Self-wetting triphase photocatalytic composite, method of preparing same, and air purification method using same

Patent metadata

Field	Value
Publication number	US-12544479-B2
Application number	US-202117462242-A
Country	US
Kind code	B2
Filing date	Aug 31, 2021
Priority date	Jul 1, 2021
Publication date	Feb 10, 2026
Grant date	Feb 10, 2026

Abstract

Proposed is a photocatalytic complex. The photocatalytic complex includes a photocatalyst, and an iodine compound layer formed on a surface of the photocatalyst to cover the same and containing an iodine compound. The present disclosure enables selective degradation of hydrophilic volatile organic compounds by the use of the photocatalyst coated with the iodine compound.

First claim

What is claimed is:

1 . A photocatalytic complex consisting of:
a photocatalyst; an iodine compound layer formed on a surface of the photocatalyst to cover the same and containing an iodine compound; and a water layer on a surface of the photocatalytic complex covering the same, wherein the iodine compound comprises at least one selected from the group consisting of periodic acid (HIO 4 ) and periodic acid hydrate (HIO 4 ·2H 2 O).

2 . The photocatalytic complex of claim 1 , wherein the water layer is formed by self-wetting of the iodine compound.

3 . The photocatalytic complex of claim 1 , wherein the photocatalyst comprises at least one selected from the group consisting of tungsten trioxide (WO 3 ), bismuth vanadate (BiVO 4 ), titanium dioxide (TiO 2 ), and nitrogen (N)-doped titanium dioxide (N—TiO 2 ).

4 . The photocatalytic complex of claim 3 , wherein the photocatalyst comprises tungsten trioxide (WO 3 ).

5 . The photocatalytic complex of claim 1 , wherein a cation of the photocatalyst binds with an oxygen atom (O) of the iodine compound.

6 . The photocatalytic complex of claim 1 , wherein the photocatalytic complex degrades a volatile organic compound.

7 . The photocatalytic complex of claim 6 , wherein the volatile organic compound comprises at least one selected from the group consisting of formaldehyde (FA), acetaldehyde (AA), methanol (MeOH), isopropanol (IPA), acetone (AT), dichloromethane (DCM), n-pentane (C5), n-chloropropane (CIC3), and toluene (Tol).

8 . The photocatalytic complex of claim 6 , wherein the photocatalytic complex performs catalytic reactions among gas, liquid, solid phases, wherein
the gas phase includes the volatile organic compound, the liquid phase includes the water, and the solid phase includes the photocatalyst and the iodine compound layer.

9 . A photocatalytic system comprising:
a substrate; and a photocatalytic complex layer formed on the substrate and including a plurality of photocatalytic complexes, wherein each of the photocatalytic complexes consists of: a photocatalyst; an iodine compound layer formed on a surface of the photocatalyst to cover the same and containing an iodine compound; and a water layer on a surface of the photocatalytic complex covering the same, wherein the iodine compound comprises at least one selected from the group consisting of periodic acid (HIO 4 ) and periodic acid hydrate (HIO 4 ·2H 2 O).

Assignees

• Postech Res & Business Dev Found

Inventors

• Choi Wonyong
• He Fei

Classifications

• B01J35/39 Primary

  Photocatalytic properties · CPC title

• B01J37/04

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

• B01D2257/708

  Volatile organic compounds V.O.C.'s · CPC title

• B01D2255/802

  Photocatalytic · CPC title

• B01D2255/20776

  Tungsten · CPC title