Comparison of photocatalytic activity for different co-precipitated spinel ferrites
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The present work reports the co-precipitation synthesis and photocatalytic activity of MFe2O4 (M = Ni, Zn, Co, Cu, Mg) nanopowders. To compare their properties, all the powders were synthesized under similar synthesis conditions. Their structures and properties were determined by X-ray diffraction, scanning electron microscopy, X-ray photoelectron spectroscopy, UV–Vis diffuse reflectance spectra, nitrogen adsorption–desorption, and vibrating sample magnetometry. The results revealed the formation of single-phase spinel-structure magnetic nanoparticles with particle size <10 nm. All the samples exhibited strong light absorption in the visible range. Among the investigated nanopowders, nickel ferrite showed the highest photocatalytic activity and dye adsorption. The change in the light absorption intensity after 3 h of visible light irradiation of the dye over the NiFe2O4 photocatalyst reached ~70 %.
KeywordsSpinel ferrite Photocatalytic Co-precipitation
The authors gratefully acknowledge the financial support by the European Social Fund within the project ‘Elaboration of Innovative Functional Materials and Nanomaterials for Application in Environment Control Technologies” 1DP/188.8.131.52.0/13/APIA/VIAA/30. Financial support by the Estonian Ministry of Education and Research (target-financed theme IUT2-25) and the Estonian Nanotechnology Competence Centre (EU29996) is also gratefully acknowledged.
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