Impact of multi wall carbon nanotubes of photocatalytic properties of TiO2

Sve veća uporaba lijekova, pesticida i drugih sliĉnih proizvoda utjeĉe na oneĉišćenje vode. Takvi proizvodi spadaju u mikrooneĉišćenja koja zahtijevaju posebne uvijete proĉišćavanja. Jedan od naĉina proĉišćavanja su napredni oksidacijski procesi u koje spada i fotokazaliza. Za proces fotokatalize potrebna je prisutnost fotokatalizatora, jedan od fotokatalizatora koji se koristi u fotokatalizi je TiO2. Za poboljšanje svojstava TiO2 mogu se koristiti razliĉiti elementi, spojevi i ugljikove nanocijevi. U radu su pripremljeni fotokatlizatori TiO2 i TiO2/višestjene ugljikove nanocijevi s razliĉitim udjelima nanocijevi nanošenih sol-gel postupkom na staklenu mrežicu. Uspješno vezanje fotokatalizatora na staklenu mrežicu potvrĊeno je vizualno i SEM/EDS analizom. Ispitana su fotokatalitiĉka svojstva razgradnjom salicilne kiseline u reaktoru sa simuliranim sunĉevim zraĉenjem. UtvrĊeno je da udio od 5 % ugljikovih nanocijevi daje najbolje rezultate razgradnje salicilne kiseline fotokatalizom.The increasing use of medicines, pesticides and other similar products is affecting water pollution. Such products belong to microimpurities that require special purification conditions. One of the methods of purification is advance oxidation processes, which include photocatalysis. Photocatalysis requires the presence of photocatalysts, one of the photocatalysts used in photocatalysis is TiO2. Various elements, compounds and carbon nanotubes can be used to improve the properties of TiO2. In this paper photocatalysts from TiO2 and TiO2/multi walled carbon nanotubes with different proportions of nanotubes deposited by sol-gel process on a glass mesh has been prepared. The successful bonding of the photocatalyst to the glass mesh was confirmed visually and by SEM/EDS analysis. The photocatalytic properties were examined by decomposing salicylic acid in reactor with a simulated solar radiation. It was established that 5 wt.% of carbon nanotubes gave the best results for the degradation of salicylic acid by photocatalysis