Magnetically separable copper substituted cobalt–zinc nano-ferrite photocatalyst with enhanced photocatalytic activity

Bhukal, Santosh; Shivali,; Singhal, Sonal

doi:10.1016/j.mssp.2014.05.023

Cited by 42 publications

(9 citation statements)

References 27 publications

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“…The catalytic activity of the ferrites is also due to metal ions in the octahedral sites. The high activity of CuFe 2 O 4 can be correlated to the tendency of Cu 2+ to occupy the octahedral site, 48 which enables easy electron exchange between the variable oxidation states of Cu.…”

Section: Mechanism Of Photodegradationmentioning

confidence: 99%

Tailoring the photo-Fenton activity of spinel ferrites (MFe₂O₄) by incorporating different cations (M = Cu, Zn, Ni and Co) in the structure

Bansal²,

2015

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Magnetic bimetallic nanospinels (MFe 2 O 4 ; M=Cu, Zn, Ni and Co) of size ranging between 15-30 nm were synthesized by facile and viable sol-gel method. The analysis of Fourier Transform Infrared Spectra of all the samples demonstrated formation of M-O bond in spinel structure. Structural exploration of all the nano materials using Powder X-Ray Diffraction and High Resolution Transmission Electron Microscopy revealed formation of single phase cubic spinel structure. All the materials exhibited magnetic temperament with high surface area (92-151 m 2 /g). Furthermore, band gap calculated from diffuse reflectance spectra was quite narrow (1.26-2.08eV) for all the samples, hence ferrites could act as visible light driven photocatalyst.The prepared nanospinels were proposed to be promising heterogeneous photo-Fenton catalyst under visible light for the degradation of organic pollutants. The catalytic results revealed that rate of reaction was significantly influenced by the cation in the spinel structure as degradation order was observed to be CuFe 2 O 4 (k=0.286 min -1 ) >ZnFe 2 O 4 (k=0.267 min -1 ) > NiFe 2 O 4 (k=0.138 min -1 ) > CoFe 2 O 4 (k=0.078 min -1 ). The reaction conditions were optimized for all the ferrites as the photodegradation was influenced by ferrite dosage (0.25-1.00 g/L), pH (2)(3)(4)(5) and H 2 O 2 concentration (4-27 mM). The experimental data disclosed that activity of ferrite was sensitive to sintering temperature. The materials displayed remarkable stability in the reaction as it could be magnetically separated using external magnet and recycled up to 4 consecutive cycles. There was no significant loss in activity of all the material demonstrating an excellent ability of ferrites to remove organic pollutants from wastewater.

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Section: Mechanism Of Photodegradationmentioning

confidence: 99%

Tailoring the photo-Fenton activity of spinel ferrites (MFe₂O₄) by incorporating different cations (M = Cu, Zn, Ni and Co) in the structure

Bansal²,

2015

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“…Ferrites behave like insulators at room temperature and are semiconductors at a higher temperature. The electrical and magnetic properties of zinc ferrites can be improved through partial insertion of divalent ions like Cu, Co, Ni, Mn and Mg. Santosh Bhukalet et al reported the copper-doped CoZn ferrites prepared by sol–gel auto combustion technique and found that all nanomaterials have semiconducting nature [ 1 ]. K. Anu et al synthesized Zn-doped cobalt ferrites by applying a two-step process and investigated the variations in electrical and magnetic properties [ 2 ].…”

Section: Introductionmentioning

confidence: 99%

Structural, Optical and Electrical Properties of Cu0.6CoxZn0.4−xFe2O4 (x = 0.0, 0.1, 0.2, 0.3, 0.4) Soft Ferrites

et al. 2021

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A series of cobalt-inserted copper zinc ferrites, Cu0.6CoxZn0.4−xFe2O4 (x = 0.0, 0.1, 0.2, 0.3, 0.4) having cubic spinel structure were prepared by the coprecipitation method. Various characterization techniques, including XRD, FTIR, UV-vis and I–V were used to investigate structural optical and electrical properties, respectively. The lattice constant was observed to be decreased as smaller ionic radii Co2+ (0.74 Å) replaced the higher ionic radii Zn2+ (0.82 Å). The presence of tetrahedral and octahedral bands was confirmed by FTIR spectra. Optical bandgap energy was determined in the range of 4.44–2.05 eV for x = 0.0 to 0.4 nanoferrites, respectively. DC electrical resistivity was measured and showed an increasing trend (5.42 × 108 to 6.48 × 108 Ω·cm) with the addition of cobalt contents as cobalt is more conductive than zinc. The range of DC electrical resistivity (108 ohm-cm) makes these nanomaterials potential candidates for telecommunication devices.

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“…[11][12][13] Ferrites have the added advantages of high activity, good light absorption, easy mass transfer, facile synthetic procedure and facile recovery using an external magnet due to their inherent magnetic nature. [14][15][16][17] Among the various ferrites, NiFe 2 O 4 has attracted noticeable attention due to its excellent magnetic and catalytic properties. Many researchers have reported the use of NiFe 2 O 4 nanoparticles synthesized by different methodologies for the degradation of organic pollutants.…”

Section: Introductionmentioning

confidence: 99%

Designing different morphologies of NiFe₂O₄ for tuning of structural, optical and magnetic properties for catalytic advancements

Dhiman

Kumar²,

Singhal

2016

New J. Chem.

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Magnetically separable copper substituted cobalt–zinc nano-ferrite photocatalyst with enhanced photocatalytic activity

Cited by 42 publications

References 27 publications

Tailoring the photo-Fenton activity of spinel ferrites (MFe₂O₄) by incorporating different cations (M = Cu, Zn, Ni and Co) in the structure

Tailoring the photo-Fenton activity of spinel ferrites (MFe₂O₄) by incorporating different cations (M = Cu, Zn, Ni and Co) in the structure

Structural, Optical and Electrical Properties of Cu0.6CoxZn0.4−xFe2O4 (x = 0.0, 0.1, 0.2, 0.3, 0.4) Soft Ferrites

Designing different morphologies of NiFe₂O₄ for tuning of structural, optical and magnetic properties for catalytic advancements

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Magnetically separable copper substituted cobalt–zinc nano-ferrite photocatalyst with enhanced photocatalytic activity

Cited by 42 publications

References 27 publications

Tailoring the photo-Fenton activity of spinel ferrites (MFe2O4) by incorporating different cations (M = Cu, Zn, Ni and Co) in the structure

Tailoring the photo-Fenton activity of spinel ferrites (MFe2O4) by incorporating different cations (M = Cu, Zn, Ni and Co) in the structure

Structural, Optical and Electrical Properties of Cu0.6CoxZn0.4−xFe2O4 (x = 0.0, 0.1, 0.2, 0.3, 0.4) Soft Ferrites

Designing different morphologies of NiFe2O4 for tuning of structural, optical and magnetic properties for catalytic advancements

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Tailoring the photo-Fenton activity of spinel ferrites (MFe₂O₄) by incorporating different cations (M = Cu, Zn, Ni and Co) in the structure

Tailoring the photo-Fenton activity of spinel ferrites (MFe₂O₄) by incorporating different cations (M = Cu, Zn, Ni and Co) in the structure

Designing different morphologies of NiFe₂O₄ for tuning of structural, optical and magnetic properties for catalytic advancements