Title:
TITANIUM OXIDE-BASED PHOTOCATALYST, MANUFACTURING METHOD THEREFOR AND ITS APPLICATION
Document Type and Number:
Japanese Patent JP3894144
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a photocatalyst which stably exhibits a high photocatalytic action under visible light irradiation and which is easily mass-produced.
SOLUTION: The metal halide-containing titanium oxide-based photocatalyst is obtained by subjecting titanium oxide and/or its precursor to heat treatment if necessary, and then subjecting the resultant product to further heat treatment while bringing it into contact with a reaction gas containing a metal halide expressed by the formula: MXn or MOXn (M= a metal, X= a halogen, n= an integer). The obtained photocatalyst demonstrates the high photocatalytic action stably under visible light irradiation. The photocatalyst may be stabilized by contact with water or further heat-treatment, and/or may be brought into contact with a heteropolyacid and/or isopolyacid to be further highly activated by introducing a metal complex into titanium oxide. The photocatalyst obtained by these methods shows novel ESR (electron spin resonance) characteristics. Other methods for manufacturing these photocatalysts, a photocatalyst dispersion liquid and a coating liquid containing the photocatalyst, a photocatalyst functional member utilizing the photocatalyst and a manufacturing method therefor are also provided.
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Inventors:
Yasuhiro Masaki
Tadashi Yao
Katsuhiro Nishihara
Haruhiko Kajimura
Katsumi Okada
Michiyasu Takahashi
Tadashi Ogasawara
Munetoshi Watanabe
Shinji Shimozaki
Koji Oda
Nagaoka Satanobu
Tadashi Yao
Katsuhiro Nishihara
Haruhiko Kajimura
Katsumi Okada
Michiyasu Takahashi
Tadashi Ogasawara
Munetoshi Watanabe
Shinji Shimozaki
Koji Oda
Nagaoka Satanobu
Application Number:
JP2003078084A
Publication Date:
March 14, 2007
Filing Date:
March 20, 2003
Export Citation:
Assignee:
SUMITOMO METAL INDUSTRIES,LTD.
Sumitomo Titanium Co., Ltd.
Sumitomo Titanium Co., Ltd.
International Classes:
B01D53/86; B01J23/30; B01J35/02; B01J27/10; B01J27/128; B01J27/132; B01J27/135; B01J27/188; C09D1/00; C09D5/00; C09D7/12; C09D201/00; (IPC1-7): B01J35/02; B01D53/86; B01J23/30; B01J27/10; B01J27/128; B01J27/132; B01J27/135; B01J27/188; C09D1/00; C09D5/00; C09D7/12; C09D201/00
Domestic Patent References:
| JP7265714A | ||||
| JP11255514A | ||||
| JP9192496A | ||||
| JP10033990A | ||||
| JP11104500A | ||||
| JP10113563A | ||||
| JP2001190953A | ||||
| JP2002239395A | ||||
| JP2003210998A | ||||
| JP2002110261A | ||||
| JP11512336A |
Foreign References:
| WO2000018504A1 | ||||
| WO2001056928A1 | ||||
| WO2002040609A1 |
Attorney, Agent or Firm:
Shoichi Hirose
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