Cu2+ doped nickel spinel ferrites (CuxNi1−xFe2O4) nanoparticles loaded on CNTs for degradation of crystal violet dye and antibacterial activity studies

Jamil, Akmal

doi:10.1080/16583655.2021.2005911

Cited by 18 publications

(6 citation statements)

References 57 publications

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“…The obtained peaks were fairly broad, which is due to the existence of small crystalline particles, variation in electron density, and point defects. The findings have validated the existence of cubic spinel structures of mixed spinel ferrites with the space group Fd 3̅ m . − The sharpness of the patterns indicates the good crystallinity of the synthesized nanostructures …”

Section: Resultssupporting

confidence: 53%

“…The calculated crystallite size of pristine NiFe 2 O 4 is 26.67 nm, which is increased to 35.36 nm after the substitution of Cu 2+ . This is likely due to the fact that the substitution of Cu 2+ in NiFe 2 O 4 caused lattice expansion . However, the introduction of SCN to Ni 0.5 Cu 0.5 Fe 2 O 4 maintained the crystallite size in the same range as 31.91 nm.…”

Section: Resultsmentioning

confidence: 99%

“…This is likely due to the fact that the substitution of Cu 2+ in NiFe 2 O 4 caused lattice expansion. 24 However, the introduction of SCN to Ni 0.5 Cu 0.5 Fe 2 O 4 maintained the crystallite size in the same range as 31.91 nm. FT-IR spectra for pure and mixed spinel ferrites anchored at the SCN nanocomposite were recorded in the range of 400− 4000 cm −1 .…”

Section: Structural Compositional and Morphological Analysesmentioning

confidence: 96%

“…The findings have validated the existence of cubic spinel structures of mixed spinel ferrites with the space group Fd3̅ m. 22−25 The sharpness of the patterns indicates the good crystallinity of the synthesized nanostructures. 24 The XRD pattern of SCN shows a peak at 27.5°belonging to the plane (002), which is attributed to the interplanar spacing between structural repeating units of the tri-s-triazine ring. When Ni 0.5 Cu 0.5 Fe 2 O 4 was treated with SCN, a broad hump near 27.5°was observed corresponding to SCN in the composite material.…”

Section: Structural Compositional and Morphological Analysesmentioning

confidence: 99%

“…In recent years, spinel ferrites have been explored as efficient photocatalysts by the researchers due to their high absorption ability, recyclability, and monodispersity, which support their exceptional ability to degrade organic pollutants. ,,− Moreover, doping or equivalent substitution of spinel ferrites with other metal ions, such as Co, Cd, and Cu, as mixed spinel ferrites is also considered an effective engineering strategy to increase the catalytic activity of the nanostructures through the formation of intimate interactions with the targeted agents. In addition, the doped spinel ferrites possess good ferromagnetic and photocatalytic properties and stability for chemicals and heat. − Based on the above mentioned strategy, we have synthesized Ni x Cu 1– x Fe 2 O 4 mixed spinel ferrite by doping NiFe 2 O 4 with Cu 2+ ions. Among the several spinel ferrites, NiFe 2 O 4 is one of the most suitable electrocatalysts for OER as well as a photocatalyst for degradation due to its rich valence states, high electrical conductivity, and narrow band gap. , …”

Section: Introductionmentioning

confidence: 99%

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Insights into the Electrocatalytic Oxygen Evolution Reaction and Photocatalytic Methylene Blue Degradation of Mixed Spinel Ni_xCu_1–xFe₂O₄ Nanocomposites Anchored at Sulfur-Doped g-C₃N₄

