Thermally and photocatalytically active multifunctional porous coatings for high temperature applications

In this study, the thermal catalytic powder mixtures of Mn, Ce and Co oxides supported on Al₂O₃ were synthesized. In order to obtain thermally active porous coating on the steel substrate, a binder solution produced via sol-gel method was used to bind the synthesized powder. Additionally by incorporation of TiO₂ nanoparticles to previously described thermally active coating, both thermally and photocatalytically active multifunctional surfaces were obtained. The self-cleaning property and the rate of volatile organic compounds (VOC) degradation of the coatings were studied, in which pyrazine, thiazole, maltol, vanillin and toluene were applied as VOC. In TiO₂ applications UV illuminations were applied. In the self-cleaning performance tests using soybean oil, the thermally active coating was slightly better than the TiO₂ containing coatings. Under UV illumination, the high rates of VOC (photo) degradation was achieved with the thermally and photocatalytically active coating.