Novel multifunctional NiFe 2 O 4 /ZnO hybrids for dye removal by adsorption, photocatalysis and magnetic separation

Photocatalytic degradation of Direct Yellow-27 by photolysis with UV-light and solar irradiation Using N-doped TiO2

“…After that, charge carriers can migrate from the bulk [28,29] to the surface of the material. When this occurs in an aqueous medium, dissolved oxygen can be adsorbed [30,[30][31][32] on the surface of the photocatalyst and reduced by elec-trons, giving rise to superoxide radical anions, O2 − (Eq. 1), while holes can oxidize water as well as hydroxyl anions, producing hydroxyl radicals, HO (Eqs.…”

Effect of Tannic Acid on Photocatalytic Efficiency of NiFe2O4 and ZnO

“…With TA modification, efficiency of NiFe2O4 has been enhanced. To determine the reaction kinetics of the degradation of CR on photocatalysts, the apparent rate constants were calculated by the pseudo-first-order kinetics [4,19]. ln(C0/C)=kt (3.1) where k represents for the first-order rate constant.…”

“…So, the photogenerated electrons in NiFe2O4 are flown to TA and ZnO. In the meantime, the photogenerated holes are transferred from ZnO to NiFe2O4 [4,19]. The adsorbed oxygen molecules serve as the electron trapping to produce superoxide radicals.…”

Highly efficient and visible light driven Ni0.5Zn0.5Fe2O4@PANI modified BiOCl heterocomposite catalyst for water remediation

“…Also ferrites show good chemical stability, easy magnetic separation and low cost. It was found out that adsorption capacity, specific surface area and visible light driven photoactivity were improved by combining ferrites as codoped material with semiconductors such as BiOCl, TiO2 and ZnO [31][32][33]. Doping of spinel ferrites onto semiconductors could extend the UV light absorption of BiOCl to the entire visible region by reducing its gap energy and it does enhance its photocatalytic activity in the degradation of organic pollutant [34,35].…”