Sundararaj

Selvaraju

2023

J. Phys. Chem. C

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In consideration of energy conversion and/or environmental protection, it is important to develop electrocatalytic and/or photocatalytic active materials for the oxygen evolution reaction (OER) and photodegradation of methylene blue (MB), respectively. To meet these requirements, mixed spinel ferrites such as Ni x Cu1–x Fe2O4 anchored at sulfur-doped graphitic carbon nitride (SCN) nanosheets was developed for the first time via a simple one-pot hydrothermal method for the construction of a novel bifunctional Ni x Cu1–x Fe2O4@SCN nanocomposite. Initially, the crystal structure, optical properties, surface morphology, elemental composition, and surface area of different nanocomposites, such as NiFe2O4, Ni0.8Cu0.2Fe2O4, Ni0.5Cu0.5Fe2O4, Ni0.2Cu0.8Fe2O4, SCN, and Ni0.5Cu0.5Fe2O4@SCN, were studied through XRD, UV-DRS analysis, FT-IR, FE-SEM with EDX, HR-TEM, and BET analysis. Furthermore, when compared to other prepared electrode nanocomposites such as spinel ferrites or different proportion mixed spinel ferrites, the Ni0.5Cu0.5Fe2O4@SCN nanocomposite loaded 316 SSL mesh electrode demonstrated exceptional electrocatalytic oxygen evolution performance with a very low overpotential of 250 mV at 10 mA cm–2 current density and outstanding stability. Subsequently, the photocatalytic activities of the prepared mixed spinel ferrites, Ni x Cu1–x Fe2O4@SCN nanocomposites, were tested through the degradation of MB under visible-light irradiation. Among the prepared photocatalysts, Ni0.5Cu0.5Fe2O4@SCN nanocomposite showed superior photocatalytic MB degradation under visible light, which is firmly due to the equi-proportion blending of Cu+2 substitutions in mixed spinel ferrites at SCN. Accordingly, the Ni0.5Cu0.5Fe2O4@SCN nanocomposite shows excellent photocatalytic degradation (POD) efficiency of 99.1% for MB in 40 min, while other nanocomposites such as NiFe2O4, SCN, and Ni0.5Cu0.5Fe2O4 show 40.2, 42.5, and 91.2% degradation efficiencies, respectively. Thus, the Ni0.5Cu0.5Fe2O4@SCN nanocomposite could be a promising material for electrocatalytic OER and/or photocatalytic degradation of MB under visible-light irradiation.

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Section: Resultssupporting

confidence: 53%

Section: Resultsmentioning

confidence: 99%

Section: Structural Compositional and Morphological Analysesmentioning

confidence: 96%

Section: Structural Compositional and Morphological Analysesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Insights into the Electrocatalytic Oxygen Evolution Reaction and Photocatalytic Methylene Blue Degradation of Mixed Spinel Ni_xCu_1–xFe₂O₄ Nanocomposites Anchored at Sulfur-Doped g-C₃N₄

Sundararaj

Selvaraju

2023

J. Phys. Chem. C

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Impact of Co and Cu co‐doping on the Structural, Electrical, Magnetic and Solar Light Driven Photo‐Catalytic Properties of NiFe₂O₄Nano‐crystals for Crystal Violet Dye Removal

Bibi,

Jamshaid,

Iqbal

et al. 2024

ChemistrySelect

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Herein, we have synthesised cobalt (Co) and copper (Cu) co‐doped Ni‐ferrite Ni1‐xCoxFe2‐yCuyO4 nanocrystals (NCs) via the facile micro‐emulsion method. The materials were analysed for various physio‐chemical characterizations to investigate the co‐doping (Co and Cu) effects on magnetic, structural, electrical, photo‐catalytic properties. The structural analysis via Fourier Transform Infrared spectroscopy (FTIR) and X‐rays diffraction (XRD) showed the successful fabrication of Co and Cu co‐doped materials with cubic spinel geometry having a single phase, the crystallite size was observed in 15 to 24 nm range. The electrical response measured using current‐voltage (I–V) analysis showed good electrical features, the electrical resistivity declined from 6.85×107 Ohm.cm for un‐doped materials to 0.04×107 Ohm.cm for co‐doped materials, which was accredited due to the synergistic effects of Co and Cu metal cations in co‐doped Ni‐based ferrite structures. Magnetic investigation using VSM analysis showed increased saturation magnetization (Ms 31.32 to 50.75 emu/g) and coercivity (218.76 to 406.82 Oe) because of the higher magnetic responses of Co2+ions in the co‐doped spinel ferrite NCs. BET surface‐area analysis showed good porosity for co‐doped materials with an increased surface area of 52 to 104 m2/g on co‐doping. The Tauc's plot described the decline of band‐gap energies value (Egs) (1.99 eV) in co‐doped (x=y=0.56) materials as compared to (2.16 eV) of the un‐doped NiFe2O4 materials, which is due to more electrical responses of Co and Cu co‐dopant cations that possess higher energy levels, which can stabilize the charge carrier‘s species. Furthermore, the photo‐degradation using solar light showed good removal of crystal violet (CV) dye, which was almost 94.14 % by co‐doped material; however, by un‐doped material, it was 38.044 %. The scavenger experiment shows that the (OH⋅) hydroxyl radicals and (e−/h+) species play a prime role in the degradation of CV dye. Recycling and recoverability tests for five cycles’ exhibited outstanding stability of the photocatalyst with only 1.7 % losses in activity. Overall, our results showed that co‐doped Ni1‐xCoxFe2‐yCuyO4 NCs materials exhibited enhancement in the magnetic, electrical, photo‐catalytic properties and a decline in band‐gap energy values as compared to un‐doped NiFe2O4, which might have potential use in magnetic and electrical devices as well as solar‐driven photo‐catalyst materials for the remediation of environmental pollution.

