Effect of Cobalt and Nickel Doping on Structural and Magnetic Properties of Iron Oxide Nanoparticles

Grabsi, Imen; Bouaïcha, F.; Ziouche, A.; Bouaziz, Nassima; Zaabat, Mourad; Yıldız, F.

doi:10.1007/s10904-021-02185-w

Cited by 4 publications

(4 citation statements)

References 37 publications

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“…This increase in magnetization upon doping was previously reported by Dinkar et al, in which they explained it by the existence of higher Ni 2+ concentration in tetrahedral sites . Also, Grabsi et al reported this behavior with doped samples of Co 2+ and Ni 2+ in Fe 2 O 3 . The explanation for the increase in the magnetic properties with doping of the high anisotropic metals (Ni or Co) in the Fe 2 O 3 structure is a result of the occurrence of these metal ions in interstitial sites of oxygen …”

Section: Resultssupporting

confidence: 71%

“…52 Also, Grabsi et al reported this behavior with doped samples of Co 2+ and Ni 2+ in Fe 2 O 3 . 53 The explanation for the increase in the magnetic properties with doping of the high anisotropic metals (Ni or Co) in the Fe 2 O 3 structure is a result of the occurrence of these metal ions in interstitial sites of oxygen. 54 The oxidation states and elemental compositions were assessed by X-ray photoelectron spectroscopy (XPS).…”

Section: K / Cosmentioning

confidence: 99%

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Green Synthesis of Ni/Fe₃O₄/rGO Nanocomposites for Desulfurization of Fuel

Rashid,

Raza,

Saleh

et al. 2023

ACS Appl. Nano Mater.

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The growing need for cleaner air is gaining a lot of attention, and therefore, the removal of organosulfur compounds from fuel with a concentration less than 15 ppm is becoming the need of the hour. To fulfill this expectation, we have synthesized an emergent class of magnetic hybrid nanomaterials (Fe3O4/rGO and Ni/Fe3O4/rGO) through a sol–gel-assisted green synthetic technique that shows remarkable adsorptive desulfurization of dibenzothiophene (DBT). The structural feature of the magnetic nanomaterial was identified through various characterization techniques like PXRD, FTIR, Raman, XPS, TGA, BET, SEM, and TEM. The magnetization of Ni/Fe3O4/rGO confirmed that the adsorbents performed well in magnetic separation. Further, doping with various concentrations of Ni enhances its magnetization, thereby making the recovery of nanocomposites easy, eco-friendly, and inexpensive with the help of an external magnet. In contrast to an undoped nanocomposite, Ni-doped Fe3O4/rGO exhibits superior properties. Also, Ni-doped Fe3O4/rGO shows enhanced desulfurization with an effective removal efficiency of 73% as compared with a pristine nanocomposite (45%). This is because as the doping concentration of Ni metal was increased, active Lewis acid sites were remarkably increased which were favorably available for the transfer of lone pair electrons on S atoms or π-electrons in the aromatic ring of thiophene to form strong S–Ni bonding or π-complexation. With regard to academic, industrial, and environmental considerations, Ni/Fe3O4/rGO is found to be a promising adsorbent and can be the best replacement for adsorptive desulfurization due to its relatively high adsorption capacity, improved magnetization, and simple magnetic separation efficiency.

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Section: Resultssupporting

confidence: 71%

Section: K / Cosmentioning

confidence: 99%

Green Synthesis of Ni/Fe₃O₄/rGO Nanocomposites for Desulfurization of Fuel

Rashid,

Raza,

Saleh

et al. 2023

ACS Appl. Nano Mater.

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“…The 012), ( 220), ( 104), ( 110), ( 113), ( 111), ( 024), ( 116), ( 018), ( 214), (300), and ( 119) respectively, matching the space group R3c rhombohedral cell corundum crystal structure of α-Fe2O3 NPs, which is comparable to the one described in ICDD card number 00-033-0664 (Grabsi et al 2022). The refined crystalline size (13.32 nm), interplanar spacing (2.7071 Å), lattice parameters (a=b (5.02), and c (13.62)), volume (343.26 Å 3 ), dislocation density (0.005636), strain (0.00955), Stress (0.05183), and crystallinity (0.29482), it should be noted that the complete purity phases were observed, which indicated that the α-Fe2O3 phase is pure respectively.…”

Section: Structural Studysupporting

confidence: 67%

Seed germination and phytotoxicity evaluation of Vigna radiata and Allium cepa via triple-doped green hematite nanoparticles and their photocatalytic effect

