Photocatalytic material and method for fabrication the same

Patent metadata

Field	Value
Publication number	US-10894252-B2
Application number	US-201916512489-A
Country	US
Kind code	B2
Filing date	Jul 16, 2019
Priority date	Mar 3, 2017
Publication date	Jan 19, 2021
Grant date	Jan 19, 2021

Abstract

Provided is a fabrication method of a photocatalytic material in which a single layer of a carbon-based participate is formed on a surface of each of titanium dioxide particle. The method includes (a) loading titanium dioxide particles into an electric furnace comprising a mechanism for rotating a core tube; (b) heating an inside of the core tube of the electric furnace into which the titanium dioxide particles have been loaded to a temperature of not less than 400° C. and not more than 800° C., while an inert gas is introduced into the inside of the core tube; (c) supplying a hydrocarbon gas to the inside of the core tube in addition to the inert gas; and (d) performing a thermal CVD on each of the titanium dioxide particles in a fluidized state inside the core tube, while the core tube is rotated, to form a single layer of a carbon-based precipitate containing graphene on a surface of each of the titanium dioxide particles. A photocatalyst material is provided.

First claim

The invention claimed is:

1. A fabrication method of a photocatalytic material, the method comprising:
(a) loading titanium dioxide particles into an electric furnace comprising a mechanism for rotating a core tube;
(b) heating an inside of the core tube of the electric furnace into which the titanium dioxide particles have been loaded to a temperature of not less than 400° C. and not more than 800° C., while an inert gas is introduced into the inside of the core tube, wherein the heating brings the titanium dioxide particles into a fluidized state;
(c) supplying a hydrocarbon gas at a temperature of not less than 400° C. and not more than 800° C. to the inside of the core tube in addition to the inert gas; and
(d) performing a thermal CVD at a temperature of not less than 400° C. and not more than 800° C. on each of the titanium dioxide particles in the fluidized state inside the core tube, while the core tube is rotated, to form a single layer of a carbon-based precipitate containing graphene on a surface of each of the titanium dioxide particles,
wherein the single layer of the carbon-based precipitate covers 5% to 40% of the surface of each of the titanium dioxide particles.

2. The fabrication method of the photocatalytic material according to claim 1 , wherein
a thickness of the single layer of the carbon-based precipitate is not more than 0.5 nm.

3. The fabrication method of the photocatalytic material according to claim 1 , wherein
the thermal CVD is performed for 10 minutes to 60 minutes.

4. The fabrication method of the photocatalytic material according to claim 1 , wherein
the inert gas is nitrogen gas.

5. The fabrication method of the photocatalytic material according to claim 1 , wherein
the hydrocarbon gas contains an alkene gas.

6. The fabrication method of the photocatalytic material according to claim 5 , wherein
the alkene gas is propylene.

7. The fabrication method of the photocatalytic material according to claim 1 , wherein
the hydrocarbon gas is provided by bubbling the inert gas into an alcohol.

8. The fabrication method of the photocatalytic material according to claim 7 , wherein
the alcohol is methanol or ethanol.

Assignees

• Panasonic Ip Man Co Ltd

Inventors

• Hara Kohei
• KORI Shunsuke
• Hashimoto Yasuhiro
• Ino Daisuke

Classifications

• B01J21/18 Primary

  Carbon · CPC title

• B01J35/45

  Nanoparticles · CPC title

• B01J37/0223

  by rotation · CPC title

• C02F2305/10

  Photocatalysts · CPC title

• B01J37/084 Primary

  Decomposition of carbon-containing compounds into carbon · CPC title