The impact of carbon nanotubes on the optical, electrical, and magnetic parameters of Ni2+ and Co2+ based spinel ferrites

Iftikhar, Samrah; Warsi, Muhammad Farooq; Haider, Sajjad; Musaddiq, Sara; Shakir, Imran; Shahid, Muhammad

doi:10.1016/j.ceramint.2019.07.092

Cited by 47 publications

(16 citation statements)

References 84 publications

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“…The major peak corresponding to the plane (002) at 2θ position of 26.20 is the characteristic peak of MWCNTs and f-MWCNTs. [40] The peaks centered at 30.04 , 35.53 , 39.16 , 42.89 , 52.22 , 58.32 and 63.04 which were accredited to the presence of (220), (311), (222), (400), (422), (511) and (440) crystal planes of NiFe 2 O 4 inverse spinel respectively. These cores can be clearly indexed to the standard inverse spinel (NiFe 2 O 4 MNPs) with a facecentered cubic (fcc) structure, according to the standard JCPDS card no.…”

Section: Characterization Of Nanocatalysts 231 | Pxrd Analysesmentioning

confidence: 99%

“…[42][43][44] The peaks centered at 26 and 50 corresponding to planes (002) and (003) represent the CNTs fingerprints. [40,44] The presence of the peak to 26.20 (which corresponds to MWCNTs material) on the PXRD pattern of the NiFe 2 O 4 -CNTs composite, indicates the successful formation of the respective hybrid material. The sharpness and broad hump of the peaks exhibited the crystalline and amphorous nature of the MWCNTs and its decorating with nickel-ferrite nanoparticles, respectively.…”

Section: Characterization Of Nanocatalysts 231 | Pxrd Analysesmentioning

confidence: 99%

“…54-0964. [40][41][42] The most intense PXRD peak is at 2θ = 35.53 and has plane spacing of d = 2.494 Å corresponding to the plane (311) is characteristic of cubic spinel ferrite. This authenticated the pattern of single-phase face-centered cubic spinel structure without the extra peaks of the other crystallographic phase.…”

Section: Characterization Of Nanocatalysts 231 | Pxrd Analysesmentioning

confidence: 99%

“…These analyses also divulged the structural constitution and changes in vibrational frequencies due to the exchange of cations between tetrahedral and octahedral sites. [40] The broad band around 3400 to 3200 cm −1 can be endorsed to the O H stretching vibration of carboxyl functional groups created on their surface. The bands at 2981 and 2891 cm −1 are ascribed to the stretching vibration of the C H group.…”

Section: Ft-ir Spectroscopymentioning

confidence: 99%

“…[42,45] Furthermore, the functional groups present in MWCNTs, f-MWCNTs, nickel-ferrite MNPs, and NiFe 2 O 4 -CNTs, with their respective wave number values were displayed in Table 5. [40]…”

Section: Ft-ir Spectroscopymentioning

confidence: 99%

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Multiwalled carbon nanotubes crowned with nickel‐ferrite magnetic nanoparticles assisted heterogeneous catalytic strategy for the synthesis of benzo[d]imidazo[2,1‐b]thiazole scaffolds

Geedkar

Kumar

Sharma

2020

Journal of Heterocyclic Chem

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Present manuscript elicits an account of the sonication promoted multicomponent reactions strategy assisted by multiwalled carbon nanotubes embraced with nickel-ferrite (NiFe 2 O 4-CNTs) magnetic nanoparticles, as a heterogeneous catalyst to synthesize a novel series of pharmacologically active benzo[d]imidazo[2,1-b]thiazole scaffolds. The synthesis of these biologically active derivatives was achieved via. A 3 coupling involving 2-aminoben zothiazole, pertinent aryl aldehydes and phenyl acetylene derivatives, proceeded in PEG 400 as green solvent under aerobic conditions to afford the products in good to excellent yields. The higher environmental compatibility and sustainability factors such as higher ecoscale score, smaller E-factor and appreciable atom economy put this etiquette under the parasol of green chemistry precepts. The characterization of synthesized catalysts was attained through varied techniques viz. powder X-ray diffraction, field emission scanning electron microscopy with energy-dispersive X-ray spectroscopy, Raman, FT-IR, VSM and TGA-DTA-DTG analyses, dispersion studies, and nitrogen porosimetry analyses. The structures of the synthesized compounds were also endorsed by extensive spectroscopic studies (FT-IR, 1 H and 13 C NMR, Mass) and elemental analyses.

