The effect of basic pH on the elaboration of ZnFe2O4 nanoparticles by co-precipitation method: Structural, magnetic and hyperthermia characterization

Kerroum, Mohamed Alae Ait; Essyed, A.; Iacoviță, Cristian; Baaziz, Walid; Ihiawakrim, Dris; Mounkachi, O.; Hamedoun, M.; Benyoussef, A.; Benaı̈ssa, M.; Ersen, Ovidiu

doi:10.1016/j.jmmm.2019.01.081

Cited by 68 publications

(41 citation statements)

References 30 publications

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“…The SAR values of the nanofluid samples exposed to different AMF strengths are provided in Table 2 . The SAR values increased considerably with increasing AMF strengths from 23.60 kA.m −1 to 39.37 kA.m −1 due to the heating loss mechanisms, 60 which is also in line with previous research reports such as bare superparamagnetic Fe 3 O 4 44 and polycaprolactone-coated Fe 3 O 4 45 and γ-Fe 2 O 3. 42 The SAR values reduced remarkably with increasing the extract concentrations from ‎0 to 10 wt.%, which might be ascribed to the non-magnetic nature, which acted as a heating barrier for the Fe 3 O 4 NPs.…”

Section: Resultssupporting

confidence: 91%

Green Synthesis of Fe3O4 Nanoparticles Stabilized by a Garcinia mangostana Fruit Peel Extract for Hyperthermia and Anticancer Activities

Yusefi¹,

Shameli²,

Yee³

et al. 2021

IJN

109

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Introduction: Fe 3 O 4 nanoparticles (Fe 3 O 4 NPs) with multiple functionalities are intriguing candidates for various biomedical applications. Materials and Methods: This study introduced a simple and green synthesis of Fe 3 O 4 NPs using a low-cost stabilizer of plant waste extract rich in polyphenols content with a well-known antioxidant property as well as anticancer ability to eliminate colon cancer cells. Herein, Fe 3 O 4 NPs were fabricated via a facile co-precipitation method using the crude extract of Garcinia mangostana fruit peel as a green stabilizer at different weight percentages (1, 2, 5, and 10 wt.%). The samples were analyzed for magnetic hyperthermia and then in vitro cytotoxicity assay was performed. Results: The XRD planes of the samples were corresponding to the standard magnetite Fe 3 O 4 with high crystallinity. From TEM analysis, the green synthesized NPs were spherical with an average size of 13.42±1.58 nm and displayed diffraction rings of the Fe 3 O 4 phase, which was in good agreement with the obtained XRD results. FESEM images showed that the extract covered the surface of the Fe 3 O 4 NPs well. The magnetization values for the magnetite samples were ranging from 49.80 emu/g to 69.42 emu/g. FTIR analysis verified the functional groups of the extract compounds and their interactions with the NPs. Based on DLS results, the hydrodynamic sizes of the Fe 3 O 4 nanofluids were below 177 nm. Furthermore, the nanofluids indicated the zeta potential values up to −34.92±1.26 mV and remained stable during four weeks of storage, showing that the extract favorably improved the colloidal stability of the Fe 3 O 4 NPs. In the hyperthermia experiment, the magnetic nanofluids showed the acceptable specific absorption rate (SAR) values and thermosensitive performances under exposure of various alternating magnetic fields. From results of in vitro cytotoxicity assay, the killing effects of the synthesized samples against HCT116 colon cancer cells were mostly higher compared to those against CCD112 colon normal cells. Remarkably, the Fe 3 O 4 NPs containing 10 wt.% of the extract showed a lower IC 50 value (99.80 µg/mL) in HCT116 colon cancer cell line than in CCD112 colon normal cell line (140.80 µg/mL). Discussion: This research, therefore, introduced a new stabilizer of Garcinia mangostana fruit peel extract for the biosynthesis of Fe 3 O 4 NPs with desirable physiochemical properties for potential magnetic hyperthermia and colon cancer treatment.

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Section: Resultssupporting

confidence: 91%

Green Synthesis of Fe3O4 Nanoparticles Stabilized by a Garcinia mangostana Fruit Peel Extract for Hyperthermia and Anticancer Activities

Yusefi¹,

Shameli²,

Yee³

et al. 2021

IJN

109

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“…The conventional co-precipitation synthetic route was applied for the preparation of MNPs, following a similar protocol as described in our previous work [ 72 ]. Briefly, 30 mL aqueous solutions of iron and zinc chlorides were prepared separately and stirred for 10 min.…”

Section: Methodsmentioning

confidence: 99%

Quantitative Analysis of the Specific Absorption Rate Dependence on the Magnetic Field Strength in ZnxFe3−xO4 Nanoparticles

