High surface area photocatalyst material and method of manufacture

Patent metadata

Field	Value
Publication number	US-9522389-B2
Application number	US-201313790952-A
Country	US
Kind code	B2
Filing date	Mar 8, 2013
Priority date	Mar 9, 2012
Publication date	Dec 20, 2016
Grant date	Dec 20, 2016

Abstract

Photocatalytic materials are described herein which include thin nanostructures. For example, the catalytic material can include a nanostructure that has a thin structure of a photocatalytic composition, wherein the thin structure is defined by a first surface and a second surface on opposite sides of the thin structure of the photocatalytic composition. The photocatalytic composition may include an inorganic compound, such as a titanium and/or stannous oxide. The first surface and a second surface may be relatively large as compared to the thickness of the thin structure, or the thickness of the nanostructure.

First claim

We claim:

1. A photocatalytic material comprising:
a nanostructure comprising: a thin structure of a photocatalytic composition comprising titanium, tin, carbon, nitrogen, and oxygen, which is defined by a first surface and a second surface on opposite sides of the thin structure of the photocatalytic composition; and
wherein the square root of the area of the first surface is at least 3 times the thickness of the thin structure of the photocatalytic composition.

2. The photocatalytic material of claim 1 , wherein the nanostructure is a nanosheet-shaped, nanoflake-shaped, pseudoplanar-shaped, or ribbon-shaped.

3. The photocatalytic material of claim 1 , wherein at least a portion of the nanostructure is wavy.

4. The photocatalytic material of claim 1 , wherein the nanostructure comprises a pore that extends from the first surface to the second surface through the thin structure of the photocatalytic composition.

5. The photocatalytic material of claim 1 , wherein the nanostructure is free of pores that extend from the first surface to the second surface through the thin structure of the photocatalytic composition.

6. The photocatalytic material of claim 1 , having a Brunauer-Emmett-Teller (BET) specific surface area of at least 30 m 2 /g.

7. The photocatalytic material of claim 1 , wherein the thickness of the thin structure of the photocatalytic composition is about 10 nm to about 200 nm.

8. The photocatalytic material of claim 1 , wherein the square root of the area of the first surface is at least 10 times the thickness of the thin structure of the photocatalytic composition.

9. The photocatalytic material of claim 1 , wherein the photocatalytic composition is doped or loaded with carbon, nitrogen, or silver.

10. The photocatalytic material of claim 1 , wherein the photocatalytic composition comprises an oxide of titanium and tin, and is doped or loaded with carbon, nitrogen, and silver.

11. The photocatalytic material of claim 1 , wherein the photocatalytic composition comprises about 40% to about 99% titanium, based upon the total number of metal atoms in the composition.

12. The photocatalytic material of claim 1 , wherein the photocatalytic composition comprises about 0% to about 20% tin, based upon the total number of metal atoms in the composition.

13. The photocatalytic material of claim 1 , wherein the photocatalytic composition comprises about 0% to about 20% silver, based upon the total mass the composition.

14. The photocatalytic material of claim 1 , wherein the photocatalytic composition comprises about 2% to about 10% carbon, based upon the total mass the composition.

15. The photocatalytic material of claim 1 , wherein the photocatalytic composition comprises about 2% to about 5% nitrogen, based upon the total mass the composition.

Assignees

• Nitto Denko Corp

Inventors

• Sambandan Ekambaram
• Mukherjee Rajesh
• Fukumura Takuya
• Mochizuki Amane

Classifications

• B01J27/24 Primary

  Nitrogen compounds · CPC title

• B01J37/08

  Heat treatment {(B01J37/0009, B01J37/0018 take precedence)} · CPC title

• B01J27/22

  Carbides · CPC title

• B01J23/50

  Silver · CPC title

• B01J35/1019

  Operations & Transport · mapped topic