IRON BASED LAYERED DOUBLE HYDROXIDE AND ITS CALCINED DERIVATE AS EFFICIENT PHOTOCATALYSTS IN PHENOL REMOVAL
Journal Title: BULETINUL INSTITUTULUI POLITEHNIC DIN IASI, CHIMIE SI INGINERIE CHIMICA - Year 2017, Vol 63, Issue 2
Abstract
We report here the fabrication of novel semiconductor photocatalysts with high efficiency in the advanced oxidation reactions. Layered double hydroxides (LDHs) are nontoxic and environmental friendly anionic clays studied due to their photoresponses under UV, visible and solar irradiation. In this work ZnFeAlLDH and the derived mixed oxides obtained after calcination, denoted as ZnFeAl750 were synthesized and used for the first time in the process of phenol photodegradation under irradiation with a solar simulator. The structure and the optical properties of the catalysts were studied by XRD, FTIR and UV-Vis techniques. The photocatalytic tests were done using a solar simulator. The results demonstrate that ZnFeAlLDH has a specific hydrotalcite structure that transformed into highly homogeneous mixed oxides after calcination at 750°C. The tested catalysts are able to absorb light starting from the red region of the spectrum. Results show that the maximum photodegradation of phenol was reached with ZnFeAl750, which removed 70% from the initial concentration of the phenol pollutant after 6 h of irradiation with solar light.
Authors and Affiliations
ELENA-FLORENTINA GROSU, GABRIELA CARJA
Keywords
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