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US 12,544,740 B2Granted
Photocatalyst, catalyst filter, catalyst module, and air purification system including the same
AssigneeSamsung Electronics Co., Ltd.
InventorsMinseok Koo, Hyukjae Kwon, Dongsik Yang, Hyun Chul Lee, Jongmin Lee, Sangmin Ji
Life of this patent
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Abstract
A photocatalyst including a first metal oxide; and a second metal oxide, wherein the first metal oxide is disposed on a surface of the second metal oxide, and wherein absorbance of the photocatalyst in a wavelength region of about 200 nanometers (nm) to about 600 nm is about 5% to about 50% greater than an absorbance of TiO2 in the wavelength region of about 200 nm to about 600 nm.
Claims27
A photocatalyst, comprising:
- a first metal oxide;
- and
- a second metal oxide,
- wherein the first metal oxide is disposed on a surface of the second metal oxide, and
- wherein absorbance of the photocatalyst in a wavelength region of about 200 nanometers to about 600 nanometers is about 5% to about 50% greater than an absorbance of TiO2 in the wavelength region of about 200 nanometers to about 600 nanometers,
- wherein
- the first metal oxide consists of nano-sized primary particles, and
- the second metal oxide consists of micro-sized primary particles or secondary particles each comprised of a plurality of micro-sized primary particles.
5 more elements
A catalyst filter, comprising:
- a porous ceramic support;
- and
- a photocatalyst disposed on a surface of the porous ceramic support,
- wherein the photocatalyst comprises:
- a first metal oxide;
- and
- a second metal oxide,
- wherein the first metal oxide is disposed on a surface of the second metal oxide, and
- wherein absorbance of the photocatalyst in a wavelength region of about 200 nanometers to about 600 nanometers is about 5% to about 50% greater than an absorbance of TiO2 in the wavelength region of about 200 nanometers to about 600 nanometers,
- wherein
- the first metal oxide consists of nano-sized primary particles, and
- the second metal oxide consists of micro-sized primary particles or secondary particles each comprised of a plurality of micro-sized primary particles.
9 more elements
A catalyst module, comprising:
- a catalyst filter;
- and
- an energy supply source,
- wherein the energy supply source supplies energy to the catalyst filter for catalyst activation,
- wherein the catalyst filter comprises:
- a porous ceramic support;
- and
- a photocatalyst disposed on a surface of the porous ceramic support,
- wherein the photocatalyst comprises:
- a first metal oxide;
- and
- a second metal oxide,
- wherein the first metal oxide is disposed on a surface of the second metal oxide, and
- wherein absorbance of the photocatalyst in a wavelength region of about 200 nanometers to about 600 nanometers is about 5% to about 50% greater than an absorbance of TiO2 in the wavelength region of about 200 nanometers to about 600 nanometers,
- wherein
- the first metal oxide consists of nano-sized primary particles, and
- the second metal oxide consists of micro-sized primary particles or secondary particles each comprised of a plurality of micro-sized primary particles.
14 more elements
An air purification system, comprising:
- a supplier that supplies air comprising a gaseous volatile organic compound;
- and
- an air purifier comprising a catalyst module,
- wherein the air purification system substantially decomposes and substantially removes the gaseous volatile organic compound from the air supplied from the supplier, and discharges a purified air from which the gaseous volatile organic compound is substantially decomposed and substantially removed,
- wherein the catalyst module comprises:
- a catalyst filter;
- and
- an energy supply source,
- wherein the energy supply source supplies energy to the catalyst filter for catalyst activation,
- wherein the catalyst filter comprises:
- a porous ceramic support;
- and
- a photocatalyst disposed on a surface of the porous ceramic support,
- wherein the photocatalyst comprises:
- a first metal oxide;
- and
- a second metal oxide,
- wherein the first metal oxide is disposed on a surface of the second metal oxide, and
- wherein absorbance of the photocatalyst in a wavelength region of about 200 nanometers to about 600 nanometers is about 5% to about 50% greater than an absorbance of TiO2 in the wavelength region of about 200 nanometers to about 600 nanometers,
- wherein
- the first metal oxide consists of nano-sized primary particles, and
- the second metal oxide consists of micro-sized primary particles or secondary particles each comprised of a plurality of micro-sized primary particles.
19 more elements
Dependencies are inferred from the claim text.