - Operations – Transporting – 01 – J
Patent
B - Operations, Transporting
01
J
B01J 35/02 (2006.01) A61L 9/00 (2006.01) A61L 9/20 (2006.01) B01J 19/12 (2006.01) B01J 35/04 (2006.01) F24F 1/00 (2006.01)
Patent
CA 2521168
An ultraviolet-responsive thin film photocatalyst and applications thereof. There is provided a transparent thin film titanium dioxide photocatalyst of 200 to 300 nm extinction wavelength peak and 0.1 to 1.0 micron film thickness wherein the crystal size of thin-film constituting titanium dioxide photocatalyst is in the range of 5 to 50 nm. There is further provided a photocatalyst as defined above characterized in that the crystal configuration of thin-film constituting titanium dioxide is of a mixture of spindle shaped crystal and cubic crystal. There is still further provided a filter characterized in that as a substrate, use is made of an inorganic paper composed mainly of silicon carbide (SiC), amorphous silica (SiO2) or silica or an inorganic paper composed mainly of active carbon, zeolite or sepiolite. There is still further provided an air filtering cleaning unit characterized in that the above filter is combined with a bactericidal ultraviolet lamp.
Photocatalyseur en couche mince sensible aux ultraviolets et applications de celui-ci. L'invention concerne un photocatalyseur de dioxyde de titane en couche mince transparente présentant un pic de longueur d'onde d'extinction compris entre 200 et 300 nm, et une épaisseur de film comprise entre 0,1 et 1,0 micron. La taille des cristaux du photocatalyseur de dioxyde de titane constituant la couche mince se situe entre 5 et 50 nm. L'invention concerne de plus un photocatalyseur tel que défini plus haut, caractérisé en ce que la configuration cristalline du dioxyde de titane constituant la couche mince est un mélange de cristaux en forme de tiges et de cristaux cubiques. L'invention concerne aussi un filtre caractérisé en ce que le substrat emploie un papier inorganique se composant principalement de carbure de silicium (SiC), de silice amorphe (SiO¿2?) ou de silice, ou d'un papier inorganique se composant principalement de charbon actif, de zéolithe ou de sépiolite. L'invention concerne en outre une unité épuration par filtrage d'air, caractérisée par l'utilisation combinée dudit filtre avec une lampe à rayonnement ultraviolet.
Kato Shigekazu
Taoda Hiroshi
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
Photo-Catalytic Materials Inc.
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