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Kaltech Technology

Photocatalytic technology of Kaltech

We have adopted a visible LED light that is optimally designed for a photocatalytic filter that reacts to visible light, and we offer our original added value not found in conventional photocatalysts.


  • Since we do not use ultraviolet rays, it won’t have much effect on living cretures and resins.

    • Adopts a photocatalytic material that reacts to visible light and a blue light-emitting LED that maximizes the effect when combined with this.
    • It suppresses the effects of ultraviolet rays on humans and pets, and the deterioration of plastics and rubber, which had problems with conventional photocatalytic filters.

  • LED is used as the light source, so it is compact, long lasting, and no need maintenance.

    • The life of the LED light source last for 40,000 hours (5,000 hours for the conventional UV tube).
    • Compared to conventional UV tubes, it is significantly smaller and has a longer life. As a result, it can be easily incorporated into various devices and the frequency of maintenance can be reduced.

  • High degree of freedom in design, so it can be customized to meet various needs.

    • 0.4mm thick stainless steel mesh filter coated with TiO2. Since it is thin and easy to process, cuatomer will be able to freely choose the size and shape to suit the produt needs.
    • A hybrid type that combines an oxidation catalyst filter is also available as an option. We will meet even more diverse needs.

Difference from conventional photocatalyst

Conventional photocatalystOur photocatalyst
Crystal structure Anatase type crystal system
(Excitation wavelength 388nm or less) 		Rutile type crystal system
+ By controlling crystal modification of metal promoter
Uses rutile columnar crystals
(Excitation wavelength 413nm or less)
Light source UV lamp, black light
(Conventional technology)		 Adopting visible light LED (400nm or more)
Feature
(issues)
  • Reacts only with UV light. (Human body and housing damage are a concern)
  • It is a spherical crystal, and the active sites of the oxidation and reduction catalysts are mixed in the crystal, so there is a high probability of deactivation due to recombination due to the reverse reaction.
  • Effect of suppressing recombination of excited holes (h+) and electrons (e-)
  • Achieves optical excitation up to 450 nm light


Crystal system of titanium oxide used as photocatalyst
Anatase typeRutile type
Bandgap energy*3.2eV3.0eV
[Light wavelength conversion]↓↓
Effective light wavelength388nm413nm

*Energy required for electrons to move freely





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