Photocatalyst

What is Photocatalyst?

• Photocatalyst means a function that substances work as catalyst if light exists such as a plant does photosynthesis.
• If light reaches photocatalyst materials, electron is excited from the valance band to conduction band, leaving the hole in valance band.
• The holes produce hydroxy radicals(+OH) to oxidation of H2O, electrons are transferred to oxygen so that produce superoxide anions(O2-).
• These oxidants(or reductants) decompose organic materials into CO2 and H2O.
• Photocatalyst materials can be used semi-permanently, because do not change themselves when a light exist.
• Photocatalyst are used TiO2 anatase type.

Photocatalyst's Merit(Strength)

• It works many functions such as anti-bacterial, deodorization, hydrophile property, decontamination etc.
• It can be used semi-permanently and does not harm person.
• It does not include organic materials.
• It is easy to use and adhesion good, compare with others' products.
• It have ~20㎚ size TiO2 particles and can be coated in glass without haze.
• It is possible for us to coat in anything.

Photocatalyst's effects

Decompose of organic materials

• TiO2 produce hydroxy radical and superoxide anion by reaction with H2O
• Decompose organic materials, NOx, SOx, Cl2, NH3 etc.

Anti-bacterial effects

• Sterilize bacterial and prevent 2nd contamination
• Works semi-permanently, so economic profits and convenience

Deodorizing effects

• Decompose offensive odors occurred closed in-door by chemical reaction
• Because of catalytic reaction, use semi-permanently

Self clean

• Possible to remove a remained contaminant by rain or water washing, because of hydrophilic effect.
• Can be reduced cleaning expensive

Photocatalyst products

Photocatalyst coating product

• It is used as upper coating material in indoor/outdoor. Its excellent photocatalyst effect can decompose VOC's such as formaldehyde, acdtaldehyde, ammonia etc. remove offensive odors and sterilize suspended bacteria. This product was produced by self-developed patent, include nano size Tio2 particles and have excellent photocatalyst effect. Also, it was suitable to indoor/outdoor because does not necessary high temperature heat-treatment.

Photocatalyst under - coating

• It is used as under coating materials in indoor/outdoor. It improves adhesion of substrate-upper coating so that improves durability. It protects substrate from photo-decompositon. Also, it consist of same component with upper coating, so affinity was good. It was suitable to indoor/outdoor because does not necessary high temperature heat-treatment.

Clean Plus

• It have strong deodorizing force remove VOC's and bad smells during photocatalyst drying period. Also, because of anti-bacterial effect, it is effect to remove suspended bacterial in initial period (but, its effect does not durability, within 3 months)