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Co Doped Mg–Zn Spinel Nano-ferrites as a Sustainable Magnetic Nano-photo-catalyst with Reduced Recombination for Photo Degradation of Crystal Violet

Dhiman

Rana

Kumar

et al. 2023

J Inorg Organomet Polym

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Cu²⁺ doped nickel spinel ferrites (Cu_xNi_1−xFe₂O₄) nanoparticles loaded on CNTs for degradation of crystal violet dye and antibacterial activity studies

Cited by 18 publications

References 57 publications

Insights into the Electrocatalytic Oxygen Evolution Reaction and Photocatalytic Methylene Blue Degradation of Mixed Spinel Ni_xCu_1–xFe₂O₄ Nanocomposites Anchored at Sulfur-Doped g-C₃N₄

Insights into the Electrocatalytic Oxygen Evolution Reaction and Photocatalytic Methylene Blue Degradation of Mixed Spinel Ni_xCu_1–xFe₂O₄ Nanocomposites Anchored at Sulfur-Doped g-C₃N₄

Impact of Co and Cu co‐doping on the Structural, Electrical, Magnetic and Solar Light Driven Photo‐Catalytic Properties of NiFe₂O₄Nano‐crystals for Crystal Violet Dye Removal

Co Doped Mg–Zn Spinel Nano-ferrites as a Sustainable Magnetic Nano-photo-catalyst with Reduced Recombination for Photo Degradation of Crystal Violet

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Cu2+ doped nickel spinel ferrites (CuxNi1−xFe2O4) nanoparticles loaded on CNTs for degradation of crystal violet dye and antibacterial activity studies

Cited by 18 publications

References 57 publications

Insights into the Electrocatalytic Oxygen Evolution Reaction and Photocatalytic Methylene Blue Degradation of Mixed Spinel NixCu1–xFe2O4 Nanocomposites Anchored at Sulfur-Doped g-C3N4

Insights into the Electrocatalytic Oxygen Evolution Reaction and Photocatalytic Methylene Blue Degradation of Mixed Spinel NixCu1–xFe2O4 Nanocomposites Anchored at Sulfur-Doped g-C3N4

Impact of Co and Cu co‐doping on the Structural, Electrical, Magnetic and Solar Light Driven Photo‐Catalytic Properties of NiFe2O4Nano‐crystals for Crystal Violet Dye Removal

Co Doped Mg–Zn Spinel Nano-ferrites as a Sustainable Magnetic Nano-photo-catalyst with Reduced Recombination for Photo Degradation of Crystal Violet

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Product

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Cu²⁺ doped nickel spinel ferrites (Cu_xNi_1−xFe₂O₄) nanoparticles loaded on CNTs for degradation of crystal violet dye and antibacterial activity studies

Insights into the Electrocatalytic Oxygen Evolution Reaction and Photocatalytic Methylene Blue Degradation of Mixed Spinel Ni_xCu_1–xFe₂O₄ Nanocomposites Anchored at Sulfur-Doped g-C₃N₄

Insights into the Electrocatalytic Oxygen Evolution Reaction and Photocatalytic Methylene Blue Degradation of Mixed Spinel Ni_xCu_1–xFe₂O₄ Nanocomposites Anchored at Sulfur-Doped g-C₃N₄

Impact of Co and Cu co‐doping on the Structural, Electrical, Magnetic and Solar Light Driven Photo‐Catalytic Properties of NiFe₂O₄Nano‐crystals for Crystal Violet Dye Removal