Title:
光触媒膜
Document Type and Number:
Japanese Patent JP4163374
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a photocatalyst membrane having improved catalytic efficiency and a method of producing the same. SOLUTION: The photocatalyst membrane contains TiO2 as a main component and has a multilayer structure in which the distribution of the porosity is such that the porosity is <=80% at the surface of the membrane and >=10% at the inside of the membrane, and the distribution of the average pore diameter is such that the average pore diameter is <=5 μm at the surface of the membrane and >=2 nm at the inside of the membrane and which is composed of not more than 10 layers, each having a membrane thickness of >=0.2 μm. In the photocatalyst membrane, the porosity and the average pore diameter are decreased toward the inside from the surface of the membrane, the thickness of the membrane is <=5 μm, the content of the metal particles is 0.01 to 30%, an average diameter of the metal particles is <=0.1 μm and the content of zeolite is 0.1 to 50%. Further, the method of producing the photocatalyst membrane comprises adding a binder to primary particles of TiO2 having an average particle size of <=100 nm, being a raw material, to obtain a slurry, then coating the slurry onto a substrate by a slip casting method and sintering the coated film.
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Inventors:
Masahiro Asayama
Noboru Segawa
Tsuneji Kameda
Akiko Suyama
Nishida victory
Yoshiyasu Ito
Noboru Segawa
Tsuneji Kameda
Akiko Suyama
Nishida victory
Yoshiyasu Ito
Application Number:
JP2000280570A
Publication Date:
October 08, 2008
Filing Date:
September 14, 2000
Export Citation:
Assignee:
Toshiba Corporation
International Classes:
B01D69/02; B01D53/86; B01J35/02; B01D71/02; B01J20/06; B01J20/18; B01J21/06; B01J23/40; B01J23/48; B01J27/16; B01J29/06; B01J35/10
Domestic Patent References:
| JP8099041A | ||||
| JP8196903A | ||||
| JP2000051712A | ||||
| JP2001070802A | ||||
| JP4027440A | ||||
| JP7144128A | ||||
| JP11216365A | ||||
| JP2002001126A |
Attorney, Agent or Firm:
Hisashi Hatano
Shunguchi Sekiguchi
Shunguchi Sekiguchi