Photocatalyst-coating on polymer substrates for UV protection and self cleanning and the method of preraration of photocatalyst sol

摘要

Photocatalysts are semiconducting materials that absorb light above their intrinsic bandgap energy and are excited by the photocatalyst to be excited and undergo an activation state to generate electron-hole charge pairs.;The electrons and holes generated as described above have a function of oxidizing or reducing organic substances and the like to decompose them.;Attempts have been made to apply such photochemical reactions to wastewater treatment, volatile organic matter (VOC) removal, odor removal and sterilization.;Apart from this, recent attempts have been made to see the effect of invincible self-cleaning by applying to building materials, which is an example of how wide a range of photocatalytic utilization systems have been. It is an important starting point to increase. In the present invention, to develop a polymer coating sol applied to the photocatalyst, to prevent the deterioration by ultraviolet (UV) of the current outdoor advertising facilities, and to prevent the contamination by air pollutants.;Its composition is a method for preparing SiO ₂ and photocatalyst sol for coating on polymer. The applied photocatalyst is a mixed photocatalyst such as ultra-fine TiO ₂ , Fe / Ti, Mo / Ti, etc., and the photocatalyst coating method on polymer is single and double coating immersion method and It is a spraying method (dipping and spray type), and it is effective to apply it to outdoor advertising facilities.