Photocatalytic film structure

Patent metadata

Field	Value
Publication number	US-9381494-B2
Application number	US-201414248799-A
Country	US
Kind code	B2
Filing date	Apr 9, 2014
Priority date	Dec 31, 2013
Publication date	Jul 5, 2016
Grant date	Jul 5, 2016

Abstract

A photocatalytic film structure is provided. The photocatalytic film includes a plurality of micron particles; a plurality of nano particles; and a plurality of block bodies, wherein the volume of each of the block bodies is greater than that of each of the nano particles, and each of the micron particles, the nano particles and the block bodies contains zinc oxide and a doping metal, and wherein the amount of the doping metal is 1 to 5 wt % of the photocatalytic film, and the plurality of micron particles and micron particles take up 10 to 50% of the volume of the photocatalytic film.

First claim

What is claimed is:

1. A photocatalytic film structure, comprising:
a plurality of micron particles;
a plurality of nano particles; and
a plurality of block bodies,
wherein a volume of each of the block bodies is greater than that of each of the nano particles; each of the micron particles, the nano particles and the block bodies contains zinc oxide and a doping metal;
an amount of the doping metal is 1 to 5 wt % of the photocatalytic film structure; and
the plurality of micron particles and the plurality of nano particles take up 10 to 50% of the volume of the photocatalytic film structure, and
wherein the photocatalytic film structure has a thickness ranging from 20 to 70 μm.

2. The photocatalytic film structure of claim 1 , wherein the plurality of micron particles have a particle diameter ranging from 5 to 45 μm.

3. The photocatalytic film structure of claim 1 , wherein the plurality of nano particles have a particle diameter ranging from 95 to 195 nm.

4. The photocatalytic film structure of claim 1 , which has porosity ranging from 1 to 20%.

5. The photocatalytic film structure of claim 1 , wherein the doping metal is at least one element selected from the group consisting of Al and Ag.

6. The photocatalytic film structure of claim 1 , wherein the zinc oxide takes up 95 to 99 wt % of the photocatalytic film structure.

7. The photocatalytic film structure of claim 1 , which is formed on a substrate.

8. The photocatalytic film structure of claim 7 , wherein the substrate is one selected from the group consisting of a metal, an alloy, ceramics and glass.

9. The photocatalytic film structure of claim 7 , wherein the sizes of some of the block bodies in a direction parallel to a surface of the substrate are greater than the sizes in a direction perpendicular to the surface of the substrate.

Assignees

• Ind Tech Res Inst

Inventors

• Liu wu-han
• Hsiao Wei-Tien
• Liu Mao-Shin
• Leu Ming-Sheng
• Su Cherng-Yuh
• Shieu Fuh-Sheng
• Lu Chin-Te

Classifications

• B01J35/45

  Nanoparticles · CPC title

• B01J35/40

  characterised by dimensions, e.g. grain size (in a colloidal state B01J35/23; crystallite size B01J35/77) · CPC title

• B01J37/023

  using molten compounds · CPC title

• B01J37/0225

  of metal substrates · CPC title

• B01J37/349

  making use of flames, plasmas or lasers · CPC title