Effect of the surface treatment on the structural, morphological, magnetic and biological properties of MFe2O4 iron spinels (M = Cu, Ni, Co, Mn and Fe)

Leal, Elvia; Dantas, Joelda; Santos, P.T.A.; Bicalho, Sheyla Maria de Castro Máximo; Kiminami, R. H. G. A.; Silva, Manoel Ribeiro da; Costa, Ana Cristina Figueiredo de Melo

doi:10.1016/j.apsusc.2018.06.025

Cited by 38 publications

(15 citation statements)

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“…So, as one of the typical nanomaterials, spinel iron oxide nanoparticles without heavy metal elements have been widely applied in many aspects of the biomedicine field due to their good biocompatibility and no toxicity or low toxicity in organisms [ 2 , 3 ], such as magnetic resonance imaging (MRI) [ 4 ], clinical diagnosis and the treatment of diseases [ 5 , 6 ], magnetic carriers for drug targeting [ 7 ], catalysis [ 8 , 9 , 10 , 11 , 12 ], immune assays [ 13 ], targeting photodynamic therapy [ 14 , 15 , 16 ], cell separation [ 17 ], DNA extraction [ 18 ], and so on. Therefore, the preparations and applications of iron oxide nanoparticles have attracted more and more researchers [ 19 , 20 ].…”

Section: Introductionmentioning

confidence: 99%

Superparamagnetic α-Fe2O3/Fe3O4 Heterogeneous Nanoparticles with Enhanced Biocompatibility

Wang

Liu

2021

Nanomaterials

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A novel type of magnetic α-Fe2O3/Fe3O4 heterogeneous nanoparticles was prepared via a facile solution combustion process with ferric nitrate and urea as raw materials, and they were characterized by XRD, SEM, TEM, and VSM techniques. The effects of the calcination temperature, the calcination time, the ratio of ferric nitrate and urea, and the heating rate on the relative content of Fe3O4 in the heterogeneous nanoparticles were investigated. The toxicity of α-Fe2O3/Fe3O4 heterogeneous nanoparticles to human hepatocytes L-02, the blood routine, and the histopathological section observation of mice were explored. The results showed that the ratio of ferric nitrate and urea was a key factor to affect the relative content of Fe3O4 in the heterogeneous nanoparticles. The calcination temperature and the calcination time had similar influences, and the corresponding calcination temperature and the calcination time were selected according to their own needs. The CCK8 results initially revealed that α-Fe2O3/Fe3O4 heterogeneous nanoparticles had no effect on cell viability when the concentration of the heterogeneous nanoparticles was less than 100 ng/mL, which suggested their excellent biocompatibility. At the same time, the tail vein administration concentration of 0.9 mg/kg had good biological safety.

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Section: Introductionmentioning

confidence: 99%

Superparamagnetic α-Fe2O3/Fe3O4 Heterogeneous Nanoparticles with Enhanced Biocompatibility

Wang

Liu

2021

Nanomaterials

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“…For example, the combustion reaction is a simple and low‐cost technique that consists of combining metallic nitrates with fuel to cause an exothermic reaction and thus produce the ceramic material with high purity and crystallinity 22 . In addition, the nanoparticles synthesized are extremely attractive for catalysis applications, mainly due to the high surface areas that make them superparamagnetic.…”

Section: Introductionmentioning

confidence: 99%

Biodiesel production on bench scale from different sources of waste oils by using NiZn magnetic heterogeneous nanocatalyst

et al. 2021

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Summary Different types of waste oils (soybean, sunflower, corn, and cottonseed) were evaluated in simultaneous esterification and transesterification reactions for more sustainable production of biodiesel by heterogeneous magnetic catalysis. The Ni0.5Zn0.5Fe2O4 magnetic nanoparticles (MNPs) were synthesized by combustion reaction on a pilot‐scale of 200 g/batch, showing obvious conditions for possible scalability for large scale production. The properties of the MNPs were investigated by X‐ray diffraction, Rietveld refinement, UV‐Vis, Brunauer, Emmett, and Teller/Barrett, Joyner, and Halenda method, granulometric distribution, pH, zeta potential, and NH3‐TPD. The results confirmed the formation of the majority phase of the inverse NiZn spinel, with median particle of 39.6 nm, and surface area of 64 m2/g with acid character. The quality measures provide the adequacy of the biodiesel obtained and the gas chromatography showed conversions from 86.65% to 98.12%. Finally, the MNPs were successfully recovered and reused in three more cycles without activity loss, and with capacity for new recycles due to its high reactivity and stability.

