Porous inorganic material having pore walls of crystalline titanium oxide and method of producing same

• US 6,544,637 B1
• Filed: 11/14/2000
• Issued: 04/08/2003
• Est. Priority Date: 11/16/1999
• Status: Expired due to Fees

• Current Assignee: National Institute of Advanced Industrial Science and Technology (Government of Japan)
• Original Assignee: National Institute of Advanced Industrial Science and Technology (Government of Japan)
• Inventors: Kosuge, Katsunori
• Primary Examiner(s): Morris, Terrel
• Assistant Examiner(s): ROCHE, LEANNA M
• Application Number:
  US09/711,132
• Time in Patent Office: 875 Days
• Field of Search: 428/307.3, 428/312.6, 428/312.8, 428/319.3, 428/319.9, 423/701, 423/702, 423/703, 423/704, 423/705, 423/710, 423/713, 423/715, 423/610, 502/350, 501/134, 501/154
• US Class Current: 428/312.2
• CPC Class Codes: B01J 21/063 Titanium; Oxides or hydroxides thereof
• CPC Class Codes: B01J 35/613 10-100 m2/g
• CPC Class Codes: B01J 35/615 100-500 m2/g
• CPC Class Codes: B01J 35/633 less than 0.5 ml/g
• CPC Class Codes: B01J 35/643 less than 2 nm
• CPC Class Codes: B01J 35/647 2-50 nm
• CPC Class Codes: B01J 37/03 Precipitation; Co-precipitation
• CPC Class Codes: C01G 23/0532 by hydrolysing sulfate-containing salts
• CPC Class Codes: C01P 2002/72 by d-values or two theta-values, e.g. as X-ray diagram
• CPC Class Codes: C01P 2002/82 by IR- or Raman-data
• CPC Class Codes: C01P 2006/12 Surface area
• CPC Class Codes: C01P 2006/14 Pore volume
• CPC Class Codes: C01P 2006/16 Pore diameter
• CPC Class Codes: C01P 2006/17 Pore diameter distribution
• CPC Class Codes: Y10T 428/249956 Void-containing component is inorganic
• CPC Class Codes: Y10T 428/249967 Inorganic matrix in void-containing component
• CPC Class Codes: Y10T 428/249969 Of silicon-containing material [e.g., glass, etc.]
• CPC Class Codes: Y10T 428/24997 Of metal-containing material
• CPC Class Codes: Y10T 428/249991 Synthetic resin or natural rubbers
• CPC Class Codes: Y10T 428/249993 Hydrocarbon polymer
• CPC Class Codes: Y10T 428/283 : Water activated
• CPC Class Codes: Y10T 428/31862 : Melamine-aldehyde

Abstract

An inorganic porous material, having uniform pores defined by pore walls of crystalline titanium oxide. The inorganic porous material may be produced by heating an organic inorganic mesostructured material containing titanium and having a hexagonal crystal phase at a temperature and for a period of time sufficient to form a porous material having a multiplicity of pores defined by pore walls containing crystalline titanium oxide.

Claims

1. An inorganic porous material, having pores of uniform pore diameter and defined by pore walls comprising anatase form crystalline titanium oxide and silica, said porous material having a pore diameter of 0.9-7 nm, a pore volume of 0.06-0.25 ml/g and a specific surface area of 40-500 m²/g, wherein said porous material has an x-ray diffraction pattern showing a peak for anatase, but no peak attributable to a rutile phase.

2. An inorganic porous material as claimed in claim 1, wherein the pore walls further comprise a transition metal substituted for a portion of the titanium of said titanium oxide and/or a portion of the silicon of said silica.

3. An inorganic porous material as claimed in claim 1, produced by a method comprising heating an organic mesostructured material containing titanium and having a hexagonal crystal phase at a temperature and for a peroid of time sufficient to form a porous material having a multiplicity of pores defined by pore walls containing crystalline titanium oxide.

4. An inorganic porous material as claimed in claim 3, wherein said mesostructured material is obtained by reacting a liquid containing titanium oxysulfate with a liquid containing a surfactant to form precipitates, followed by isolation and drying of the precipitates.

5. An inorganic porous material according to claim 4 wherein said liquid containing titanium oxysulfate additionally contains a silicon alkoxide.