Photocatalytic susbstance

• US 6,680,277 B2
• Filed: 07/17/2001
• Issued: 01/20/2004
• Est. Priority Date: 07/17/2000
• Status: Expired due to Term

• Current Assignee: Kabushiki Kaisha Toyota Chuo Kenkyusho (Toyota Motor Corporation)
• Original Assignee: Kabushiki Kaisha Toyota Chuo Kenkyusho (Toyota Motor Corporation)
• Inventors: Nakamura, Tadashi, Morikawa, Takeshi, Fukushima, Yoshiaki, Taga, Yasunori
• Primary Examiner(s): Hendrickson, Stuart L.
• Assistant Examiner(s): Lish, Peter J
• Application Number:
  US09/905,861
• Publication Number:
  US 20020006865A1
• Time in Patent Office: 917 Days
• Field of Search: 502/174, 502/200, 502/202, 502/208, 502/215, 502/237, 502/224, 502/340, 502/349, 502/350, 502/352, 502/226, 502/227, 502/182
• US Class Current: 502/182
• CPC Class Codes: B01J 35/30 characterised by their physical properties
• CPC Class Codes: B01J 35/39 Photocatalytic properties

Abstract

The invention features a photocatalytic body including: a porous medium 12 formed on a substrate 10; and photocatalytic material 14 supported on the porous medium. Supporting the photocatalytic material 14 on the porous medium 12 enables enhancement of its catalytic activity.

Claims

1. A photocatalytic substance, comprising:

a porous material; and

a photocatalytic material comprising MO_aX_b, wherein M is Ti, O is an oxygen, X is N, a=1.5 to 2.0, and b=0.01 to 0.5, supported on the porous material and which operates when exposed to visible light, and

wherein MO_a comprises a crystal structure, and X is doped to MO_a,

and wherein the porous material has a pore diameter of 3-10 nm.

2. The photocatalytic substance according to claim 1, wherein said porous medium is formed of alumina, silica, zirconia, titanium oxide, activated carbon, a mixture thereof or a composite thereof.

3. The photocatalytic substance according to claim 1, wherein said porous medium has mesopores.

4. The photocatalytic substance according to claim 3, wherein said porous medium has a honeycomb structure.

5. The photocatalytic substance according to claim 4, wherein said porous medium is formed on a substrate.

6. The photocatalytic substance according to claim 5, wherein said pores of said porous medium are oriented in a direction perpendicular to a surface of the substrate.