Title:
金属超微粒子担持光触媒及びその製造方法
Document Type and Number:
Japanese Patent JP3601752
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To obtain a photocatalytic substance composed of titanium dioxide wherein a particle size of supported metal superfine particles is a nano-scale and increased in photocatalytic efficiency. SOLUTION: A particle size of metal superfine particles is set to a range capable of markedly developing quantum size effect and an average particle size of metal superfine particles is numerically set to a range of 1-10nm. Hydrophobic colloid of an organometal complex and photocatalyst particles are mixed in a hydrophilic solvent to bond hydrophobic colloid on the surfaces of a photocatalyst particles and, after this mixed soln. is dried, the residue is baked to prepare a metal ultrafine particle supported photocatalyst. A colloid soln. of an organometal compd. and a photocatalyst powder are sprayed in a mutually opposed state to bond a large number of organometal compd. colloid on the surfaces of photocatalyst powdery particles and these colloid bonded particles are heat-treated on the way of falling to strongly support metal superfine particles on the surfaces of photocatalyst particles to continuously produce a metal superfine particle supported photocatalyst.
Inventors:
Akio Harada
Ryusuke Ueyama
Ryusuke Ueyama
Application Number:
JP22291297A
Publication Date:
December 15, 2004
Filing Date:
July 15, 1997
Export Citation:
Assignee:
Daiken Chemical Industry Co., Ltd.
Akio Komatsu
Akio Komatsu
International Classes:
B01J23/44; B01J23/48; B01J23/52; B01J35/02; B01J37/16; C07B61/00; C07C45/29; C07C47/06; C07C47/07; B01J23/42; C07C51/245; (IPC1-7): B01J35/02; B01J23/42; B01J23/52; B01J37/16; C07C45/29; C07C47/07; C07C51/245
Domestic Patent References:
| JP8283022A | ||||
| JP57194044A |
Other References:
Gratian R.Bamwenda,Photoassisted hydrogen production from a water-ethanol solution:a comparison of activities of Au-Ti,Journal of photochemistry and photobiology,1995年,89,p.177-189
Attorney, Agent or Firm:
Hisami Miki