Title:
PHOTOCATALYTIC HYDROPHILIC MEMBER AND ITS PRODUCTION
Document Type and Number:
Japanese Patent JP3264317
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To obtain a photocatalytic member of which the surface can be kept highly hydrophilic for a long term by fixing a surface layer contg. a photocatalytic TiO2 and WO3 on the surface of a substrate and causing the surface to chemically adsorb a specific substance so that the surface exhibits a high hydrophilicity in response to photoexcitation of a photocatalyst.
SOLUTION: A surface layer contg. a photocatalytic TiO2 (e.g. anatase titanium oxide) and WO3 is fixed on the surface of a substrate (e.g. soda lime glass), and at least a part of the surface of the surface layer is caused to chemically adsorb an electron attractive substance having an electron attractive group stronger than a hydroxyl group of a sulfo, nitro, sulfuric, or nitric group. Pref. the surface hydrophilicity due to the photoexcitation of the photocatalyst is 10 degrees or lower in terms of contact angle. This member is produced e.g. by coating the surface of a substrate with a mixture comprising photocatalytic TiO2 particles and tungstic acid, applying (NH4)2SO4 thereto, and thermally treating at 400-800°C.
Inventors:
Atsushi Kitamura
Makoto Hayakawa
Makoto Hayakawa
Application Number:
JP32465496A
Publication Date:
March 11, 2002
Filing Date:
November 20, 1996
Export Citation:
Assignee:
Totou Equipment Co., Ltd.
International Classes:
B01J21/06; B01J23/30; B01J27/053; B01J35/02; B01J37/02; B60J1/00; C03C17/34; C09K3/00; E06B7/12; C09K3/18; (IPC1-7): C09K3/00; B01J23/30; B01J27/053; B01J35/02; B60J1/00; C03C17/34; E06B7/12
Domestic Patent References:
| JP10114544A | ||||
| JP10114545A | ||||
| JP6220218A | ||||
| JP1238867A | ||||
| JP1095635A | ||||
| JP11511109A |
Other References:
【文献】国際公開97/23572(WO,A1)