Kumar,

Thakur

2024

Preprint

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Triple transition (Ni, Cu, and Zn) doped hematite nanoparticles (α-Fe2O3 NPs) have made significant advances in biological, environmental, as well as other interdisciplinary fields of study, due to their stability and relative lack of toxicity. The α-Fe2O3 NPs has been made simple, effective, and ecologically benign by utilizing the reducing and capping capability of Azadirachta indica aqueous leaf extract. Synthesized material has been studied by XRD, UV-visible, Raman, FTIR, VSM, SEM, and TEM techniques. Doped α-Fe2O3 NPs possessed a rhombohedral phase and corundum structure that was exceptionally pure and well crystalline. The synthesized α-Fe2O3 NPs had a size of 22.83 nm and were irregular-spheroidal in shape, according to SEM and TEM examination. Synthesized NPs show ferromagnetic characteristics, according to VSM research. The photocatalytic activity of doped α-Fe2O3 NPs was evaluated by methyl orange (MO) (95%), methylene blue (MB) (97%), congo red (CR) (92%), and eosin yellowish (EY) (90%) efficiently dyes degradation, when exposed to visible light for 90–100 minutes. As a result, the NPs are suited for applications where reusability is a crucial essential feature due to the modest drop in the photocatalytic activity after four cycles. This current study examines the effects of α-Fe2O3 NPs on the seed germination of Vigna radiata (mung bean) and phytotoxicity study biomass accumulation Allium cepa (onion) through a series of germination assays. For this reason, it is crucial to manage the materials size, morphology, and magnetic properties in order to produce well-tailored photocatalysts.

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“…The dopant nickel is highly magnetic and ferromagnetic in nature. The possibility of creating ferromagnetism in nickel-based ferromagnetic semiconductors is also supported by certain theoretical research (Grabsi et al, 2022). Thus, it is obvious that Ni can have a significant impact on the magnetic characteristics of hematite NPs.…”

Section: Introductionmentioning

confidence: 86%

Degradation of malachite green dye by capping polyvinylpyrrolidone and Azadirachta indica in hematite phase of Ni doped Fe2O3 nanoparticles via co-precipitation method

Thakur

Kumar

Tapwal

et al. 2023

Nanofab

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In the present research, a chemical co-precipitation approach has been used to approach the synthesis, characterization, and photocatalytic applicability of Ni-doped α-Fe2O3 (hematite) nanoparticles. Biosynthesized iron oxide nanoparticles (IONPs) were successfully synthesized using a non-toxic leaf extract of the Azadirachta indica (AI) plant (neem) as a reducing and stabilizing agent. X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), Raman spectroscopy, FT-IR spectroscopy, ultraviolet-visible (UV-Vis) spectroscopy, and vibrating sample magnetometer (VSM) have all been used to examine the synthesized materials. All of the produced NPs contain only the nanocrystalline hematite phase, according to XRD measurements. The morphology studies of the Ni-doping hematite nanoparticles, as demonstrated by TEM and SEM. The phase purity and phonon modes of the prepared nanoparticles are confirmed by Raman spectroscopy. The UV-Vis absorption tests show also that value of the band gap increases together with the reduction in particle size, going from 2.26 eV for chemical α-Fe2O3 to 2.5 eV for green Ni-doped α-Fe2O3 nanoparticles. Additionally, it was clear from the magnetic characteristics that all of the samples behaved ferromagnetically at ambient temperatures. On the other side, malachite green (MG) dye was used as a surrogate industrial wastewater dye in order to study the photocatalytic efficiency of Ni-doped α-Fe2O3 particles. The pure/green Ni-doped α-Fe2O3 NPs showed that after 70 minutes of exposure, 92% of the MG had become discolored.

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Effect of Cobalt and Nickel Doping on Structural and Magnetic Properties of Iron Oxide Nanoparticles

Cited by 4 publications

References 37 publications

Green Synthesis of Ni/Fe₃O₄/rGO Nanocomposites for Desulfurization of Fuel

Green Synthesis of Ni/Fe₃O₄/rGO Nanocomposites for Desulfurization of Fuel

Seed germination and phytotoxicity evaluation of Vigna radiata and Allium cepa via triple-doped green hematite nanoparticles and their photocatalytic effect

Degradation of malachite green dye by capping polyvinylpyrrolidone and Azadirachta indica in hematite phase of Ni doped Fe2O3 nanoparticles via co-precipitation method

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Effect of Cobalt and Nickel Doping on Structural and Magnetic Properties of Iron Oxide Nanoparticles

Cited by 4 publications

References 37 publications

Green Synthesis of Ni/Fe3O4/rGO Nanocomposites for Desulfurization of Fuel

Green Synthesis of Ni/Fe3O4/rGO Nanocomposites for Desulfurization of Fuel

Seed germination and phytotoxicity evaluation of Vigna radiata and Allium cepa via triple-doped green hematite nanoparticles and their photocatalytic effect

Degradation of malachite green dye by capping polyvinylpyrrolidone and Azadirachta indica in hematite phase of Ni doped Fe2O3 nanoparticles via co-precipitation method

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Green Synthesis of Ni/Fe₃O₄/rGO Nanocomposites for Desulfurization of Fuel

Green Synthesis of Ni/Fe₃O₄/rGO Nanocomposites for Desulfurization of Fuel