Title Alternative:Photolytic effect on textile fibers
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Technická Univerzita v Liberci
The development followed by an implementation of a systematic and comprehensive research with the objective of achieving photolytic textile materials. Environmental contamination is a growing problem that cannot be neglected as it influences our world and daily life. Eliminating contaminated compounds costs energy, which increases the CO2 emission that causes global warming. A solution for this dilemma can be found in the field of semiconductor chemistry, which implies the use of an inert ''environmentally harmonious'' catalyst, nonhazardous oxidants (oxygen) and solar energy input. In this way the contaminated environment can be gently harmonized to restore original conditions. If a wide-band gap semiconductor like titanium dioxide (TiO2) is irradiated with light, excited electron?hole pair's can be applied in chemical processes to create or degrade specific compounds. Titanium dioxide's hotocatalytic characteristics are greatly enhanced due to the advent of nanotechnology as the smallest amount TiO2P25 is able to cover a large surface area. TiO2 nanoparticles via an aqueous sol process at low temperature (method 1) and using polysiloxane binder (method 2) to hold the TiO2 particles within the substrate?s surface, successfully the textile fabrics of water purification, anti-bactericidal and high wettability with self-cleaning properties were successfully prepared. SEM has been adopted as the surface characterization technique. Small amount of light energy (900 ?W/cm2) was used, length of measurement was 15 cm. Photocatalyst applied in cotton samples showed high photolytic effect in comparison with polyester and polyamide and sol-gel process showed more capability and the thin films TiO2 showed incredible photocatalytic activity.
105 s., 13 s. příl. :il., tab., grafy +CD ROM
photocatalysis, sol-gel method, textile technology, fotokatalýza, metoda sol-gel, textilní technologie