Title:
【発明の名称】結晶質チタニア微粒子/粘土複合体およびその製造方法
Document Type and Number:
Japanese Patent JP3357566
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a porous titania fine particles/clay composite material having high photocatalyst activity, high durability in an acidic solution and a special specific surface area measured by a BET method (using Brunauer- Emmett-Teller's equation) in a nitrogen gas adsorption method and a method for increasing crystallinity of the titania particles in the composite material by specifying an average pore diameter measured. SOLUTION: This method highly crystallizes amorphous or low crystalline titania fine particles in a titania fine particles/clay composite material to an anatase type by a hydrothermal treatment and provides a porous crystalline titania fine particles/clay composite material having >=100m<2> /g specific surface area measured by a BET method. Used raw material clay is a mixture of at least one kind of montmorillonite as a swelling clay, smectite such as hectorite, vermiculite, synthetic mica and a fluorine-substituted analogous material, etc. A titania sol is reacted with clay to compound titania with the raw material clay. An average pore diameter as a measure of an interlaminar gap in the composite material does not exceed 15nm even after performing hydrothermal treatment at 250 deg.C for several days.
Inventors:
Chihiro Ooka
Application Number:
JP7079697A
Publication Date:
December 16, 2002
Filing Date:
March 06, 1997
Export Citation:
Assignee:
Nagoya city
International Classes:
B01J20/12; B01J21/16; B01J32/00; B01J35/02; C01B33/40; C01G23/04; (IPC1-7): C01G23/04; B01J20/12; B01J21/16; B01J32/00; B01J35/02; C01B33/40
Domestic Patent References:
| JP62187107A |
Attorney, Agent or Firm:
Terumasa Kato