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Elimination of direct red 264 using magnetic pure and Zn‐doped NiFe 2 O 4 nanophotocatalysts under visible light irradiation: Isothermic and kinetic studies

2019; Wiley; Volume: 38; Issue: 4 Linguagem: Inglês

10.1002/ep.13097

1944-7450

Mahnaz Kamel Attar Kar, Reza Fazaeli, Faranak Manteghi, Mahdi Ghahari,

Advanced Photocatalysis Techniques

Photocatalytic degradation of direct red 264 under visible light using NiFe 2 O 4 and Zn‐doped NiFe 2 O 4 nanoparticles was the primary goal of this work. Hence, NiFe 2 O 4 and Zn‐doped NiFe 2 O 4 nanoparticles were prepared by the sol–gel auto combustion method. The powder X‐ray diffraction pattern unveiled the formation of spinel phase of NiFe 2 O 4 with the average crystallite size determined from the Scherrer equation. The FTIR spectra of the samples revealed the vibration bands of Fe–O and Ni–O. The morphology and size of the synthesized nanoparticles have been observed by scanning electron microscopy. The band gap calculated using Kubelka–Munk function from the UV–visible diffuse reflectance spectra. Finally, removal of azo dye and corresponding kinetic and isothermic studies was examined. © 2019 American Institute of Chemical Engineers Environ Prog, 38:e13097, 2019