Synthesis, Characterization and Application of Iron(II) Doped Copper Ferrites (CuII(x)FeII(1-x)FeIII2O4) as Novel Heterogeneous Photo-Fenton Catalysts.
Asfandyar KhanZsolt ValicsekOttó HorváthPublished in: Nanomaterials (Basel, Switzerland) (2020)
The heterogeneous photo-Fenton type system has huge fame in the field of wastewater treatment due to its reusability and appreciable photoactivity within a wide pH range. This research investigates the synthesis and characterization of iron(II) doped copper ferrite (CuII(x)FeII(1-x)FeIII2O4 nanoparticles (NPs) and their photocatalytic applications for the degradation of methylene blue (MB) as a model dye. The NPs were prepared via simple co-precipitation technique and calcination. The NPs were characterized by using Raman spectroscopy, X-ray diffractometry (XRD), scanning electron microscopy (SEM), and diffuse reflectance spectroscopy (DRS). SEM reveals the structural change from the spherical-like particles into needle-like fine particles as the consequence of the increasing ratio of copper(II) in the ferrites, accompanied by the decrease of the optical band-gap energies from 2.02 to 1.25 eV. The three major determinants of heterogeneous photo-Fenton system, namely NPs concentration, hydrogen peroxide concentration and pH, on the photocatalytic degradation of MB were studied. The reusability of NPs was found to be continuously increasing during 4 cycles. It was concluded that iron(II) doped copper ferrites, due to their favorable band-gap energies and peculiar structures, exhibit a strong potential for photocatalytic-degradation of dyes, for example, MB.
Keyphrases
- oxide nanoparticles
- wastewater treatment
- hydrogen peroxide
- visible light
- highly efficient
- electron microscopy
- high resolution
- quantum dots
- raman spectroscopy
- nitric oxide
- antibiotic resistance genes
- metal organic framework
- reduced graphene oxide
- density functional theory
- iron deficiency
- air pollution
- single molecule
- low grade
- ultrasound guided
- human health
- risk assessment
- mass spectrometry
- gold nanoparticles
- molecular dynamics
- electron transfer
- high speed