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“…30,31 Chitosan was one abundant biopolymer with non-toxic and biodegradable characteristics and low cost. 32 Chitosan was able to form a carbon-based product with huge specific surface area after pyrolysis at high temperature. 32,33 A previous study reported that chitosan could act as a support for immobilizing ferrocene and increasing its specific surface area.…”

Section: Introductionmentioning

confidence: 99%

“…32 Chitosan was able to form a carbon-based product with huge specific surface area after pyrolysis at high temperature. 32,33 A previous study reported that chitosan could act as a support for immobilizing ferrocene and increasing its specific surface area. 34 The physicochemical characteristics of the synthesized composite were studied.…”

Section: Introductionmentioning

confidence: 99%

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Efficient degradation of Acid Orange 7 by persulfate activated with a novel developed carbon‐based MnFe₂O₄ composite catalyst

Liu

et al. 2019

J of Chemical Tech & Biotech

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BACKGROUND A novel carbon‐based modified MnFe2O4 catalyst was first developed to produce sulfate radicals (SO4−•) by activation of persulfate (PS). The catalyst was fabricated with a mixture of MnFe2O4 nanoparticles and chitosan (which could form a large amount of carbon‐based biomass after pyrolysis) annealed at 600 °C and was referred to as CM‐600. RESULTS The microstructure of the composite catalyst CM‐600 showed that MnFe2O4 was supported on the surface of carbon‐based sheets. After modification by pyrolysis, the specific surface area of MnFe2O4 enlarged significantly and thus the contact area between catalyst and PS increased. X‐ray diffraction, Fourier transform infrared spectroscopy, Raman spectroscopy and X‐ray photoelectron spectroscopy were used to characterize the components of CM‐600. In comparison with the MnFe2O4/PS system, the activation of PS by CM‐600 was enhanced prominently, while 99.0% Acid Orange 7 (AO7) removal was achieved after reacting for 30 min. Investigations of influencing factors indicated the optimal treatment parameters. The two reactive species in the degradation process, namely free radicals (SO4−• and hydroxyl radicals (•OH)) and non‐radicals (singlet oxygen, 1O2), were confirmed by quenching tests and electron spin resonance spectroscopy. The corresponding degradation mechanism was proposed and SO4−• was generated primarily via the activation of PS by MnII and FeII. CONCLUSION The research demonstrated that the composite catalyst CM‐600 improved the property of MnFe2O4 for catalyzing PS and thus enlarged the practical application of SO4−• oxidation technology in pollutant degradation in aqueous environments. © 2019 Society of Chemical Industry

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Effect of the surface treatment on the structural, morphological, magnetic and biological properties of MFe2O4 iron spinels (M = Cu, Ni, Co, Mn and Fe)

Cited by 38 publications

References 64 publications

Superparamagnetic α-Fe2O3/Fe3O4 Heterogeneous Nanoparticles with Enhanced Biocompatibility

Superparamagnetic α-Fe2O3/Fe3O4 Heterogeneous Nanoparticles with Enhanced Biocompatibility

Biodiesel production on bench scale from different sources of waste oils by using NiZn magnetic heterogeneous nanocatalyst

Efficient degradation of Acid Orange 7 by persulfate activated with a novel developed carbon‐based MnFe₂O₄ composite catalyst

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Effect of the surface treatment on the structural, morphological, magnetic and biological properties of MFe2O4 iron spinels (M = Cu, Ni, Co, Mn and Fe)

Cited by 38 publications

References 64 publications

Superparamagnetic α-Fe2O3/Fe3O4 Heterogeneous Nanoparticles with Enhanced Biocompatibility

Superparamagnetic α-Fe2O3/Fe3O4 Heterogeneous Nanoparticles with Enhanced Biocompatibility

Biodiesel production on bench scale from different sources of waste oils by using NiZn magnetic heterogeneous nanocatalyst

Efficient degradation of Acid Orange 7 by persulfate activated with a novel developed carbon‐based MnFe2O4 composite catalyst

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Product

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Effect of the surface treatment on the structural, morphological, magnetic and biological properties of MFe2O4 iron spinels (M = Cu, Ni, Co, Mn and Fe)

Efficient degradation of Acid Orange 7 by persulfate activated with a novel developed carbon‐based MnFe₂O₄ composite catalyst