Photocatalytic Properties of Mechanochemically Synthesized Nanocrystalline ZnAl2O4 and CdSe |
| N.G. Kostovaa, Al. Eliyas a, M. Fabián b M. Achimovičová b and P. Baláž b
aInstitute of Catalysis, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria bInstitute of Geotechnics, Slovak Academy of Sciences, Košice, Slovakia |
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| Nanocrystalline powders of ZnAl2O4 and CdSe were prepared via mechanochemical synthesis. Powder slurries were coated as thin films on SiO2 thin layer chromatography (TLC) sheet by capillary method. The photocatalytic activity of the film coating was tested in a self-made gas-phase flat-plate continuous-flow photocatalytic reactor with toluene as model air contaminant. The tested nanocrystalline ZnAl2O4 turned out to be poor oxidation photocatalyst under UV irradiation. CdSe displays considerable photocatalytic activity under visible light, where TiO2 is inactive. The nonconventional one-step mechanochemical route to ZnAl2O4 and CdSe synthesis offers several advantages compared to traditional processing routes, including low-temperature solid state reactions at ambient temperature, absence of organic templates contamination and low expenses. |
DOI: 10.12693/APhysPolA.126.967 PACS numbers: 81.20.-n, 61.05.cp, 61.46.-w, 61.66.Fn |