Titanium oxide particle, composition for forming photocatalyst, and photocatalyst

Patent metadata

Field	Value
Publication number	US-10512895-B2
Application number	US-201815903093-A
Country	US
Kind code	B2
Filing date	Feb 23, 2018
Priority date	Apr 26, 2017
Publication date	Dec 24, 2019
Grant date	Dec 24, 2019

Abstract

A titanium oxide particle includes a metal compound having a titanium metal atom and a carbon atom, and being bonded to a surface of the particle via an oxygen atom, wherein an element ratio (C/Ti) between carbon and titanium on the surface is in a range of 0.2 to 1.1 and the titanium oxide particle has an absorption at a wavelength of each of 450 nm and 750 nm in a visible absorption spectrum.

First claim

What is claimed is:

1. A titanium oxide particle comprising:
a metal compound, which includes a titanium metal atom and a carbon atom bonded to a surface of the titanium oxide particle via an oxygen atom,
wherein an element ratio (C/Ti) between carbon and titanium on a surface of the particle is in a range of 0.2 to 1.1, and
wherein the titanium oxide particle has an absorption at a wavelength of each of 450 nm and 750 nm in a visible absorption spectrum.

2. The titanium oxide particle according to claim 1 ,
wherein the titanium oxide particle has an absorption in a whole range of wavelengths of from 400 nm to 800 nm in the visible absorption spectrum.

3. The titanium oxide particle according to claim 1 ,
wherein an element ratio (O/Ti) between oxygen and titanium on the surface is in a range of 2.05 to 2.50.

4. The titanium oxide particle according to claim 1 ,
wherein the carbon atom is included in a saturated aliphatic hydrocarbon group having 1 to 20 carbon atoms, an unsaturated aliphatic hydrocarbon group having 2 to 20 carbon atoms, or an aromatic hydrocarbon group having 6 to 20 carbon atoms.

5. The titanium oxide particle according to claim 1 ,
wherein the carbon atom is included in a saturated aliphatic hydrocarbon group having 1 to 20 carbon atoms.

6. The titanium oxide particle according to claim 1 ,
wherein the carbon atom is included in a saturated aliphatic hydrocarbon group having 4 to 10 carbon atoms.

7. The titanium oxide particle according to claim 1 ,
wherein a volume average particle diameter of the titanium oxide particles is in a range of 10 nm to 1 μm.

8. The titanium oxide particle according to claim 1 ,
wherein an element ratio (O/Ti) between oxygen and titanium on the surface is in a range of 2.10 to 2.40.

9. The titanium oxide particle according to claim 1 ,
wherein an element ratio (C/Ti) between carbon and titanium on the surface is in a range of 0.3 to 1.0.

10. 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.

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

Assignees

• Fuji Xerox Co Ltd

Inventors

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

Classifications

• B01J21/063 Primary

  Titanium; Oxides or hydroxides thereof · CPC title

• B01J37/0045

  Drying a slurry, e.g. spray drying · CPC title

• B01J31/38

  of titanium, zirconium or hafnium · CPC title

• C08L101/06

  containing oxygen atoms {(C08L101/025 takes precedence)} · CPC title

• C08L101/025

  containing nitrogen atoms · CPC title