Kerroum

Iacoviță

Baaziz

et al. 2020

IJMS

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Superparamagnetic ZnxFe3−xO4 magnetic nanoparticles (0 ≤ x < 0.5) with spherical shapes of 16 nm average diameter and different zinc doping level have been successfully synthesized by co-precipitation method. The homogeneous zinc substitution of iron cations into the magnetite crystalline structure has led to an increase in the saturation magnetization of nanoparticles up to 120 Am2/kg for x ~ 0.3. The specific absorption rate (SAR) values increased considerably when x is varied between 0 and 0.3 and then decreased for x ~ 0.5. The SAR values are reduced upon the immobilization of the nanoparticles in a solid matrix being significantly increased by a pre-alignment step in a uniform static magnetic field before immobilization. The SAR values displayed a quadratic dependence on the alternating magnetic field amplitude (H) up to 35 kA/m. Above this value, a clear saturation effect of SAR was observed that was successfully described qualitatively and quantitatively by considering the non-linear field’s effects and the magnetic field dependence of both Brown and Neel relaxation times. The Neel relaxation time depends more steeply on H as compared with the Brown relaxation time, and the magnetization relaxation might be dominated by the Neel mechanism, even for nanoparticles with large diameter.

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“…The unit cell must compress when ions are replaced by smaller ionic radius ones. 42 As such, with increasing occupancy of Fe 3+ in A and B sites, the lattice parameter decreases since the ionic radius of Fe 3+ (0.67 Å) is smaller than that of both Zn 2+ (0.83 Å) and Cu 2+ (0.76 Å). On the other hand, an increase of the lattice parameters with the increase of pH from 8 to 12 suggests that the normal degree of the spinel structure becomes remarkable when the synthesis is performed in a strong basic medium.…”

Section: Resultsmentioning

confidence: 95%

Developed Process Circuit Flowsheet of Al Amar Ore for Production of Nanocrystalline Ferrite and Improving Gold Recovery

et al. 2020

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Amar gold ore is rich in sulfides of base metals and is commercially applied for the production of copper concentrate via floatation and gold bullion by cyanidation of tailing. The current process flowsheet suffers from low gold recovery (∼60%) and loss of metals in the hazardous stockpiled residue. This work addresses these drawbacks by a newly experimental redesign of the process circuit. The innovative flowsheet comprises a sequence of operations, including acid leaching of the roasted ore, gold recovery from the leach residue, and preparation of a valuable zinc−copper−lead ferrite from the filtrate by coprecipitation followed by heat treatment. The ore is roasted at 650 °C and then leached in 20% HCl, where most of Zn, Cu, Pb, and Fe contents are dissolved, while pristine gold remains in the residue. Most of the gold (∼93%) can be recovered by cyanidation of the acid leach residue. Stoichiometric ratios of dissolved Zn, Cu, Pb, and Fe in the acid leach solution can be kept at 0.6:0.3:0.1:2.0, respectively, only by adding a small amount of ferric chloride. These metals are coprecipitated at varying pH values from 8 to 10, and the produced powders are annealed at temperatures from 600 to 1100 °C. X-ray diffraction (XRD) charts reveal sharp peaks of the targeted Zn 0.6 Cu 0.3 Pb 0.1 Fe 2 O 4 phase at 600 °C, while a highly crystalline single phase is obtained at 1100 °C, independently of precipitation pH. The crystalline size of the produced powders increases with annealing temperatures (from 18−27 nm at 600 °C to 85−105 nm at 1100 °C). The finest size is found at pH 12. Scanning electron microscopy (SEM) investigation shows uniform cubic microstructures of samples annealed at 1100 °C. The produced ferrite powders exhibit soft magnetic characteristics. Saturation magnetization, M s , substantially increases with pH. Coercivity, H c, increases with increasing annealing temperatures, from 600 to 800 °C, and decreases above 800 °C. Preliminary cost−benefit analysis revealed that the profit margin of the proposed process flowsheet is promising. The wastewater is almost free of heavy metals. Our advances in high gold recovery and preparation of valuable magnetic nanocrystalline ferrite provide exciting opportunities to enhance and maximize Al Amar ore production for practical applications.

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The effect of basic pH on the elaboration of ZnFe2O4 nanoparticles by co-precipitation method: Structural, magnetic and hyperthermia characterization

Cited by 68 publications

References 30 publications

Green Synthesis of Fe3O4 Nanoparticles Stabilized by a Garcinia mangostana Fruit Peel Extract for Hyperthermia and Anticancer Activities

Green Synthesis of Fe3O4 Nanoparticles Stabilized by a Garcinia mangostana Fruit Peel Extract for Hyperthermia and Anticancer Activities

Quantitative Analysis of the Specific Absorption Rate Dependence on the Magnetic Field Strength in ZnxFe3−xO4 Nanoparticles

Developed Process Circuit Flowsheet of Al Amar Ore for Production of Nanocrystalline Ferrite and Improving Gold Recovery

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