Photocatalytic properties of Ni1-xFexO nanoparticles synthesized by a freeze-drying process

Brito A.S.D.; Oliveira A.A.; Valerio-Cuadros M.I.; Tupan L.F.D.S.; Cid C.C.P.; Macruz P.D.; Nippes R.P.; Zanuto V.S.; dos Santos O.A.A.; Paesano A., Jr. · Materials Chemistry and Physics (2023) · DOI: 10.1016/j.matchemphys.2023.127488

Resumen

Ni1-xFexO nanoparticles were synthesized by heat treatment at 600 °C of the powder resulting from lyophilization of the aqueous mixture of nickel and iron acetate, and their photocatalytic properties were tested. The nanoparticles were preliminarily characterized by X-ray diffraction, transmission electron microscopy, Fourier-transform infrared spectroscopy, and UV-VIS diffuse reflectance spectroscopy. The results revealed monophasic samples up to x = 0.04 and that increasing iron concentration decreased the particle size and bandgap. The photocatalytic activity of Ni1-xFexO (x = 0.00, 0.02 and x = 0.04) samples under UV irradiation was investigated using the Reactive Blue 250 as a molecule test. Photocatalytic tests showed that Ni0.98Fe0.02O nanoparticles performed the best, which was attributed to the bandgap of this sample, presenting the smallest among the tested samples.

Instituciones: Universidad Nacional Mayor de San Marcos