Titanium oxide particle, composition for forming photocatalyst, and photocatalyst

Patent metadata

Field	Value
Publication number	US-10155220-B2
Application number	US-201715491030-A
Country	US
Kind code	B2
Filing date	Apr 19, 2017
Priority date	Dec 12, 2016
Publication date	Dec 18, 2018
Grant date	Dec 18, 2018

Abstract

A titanium oxide particle includes bonded thereon a metal-containing compound which has a hydrocarbon group, wherein the titanium oxide particle has an absorption at 450 nm and 750 nm in a visible absorption spectrum, and with respect to a surface of the particle, an element ratio M/Ti between metal M of the metal-containing compound and titanium is from 0.1 to 0.4 and an element ratio C/Ti between carbon C and titanium is from 0.3 to 1.2.

First claim

What is claimed is:

1. A titanium oxide particle comprising bonded thereon a metal-containing compound which has a hydrocarbon group,
wherein the titanium oxide particle has an absorption at 450 nm and 750 nm in a visible absorption spectrum,
with respect to a surface of the particle, an element ratio M/Ti between metal M of the metal-containing compound and titanium is from 0.1 to 0.4 and an element ratio C/Ti between carbon C and titanium is from 0.3 to 1.2, and
the titanium oxide particle comprises carbon obtained by carbonizing the hydrocarbon group.

2. The titanium oxide particle according to claim 1 ,
wherein the titanium oxide particle is any one of a brookite type, an anatase type, and a rutile type.

3. The titanium oxide particle according to claim 1 ,
which has an absorption in a range of a wavelength of 400 nm to 800 nm in the visible absorption spectrum.

4. The titanium oxide particle according to claim 1 ,
wherein an element ratio O/(M+Ti) between oxygen O and a total of the metal M and titanium with respect to the surface of the particle is from 2.05 to 2.5.

5. The titanium oxide particle according to claim 1 ,
wherein the metal of the metal-containing compound is silicon.

6. The titanium oxide particle according to claim 1 ,
wherein the metal-containing compound which has a hydrocarbon group is a compound represented by R 1 n MR 2 m wherein R 1 represents an aliphatic hydrocarbon group or an aromatic hydrocarbon group, which is saturated or unsaturated and has 1 to 20 carbon atoms, R 2 represents a halogen atom or an alkoxy group, n represents an integer of 1 to 3, and m represents an integer of 1 to 3, provided that n+m=4 is satisfied, in a case where n represents an integer of 2 or 3, plural R 1 may be the same or different, and in a case where m represents an integer of 2 or 3, plural R 2 may be the same or different.

7. The titanium oxide particle according to claim 1 ,
wherein the hydrocarbon group is a saturated aliphatic hydrocarbon group.

8. The titanium oxide particle according to claim 7 ,
wherein the number of carbon atoms of the saturated aliphatic hydrocarbon group is from 4 to 10.

9. The titanium oxide particle according to claim 1 ,
which has a volume average particle diameter of from 10 nm to 1 μm.

10. The titanium oxide particle according to claim 1 , wherein the titanium oxide particle contains a pore, and the carbon obtained by carbonizing the hydrocarbon group is in the pore.

11. A composition for forming a photocatalyst, comprising:
the titanium oxide particle according to claim 1 ; and
at least one compound selected from the group consisting of a dispersion medium and a binder.

12. The composition for forming a photocatalyst according to claim 11 ,
wherein the dispersion medium contains water.

13. The composition for forming a photocatalyst according to claim 11 ,
wherein the binder is a thermoplastic resin.

14. The composition for forming a photocatalyst according to claim 11 ,
wherein the binder is a thermosetting resin having a siloxane bond.

15. The composition for forming a photocatalyst according to claim 11 ,
wherein the binder is an inorganic compound.

16. A photocatalyst comprising the titanium oxide particle according to claim 1 .

17. The photocatalyst according to claim 16 , further comprising a promotor.

18. The photocatalyst according to claim 16 , further comprising an adhesive.

19. The photocatalyst according to claim 16 , further comprising a pressure-sensitive adhesive.

Assignees

• Fuji Xerox Co Ltd

Inventors

• Kashima Yasunobu
• Okuno Hiroyoshi
• Yoshikawa Hideaki
• Iwanaga Takeshi
• Takeuchi Sakae

Classifications

• B01J31/0274

  containing silicon (ligands in coordination complexes B01J31/1608) · CPC title

• B01J35/004 Primary

  Operations & Transport · mapped topic

• B01J21/063

  Titanium; Oxides or hydroxides thereof · CPC title

• B01J31/143

  of aluminium · CPC title

• B01J35/70

  characterised by their crystalline properties, e.g. semi-crystalline (catalysts comprising carbon B01J21/18; molecular sieves B01J29/00) · CPC title