Photocatalytic pigments
The PS-Photonox is a highly specialized white pigment with a photocatalytic effect, which is characterized especially by their technical performance profile. PS-Photonox uniquely combines maximum stability with an excellent health profile.
PS-Photonox is an active pigment, in combination with the silicate binder it reduces harmful gases and odours and converts them to harmless substances. Simply under the influence of daylight – and without adversely affecting the diffusion capability of the wall structure. Thereby PS-Photonox contributes actively to a better air quality. PS-Photonox pigments are particularly suitable for those
areas where many people come and go as well as locations where special requirements in terms of indoor air quality apply - in entrance halls or stairwells, in hotels or restaurants, hospitals or schools.
PS-Photonox is an active pigment, in combination with the silicate binder it reduces harmful gases and odours and converts them to harmless substances. Simply under the influence of daylight – and without adversely affecting the diffusion capability of the wall structure. Thereby PS-Photonox contributes actively to a better air quality. PS-Photonox pigments are particularly suitable for those
areas where many people come and go as well as locations where special requirements in terms of indoor air quality apply - in entrance halls or stairwells, in hotels or restaurants, hospitals or schools.
The following noxious gases or pollutants are decomposed:
- Harmful gas pollution in internal space e.g. furniture or carpet fumes and cigarette smoke (formaldehyde / acetaldehyde)
- for air purification (nitrogen oxides, sulphoxides, chlorinated hydrocarbons, and similar)
- fat-like soiling as for example stearate
- Bacteria and mold spores can be significantly reduced through the use of photocatalysis.
- Formulations with photocatalytic pigments are able to decompose organic contaminants of the molecular level effectively, through the influence of light. Degradation products may be undermined and washed away by rain. The settlement of moss and algae is strongly inhibited in the outdoor area. The application is used on all closed or open pored mineral substrates.
Photocatalytic self-cleaning denotes a property of surfaces that have been coated with photocatalysts, for example nano particles of titanium dioxide (TiO2). By irradiation with (Sun) light are decomposed organic materials on the surface. The surfaces stay clean and work anti-microbial. Some of these surfaces, water forms no droplets but a thin layer so that the eye no fogging these surfaces is to see ("Super hydrophilic surface").
Action in the case of titanium dioxide.
Photocatalysis is based of the procedure. Titanium dioxide (TiO2) is a semiconductor; Light creates electron-hole pairs in it if the energy of the photons is greater than the band gap of EC (inner photoelectric effect). The electrons or holes can diffuse into the titanium dioxide on the surface and generate radicals that result in the decomposition of organic matter there. In particular, the holes have a strong oxidative effect; OH radicals are formed from water (H2O). Organic substances are decomposed in this way; Final products are CO2 and water.
Action in the case of titanium dioxide.
Photocatalysis is based of the procedure. Titanium dioxide (TiO2) is a semiconductor; Light creates electron-hole pairs in it if the energy of the photons is greater than the band gap of EC (inner photoelectric effect). The electrons or holes can diffuse into the titanium dioxide on the surface and generate radicals that result in the decomposition of organic matter there. In particular, the holes have a strong oxidative effect; OH radicals are formed from water (H2O). Organic substances are decomposed in this way; Final products are CO2 and water.
The band gap of Anatase, the most efficient for photo-Catalysis form of TiO2, is 3.2 eV (the less efficient crystal structure rutile approx. 3.0 eV), this corresponds to a light wavelength of about 390 nm. Thus, ultraviolet light is needed for photocatalysis. Since the UV range accounts for only a small proportion of the sunlight, there are efforts to reduce the gap of Anatase by doping and to take advantage of a larger area of the solar spectrum.
The Super hydrophilic properties of the surfaces come oxygen spaces on the surface of the TiO2. In these places, OH groups are bound, which lead to the good wetting with water.
The Super hydrophilic properties of the surfaces come oxygen spaces on the surface of the TiO2. In these places, OH groups are bound, which lead to the good wetting with water.
