There is an increasing need for simple and reliable procedure for characterization of photocatalytic activities of developed materials. The aim of this work was to develop a method for the determination of quantum yields of supported photocatalysts by employing an aqueous solution of coumarin. Coumarin is oxidized in the presence of irradiated TiO2 to 7-hydroxycoumarin, which could be fluorimetrically detected at low concentrations. Additionally, also a newly defined parameter, so called mass efficiency, was introduced as an advantageous way of defining the photocatalytic activities.
COBISS.SI-ID: 1064187
The authors studied the influence of the firing temperature of clay roofing tiles on their durability with emphasis on the resistance to algae and mould growth. Namely, the firing temperature of ceramic products significantly influences the development of microstructure and porosity, which are of key importance for durability and resistance of ceramics towards freezing temperatures as well as towards microbial attack on the surface. The method of microbial corrosion described in this paper is efficiently used also for the evaluation of resistance of self-cleaning photocatalytic surfaces.
COBISS.SI-ID: 1449319