High Yield Synthesis and Application of Magnetite Nanoparticles (Fe3O4)

Wroblewski, Charles; Volford, Tunde; Martos, Blake; Samoluk, Jurek; Martos, Perry

doi:10.3390/magnetochemistry6020022

Cited by 16 publications

(6 citation statements)

References 38 publications

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“…The variation in base concentration may yield nanoparticles with ferromagnetic addition rather than superparamagnetic. High yield synthesis of MNPs of up to 99% are possible as recently displayed by Wroblewski et al [57]. The team managed to successfully show how to synthesize MNPs with 12.9 nm in average particle size that emits a saturation magnetization value of 74 emug −1 .…”

Section: Co-precipitation Methodsmentioning

confidence: 88%

Magnetite (Fe3O4) Nanoparticles in Biomedical Application: From Synthesis to Surface Functionalisation

et al. 2020

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Nanotechnology has gained much attention for its potential application in medical science. Iron oxide nanoparticles have demonstrated a promising effect in various biomedical applications. In particular, magnetite (Fe3O4) nanoparticles are widely applied due to their biocompatibility, high magnetic susceptibility, chemical stability, innocuousness, high saturation magnetisation, and inexpensiveness. Magnetite (Fe3O4) exhibits superparamagnetism as its size shrinks in the single-domain region to around 20 nm, which is an essential property for use in biomedical applications. In this review, the application of magnetite nanoparticles (MNPs) in the biomedical field based on different synthesis approaches and various surface functionalisation materials was discussed. Firstly, a brief introduction on the MNP properties, such as physical, thermal, magnetic, and optical properties, is provided. Considering that the surface chemistry of MNPs plays an important role in the practical implementation of in vitro and in vivo applications, this review then focuses on several predominant synthesis methods and variations in the synthesis parameters of MNPs. The encapsulation of MNPs with organic and inorganic materials is also discussed. Finally, the most common in vivo and in vitro applications in the biomedical world are elucidated. This review aims to deliver concise information to new researchers in this field, guide them in selecting appropriate synthesis techniques for MNPs, and to enhance the surface chemistry of MNPs for their interests.

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Section: Co-precipitation Methodsmentioning

confidence: 88%

Magnetite (Fe3O4) Nanoparticles in Biomedical Application: From Synthesis to Surface Functionalisation

et al. 2020

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“…The Pd‐PVP/MNPs 0.7 M catalyst demonstrated nearly the same (M S = 51.2 emu g −1 , M r = 5.4 emu g −1 , H C = 71 Oe) magnetic properties (Figure 2, curve 2 ). The magnetization of the catalysts was lower than that of 11–13 nm magnetite nanoparticles (M S = 71–75 emu g −1 ), 28,29 and was not far from the value (M S = 45–47 emu g −1 ) of the γ‐Fe 2 O 3 nanoparticles of 10–14 nm in size 30,31 . The M r and H C values showed that both materials exhibit weak ferromagnetic and soft magnetic behaviors, 32 apparently due to an agglomeration of magnetic nanoparticles 26 …”

Section: Resultsmentioning

confidence: 89%

Behavior of Pd‐supported catalysts in phenylacetylene hydrogenation: Effect of combined use of polyvinylpyrrolidone and NaOH for magnetic support modification

Жармагамбетова¹,

Talgatov²,

Auyezkhanova³

et al. 2021

Polymers for Advanced Techs

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Recently, magnetic nanoparticles have attracted the attention as catalyst supports due to the possibility of magnetic separation, allowing for easy, fast, and clean recovery of the catalysts. A synthesis strategy of such supports plays an important role in improving the properties of the magnetic catalysts. Here, we proposed a simple and effective method to increase the activity and lifetime of the Pd magnetic catalyst. Polyvinylpyrrolidone‐maghemite nanoparticles were synthesized via one‐pot coprecipitation method using an excess of the NaOH. This was followed by adsorption of Pd2+ on the magnetic nanoparticles. The resulting catalyst showed activity (WCC = 4.0 × 10−6 mol s−1, WCC = 12.7 × 10−6 mol s−1) and selectivity (94%) in phenylacetylene hydrogenation. The catalyst was then magnetically recovered and reused 58 times. The activity of the catalyst increased significantly during the first three runs, changing the rate ratio of WCC to WCC from 1:3.2 to 1:1.6, and then decreased in the following runs. To understand the reason for this behavior, the catalyst was characterized, as well as catalytic studies were performed using similar catalysts for comparison. The results show that the NaOH adsorbed on magnetic support affects the size, stability, and catalytic properties of the Pd particles, and the effect of alkali is enhanced in the presence of the polymer.

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“…The main relative intensities and position of all diffraction peaks at 30.10°, 35.43°, 42.99°, 53.66°, 57.29°, 62.67°, 67.62°, and 75.80° (2θ degree) with the planes of (220), (311), (400), ( 422), ( 511), ( 440), (531), and (622), respectively, are in agreement with the standard pattern for JCPDS Card No. (19-0629) indexed magnetite (Fe3O4) phase with an inverse spinel structure [36][37][38][39][40]. In the (311) plane, the synthesised MNPs illustrate very broad peaks that indicate low crystallinity.…”

Section: Resultsmentioning

confidence: 99%

Molarity Effects of Fe and NaOH on Synthesis and Characterisation of Magnetite (Fe3O4) Nanoparticles for Potential Application in Magnetic Hyperthermia Therapy

et al. 2022

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In this study, the effect of molarity on the structural, magnetic, and heat dissipation properties of magnetite nanoparticles (MNPs) was investigated to optimise the parameters for potential application in magnetic hyperthermia therapy (MHT). MHT works based on the principle of local temperature rise at the tumour site by magnetic iron oxide nanoparticles (MIONPs) with the application of an alternating magnetic field. MHT is a safe method for cancer treatment and has minimal or no side effects. Magnetite (Fe3O4) is the best material among MIONPs to be applied in local MHT due to its biocompatibility and high saturation magnetisation value. MNPs were prepared by co-precipitation at varying molarity. Structural characterisation was performed via X-ray powder diffraction (XRD) for crystalline structure analysis and field-emission scanning electron microscopy (FESEM) for morphology and particle size analysis. Measurement of the magnetic properties of the as-synthesised MNPs was carried out using a vibrating sample magnetometer (VSM). Power loss (P) was determined theoretically. The increase in molarity resulted in significant effects on the structural, magnetic, and heat dissipation properties of MNPs. The particle size and saturation magnetisation (Ms) decreased with the gradual addition of base but increased, together with crystallinity, with the gradual addition of iron source. M3 recorded the smallest crystalline size at 3.559 nm. The sample with the highest molarity (M4) displayed the highest heat generation capacity with a p value of up to 0.4056 W/g. High p values at the nano-scale are crucial, especially in local MHT, for effective heat generation, thus proving the importance of molarity as a vital parameter during MNP synthesis.

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High Yield Synthesis and Application of Magnetite Nanoparticles (Fe3O4)

Cited by 16 publications

References 38 publications

Magnetite (Fe3O4) Nanoparticles in Biomedical Application: From Synthesis to Surface Functionalisation

Magnetite (Fe3O4) Nanoparticles in Biomedical Application: From Synthesis to Surface Functionalisation

Behavior of Pd‐supported catalysts in phenylacetylene hydrogenation: Effect of combined use of polyvinylpyrrolidone and NaOH for magnetic support modification

Molarity Effects of Fe and NaOH on Synthesis and Characterisation of Magnetite (Fe3O4) Nanoparticles for Potential Application in Magnetic Hyperthermia Therapy

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