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Section: Characterization Of Nanocatalysts 231 | Pxrd Analysesmentioning

confidence: 99%

Section: Characterization Of Nanocatalysts 231 | Pxrd Analysesmentioning

confidence: 99%

Section: Characterization Of Nanocatalysts 231 | Pxrd Analysesmentioning

confidence: 99%

Section: Ft-ir Spectroscopymentioning

confidence: 99%

“…[42,45] Furthermore, the functional groups present in MWCNTs, f-MWCNTs, nickel-ferrite MNPs, and NiFe 2 O 4 -CNTs, with their respective wave number values were displayed in Table 5. [40]…”

Section: Ft-ir Spectroscopymentioning

confidence: 99%

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Multiwalled carbon nanotubes crowned with nickel‐ferrite magnetic nanoparticles assisted heterogeneous catalytic strategy for the synthesis of benzo[d]imidazo[2,1‐b]thiazole scaffolds

Geedkar

Kumar

Sharma

2020

Journal of Heterocyclic Chem

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Impact of Co and Cu co‐doping on the Structural, Electrical, Magnetic and Solar Light Driven Photo‐Catalytic Properties of NiFe₂O₄ Nano‐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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Magnetically targeted delivery of Quercetin-loaded Ca1–xMnxFe2O4 nanocarriers: synthesis, characterization and in vitro study on HEK 293-T and MCF-7 cell lines

et al. 2022

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The impact of carbon nanotubes on the optical, electrical, and magnetic parameters of Ni2+ and Co2+ based spinel ferrites

Cited by 47 publications

References 84 publications

Multiwalled carbon nanotubes crowned with nickel‐ferrite magnetic nanoparticles assisted heterogeneous catalytic strategy for the synthesis of benzo[d]imidazo[2,1‐b]thiazole scaffolds

Multiwalled carbon nanotubes crowned with nickel‐ferrite magnetic nanoparticles assisted heterogeneous catalytic strategy for the synthesis of benzo[d]imidazo[2,1‐b]thiazole scaffolds

Impact of Co and Cu co‐doping on the Structural, Electrical, Magnetic and Solar Light Driven Photo‐Catalytic Properties of NiFe₂O₄ Nano‐crystals for Crystal Violet Dye Removal

Magnetically targeted delivery of Quercetin-loaded Ca1–xMnxFe2O4 nanocarriers: synthesis, characterization and in vitro study on HEK 293-T and MCF-7 cell lines

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The impact of carbon nanotubes on the optical, electrical, and magnetic parameters of Ni2+ and Co2+ based spinel ferrites

Cited by 47 publications

References 84 publications

Multiwalled carbon nanotubes crowned with nickel‐ferrite magnetic nanoparticles assisted heterogeneous catalytic strategy for the synthesis of benzo[d]imidazo[2,1‐b]thiazole scaffolds

Multiwalled carbon nanotubes crowned with nickel‐ferrite magnetic nanoparticles assisted heterogeneous catalytic strategy for the synthesis of benzo[d]imidazo[2,1‐b]thiazole scaffolds

Impact of Co and Cu co‐doping on the Structural, Electrical, Magnetic and Solar Light Driven Photo‐Catalytic Properties of NiFe2O4 Nano‐crystals for Crystal Violet Dye Removal

Magnetically targeted delivery of Quercetin-loaded Ca1–xMnxFe2O4 nanocarriers: synthesis, characterization and in vitro study on HEK 293-T and MCF-7 cell lines

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Product

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Impact of Co and Cu co‐doping on the Structural, Electrical, Magnetic and Solar Light Driven Photo‐Catalytic Properties of NiFe₂O₄ Nano‐crystals for Crystal Violet Dye Removal