About the mechanism of Photocatalyst

What is a catalyst?

A catalyst is a substance that does not change in a chemical reaction, but changes the reaction rate.

What is a photocatalyst?

A photocatalyst is a substance that uses the light energy to generate a catalytic action. Titanium oxide is a typical raw material. Titanium oxide photocatalyst accelerates the chemical reaction like a normal catalyst, and its surface becomes hydrophilic (easy to become wet) by light.

What is titanium oxide?

Titanium oxide is a white powder that is widely used as pigment in paints and is also used in cosmetics and paper. Titanium atoms are contained in relatively large amounts on the surface of the earth and are materials with few resource and environmental problems.

What is the required light?

A photocatalyst absorbs light and exerts a catalytic action, so light that can be absorbed is required. We use a material that has a catalytic effect on visible light with a wavelength longer than 400 nm

How long does titanium oxide last?

Since the titanium oxide photocatalyst itself is stable and so lasts semi permanently, but substances that cannot be decomposed (inorganic substances and a large amount of dirt) may adhere to the surface and lose its effect.

Is Photocatalytic Titanium Dioxide Safe?

Titanium oxide, which is a raw material for photocatalyst products, has a wide range of applications and is used not only as paints, cosmetics and foods, but also as food additives.

Why are photocatalysts not so popular?

Initially, the required light was ultraviolet light, so the technology could only be applied to wall materials used outdoors. In the last few years, a catalyst that can react with the light of long-lived LEDs with a wavelength longer than 400 nm of visible light has been developed, and it has become possible to apply it to various products.

How much does the photocatalyst (material) cost?

It is more expensive than HEPA filters and activated carbon filters, but it has the advantage of saving running costs because there is no replacement required.

About the effect of Photocatalyst

How is it different from previous photocatalyst products?

Since the catalyst with high reaction efficiency is used and the photocatalytic reaction capacity is maximized by Kaltech’s original technology (side flow structure), the disinfecting power/deodorizing power is different.

What kind of odor can be removed?

It decomposes major malodorous components such as isovaleric acid (odor of pet/socks), trimethylamine (garbage odor), and ammonia (toilet).

How long does the deodorization take?

Depending on the usage environment, the odor of the room will be eliminated in about 30 minutes.

What kind of bacteria can be taken?

Decomposes airborne bacteria (bacteria/mold).

How long does it take to sterilize?

Although general organic substances can be decomposed, the speed of decomposition varies depending on the environmental conditions.

What happens to the decomposed water?

Since the odor component is at the PPM level, the decomposed water becomes the water vapor level in the atmosphere. It does not get damp.

Is there any evidence that can be published?

There is data on the performance of removing “floating virus” and “acedaldehyde”.

Performance – VKMCS

Differences from other methods

What is the difference from ozone and chlorine deodorization?

The photocatalyst does not generate toxic substances such as ozone and chlorine because the photocatalyst adsorbs and decomposes harmful substances to the catalyst that is exposed to light, instead of releasing ozone and chlorine to decompose harmful substances.

What are the advantages of photocatalysts over other methods?

It is “safe and secure” technology that does not generate toxic substances such as ozone and chlorine, and maintenance-free such as a need for filter replacement, so it is easy to use and friendly to the household.


How effective is it?

The photocatalytic effect lasts semi permanently, although it changes under the environment of use. However, it would be in accordance with the LED’s duration.

Will the effect deteriorate?

The structure of the photocatalyst unit is a structure that does not easily collect dust. The LED is constantly lit during operation, so the catalyst does not deteriorate due to the self-cleaning effect.