Structural and magnetic properties of ZnO–CoFe2O4 nanocomposites

Castro, T.J.; Silva, S. W. da; Nakagomi, F.; Moura, Natalia S.; Franco, A.; Morais, P.C.

doi:10.1016/j.jmmm.2015.04.036

Cited by 35 publications

(13 citation statements)

References 26 publications

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“…Some researchers have reported that ZnO as photocatalyst exhibit superior advantages than the others, which is ascribed to its higher quantum efficiency, chemical stability, non-toxicity, and lower cost 4,5 . Unfortunately, ZnO has a wide band gap (~3.37 eV), which is unfavorable for absorption well of visible light of solar 6,7 . In fact, visible light contributes more than 50% of the sun irradiation and it is important to fabricate an excellent visible-light response photocatalyst for the practical uses 8 .…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Zno-Nife2o4 Magnetic Nanocomposites by Simple Solvothermal Method for Photocatalytic Dye Degradation Under Solar Light

Rahmayeni¹,

Zulhadjri²,

Jamarun³

et al. 2016

Orient. J. Chem

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ZnO-NiFe 2 O 4 magnetic nanocomposite photocatalysts were successfully synthesized by simple solvothermal method using nitric salts as starting materials and ethanol as solvent. The synthesized samples were characterized by XRD, FESEM-EDX, TEM, DRS-UV-vis, VSM, and FTIR instruments. Photocatalytic activity of the samples was evaluated by dye degradation under solar light irradiation. The results show that the diffraction peaks of nanocomposites correspond to the hexagonal wurzite of ZnO and spinal cubic structure of NiFe 2 O 4 . The microstructure studies revealed that nanocomposites were dominated by granular-like of ZnO nanoparticles were synthesized at 180°C and rod-like at 200°C. The estimated band gap value of ZnO-NiFe 2 O 4 (1:0.01) nanocomposites is 2.78 eV which is lower than ZnO. The magnetic saturation (Ms) result showed a superparamagnetic behavior for nanocomposites. It was found that the photocatalytic activity of synthesized nanocomposites were higher than ZnO and NiFe 2 O 4 .

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Section: Introductionmentioning

confidence: 99%

Synthesis of Zno-Nife2o4 Magnetic Nanocomposites by Simple Solvothermal Method for Photocatalytic Dye Degradation Under Solar Light

Rahmayeni¹,

Zulhadjri²,

Jamarun³

et al. 2016

Orient. J. Chem

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“…The coercivity (Hc) of ferrite and composite samples is almost zero and the particles are superparamagnetic. The lower Ms of nanocomposites is caused by the diamagnetic properties of ZnO which reduce the magnetic nature of the MnFe 2 O 4 nanoparticles 22 . The nanocomposites containing magnetic behavior have profit due to separate easily from the liquid by the application of external magnetic field after applied and can be used for the next application.…”

Section: Magnetic and Optical Properties Analysismentioning

confidence: 99%

Magnetically Separable ZnO-MnFe2O4 Nanocomposites Synthesized in organic-free Media for dye Degradation Under Natural Sunlight

Rahmayeni¹,

Arief²,

Jamarun³

et al. 2017

Orient. J. Chem

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Magnetically separable ZnO-MnFe 2 O 4 nanocomposites were synthesized in organic-free media. The samples were characterized by several techniques. The photocatalytic activities of the nanocomposites were tested by degradation of Rhodamine B and wastewater of batik dye under natural sunlight irradiation. X-ray diffraction (XRD) pattern of composites is well in agreement with the standard of the hexagonal wurtzite phase of ZnO and spinel cubic phase of MnFe 2 O 4 . Scanning Electron Microscope (SEM) image illustrates the morphology of the nanocomposites are square plate-like and porous. The magnetic properties of composites were characterized by Vibrating Sample Magnetometer (VSM) show the superparamagnetic properties of all nanocomposites. Optical properties study indicated that addition of MnFe 2 O 4 to ZnO decreases the band gap. The removal of Rhodamine B (10 mg L −1 ) and wastewater of batik dye solution by ZnO-MnFe 2 O 4 (1:0.1) composite after 3 h reached 96.7% and 95.1 %.

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“…Unfortunately, the wide bandgap of ZnO is not suitable for sunlight absorption. Numerous attempts have been made to tune its bandgap from the UV to the visible range through the use of metals, non-metals, and metal oxides to improve the ZnO performance [19,20]. Owing to its cubic structure, magnetic saturation, and narrow bandgap, nickel ferrite is an important spinel ferrite suitable for this purpose.…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic degradation of coomassie blue G-250 by magnetic NiFe2O4/ZnO nanocomposite

Yeganeh¹,

Yousefi²,

Hekmati³

et al. 2020

Comptes Rendus. Chimie

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Structural and magnetic properties of ZnO–CoFe2O4 nanocomposites

Cited by 35 publications

References 26 publications

Synthesis of Zno-Nife2o4 Magnetic Nanocomposites by Simple Solvothermal Method for Photocatalytic Dye Degradation Under Solar Light

Synthesis of Zno-Nife2o4 Magnetic Nanocomposites by Simple Solvothermal Method for Photocatalytic Dye Degradation Under Solar Light

Magnetically Separable ZnO-MnFe2O4 Nanocomposites Synthesized in organic-free Media for dye Degradation Under Natural Sunlight

Photocatalytic degradation of coomassie blue G-250 by magnetic NiFe2O4/ZnO nanocomposite

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