Structural, Optical, Magnetic and Photocatalytic Properties of Zn Doped CoFe₂O₄ Decorated Bentonite Nanocomposites

Abstract

The bentonite-Zn doped CoFe 2 O 4 photocatalysts were successfully synthesized for the first time by decorating magnetic Zn x Co 1À x Fe 2 O 4 nanoparticles onto the bentonite surface in order to enhance the photocatalytic performance of Zn doped CoFe 2 O 4 nanoparticles. We tried to thoroughly investigate how changes in Zn 2 + concentration affected the particle size, shape, magnetic properties, optical band gap, and photocatalytic activities of B-Zn x Co 1À x Fe 2 O 4 nanocomposites. The photodegradation of crystal violet (CV), a model reaction under visible light irradiations, was used to assess the photocatalytic activities of the samples. Compared to other samples, the B-Zn x Co 1À x Fe 2 O 4 (x = 0.5) showed the highest photocatalytic activity, which is best matched to the pseudo-first-order kinetic. According to investigations using reactive species capture, the superoxide radicals have the main role in the degrading process, while the hydroxyl radicals and holes have a secondary and minimal effect, respectively.

Synthesis of CoFe2O4/TiO2/PANI Nanocomposite Photocatalyst, and Examination of Its Decolorization Efficiency on Rhodamine B

“…Although these techniques can be used effectively, photocatalysis has emerged as a hopeful treatment technology due to reasons such as reusability, cheapness, and effective removal. Heterogeneous photocatalysis is widely used to completely decompose various organic and inorganic substances known as environmental pollutants [7] . Semiconductor photocatalysts such as TiO 2 , ZnO, WO 3 , ZnS, Bi 2 S 3 and CdS have a wide range of uses and great advantages over other semiconductors due to their reusable and high stability properties [8] …”

“…Heterogeneous photocatalysis is widely used to completely decompose various organic and inorganic substances known as environmental pollutants. [7] Semiconductor photocatalysts such as TiO 2 , ZnO, WO 3 , ZnS, Bi 2 S 3 and CdS have a wide range of uses and great advantages over other semiconductors due to their reusable and high stability properties. [8] Titanium dioxide (TiO 2 ), which is used extensively in different application areas such as gas sensors, photocatalysts, and solar cells, is a semiconductor that is frequently studied in the literature.…”

Removal of Cr6+ ions and mordant violet 40 dye from liquid media using Pterocladia capillacea red algae derived activated carbon-iron oxides

“…), which show ferrimagnetism in bulk state, shows superparamagnetism at the nanoscale 37 , 38 . Magnetic separation is a renewable recycling technology that is widely applied in chemistry, physics and other separation processes such as drug delivery, catalysis, magnetic resonance imaging (MRI), tissue repair and molecular diagnostics due to its fast and non-contact magnetic response 39 , 40 . Fe 3 O 4 nanoparticles can adsorb various dyes from the aquatic environment.…”