Novel complex-coprecipitation route to form high quality triethanolamine-coated Fe3O4 nanocrystals: Their high saturation magnetizations and excellent water treatment properties

Xia, Tian; Wang, Jingping; Wu, Chunli; Meng, Fuchang; Shi, Zhan; Lian, Jie; Feng, Jing; Meng, Jian

doi:10.1039/c2ce25813g

Cited by 50 publications

(33 citation statements)

References 45 publications

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“…Since the reaction is carried out at 100 ºC, the Fealkanolamine complexes hydrolyze to the corresponding intermediate iron hydroxide species which are then converted into the final iron oxides. 46 On the other hand, since DEA only contains two hydroxyl groups instead of three, the stability enhancement of the corresponding Fe-DEA complexes 34 will be smaller, leading to a weaker coordination and thus explaining the larger size of Fe_DEA nanoparticles. When comparing both ethanolamines (DEA vs.…”

Section: Figurementioning

confidence: 99%

Architectured design of superparamagnetic Fe₃O₄nanoparticles for application as MRI contrast agents: mastering size and magnetism for enhanced relaxivity

Pereira

Rocha

et al. 2015

J. Mater. Chem. B

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Graphical AbstractSuperparamagnetic Fe 3 O 4 nanomaterials with enhanced relaxometric properties were prepared by coprecipitation using alkanolamines with different chelating properties. The alkanolamines promoted these achievements by mastering the surface magnetic properties upon size reduction. AbstractThis work reports the mastered design of novel water-dispersible superparamagnetic iron oxide nanomaterials with enhanced magnetic properties and reduced size. A straightforward cost-effective aqueous coprecipitation route was developed, based on the use of three new coprecipitation agents: the polydentate bases diethanolamine, triethanolamine and triisopropanolamine. Through the selection of these alkanolamines which presented different complexing properties, an improvement of the surface spin order could be achieved upon the reduction of the nanomaterial dimensions (from 8.7 to 3.8 nm) owing to the complexation of the polydentate bases with the subcoordinated iron cations on the particle surface. In particular, the alkanolamine with the highest chelating ability (triethanolamine) led to the nanomaterial with the smallest size and the thinnest magnetic "dead" layer.In order to evaluate the importance of the dual control of size and magnetism, the relaxometric properties of the nanomaterials were investigated, whereby maximum values of transverse relaxivity r 2 of 300.30 and 253.92 mM -1 s -1 at 25 and 37 ºC, respectively (at 20 MHz) were achieved, making these nanomaterials potential T 2weighted MRI contrast agents. Moreover, these values were significantly higher than those reported for commercial T 2 contrast agents and other iron oxides with identical dimensions. Hence, we were able to demonstrate that the r 2 enhancement cannot only be achieved by an increase of particle/cluster size, but also through the precise control of the surface magnetic properties while constraining the nanomaterial dimensions. These achievements open new perspectives on the mastered design of magnetic nanoprobes, overcoming the limitations related with the deleterious effect of size reduction. the presence or absence of a hydrophilic capping/coating agent. 12,13 The versatility of this process lies on its cost-effectiveness, eco-sustainability (mild reaction conditions, non-toxic reagents) and scalability. 12-14 Additionally, it offers the possibility of directly obtaining water-dispersible nanomaterials without requiring further treatments, which is of prime importance for biomedical applications. However, the control over the particle

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Section: Figurementioning

confidence: 99%

Architectured design of superparamagnetic Fe₃O₄nanoparticles for application as MRI contrast agents: mastering size and magnetism for enhanced relaxivity

Pereira

Rocha

et al. 2015

J. Mater. Chem. B

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“…Iron oxide is an important inorganic material having magnetic properties as well as good stability in aqueous dispersion [2]. Particularly, Fe 2 O 3 nanoparticles find wide applications in gas sensing [3], Li-ion batteries [4,5], magnetizations and water treatment [6,7], hydrogen production [8], cancer treatment [9], surface enhanced Raman scattering and electrocatalysis [10], degradation of pharmaceutical compounds [11], supercapacitor [12] and as a heterogeneous catalyst [13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Magnetically separable γ-Fe2O3 nanoparticles: An efficient catalyst for acylation of alcohols, phenols, and amines using sonication energy under solvent free condition

Bhosale

Ummineni

Sasaki

et al. 2015

Journal of Molecular Catalysis A: Chemical

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“…The coprecipitation and sonochemical methods mentioned above have several intrinsic draw-backs which include difficulty in producing highly uniform sized MIONPs, relatively low degree of crystallinity [42]. Thermal decomposition is a popular method used in industries to synthesise narrow sized MIONPs.…”

Section: Thermal Decomposition Methodsmentioning

confidence: 99%

Multifunctional magnetic iron oxide nanoparticles: diverse synthetic approaches, surface modifications, cytotoxicity towards biomedical and industrial applications

Natarajan

Harini

Gajula³

et al. 2019

BMC Mat

103

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Magnetic iron oxide nanoparticles (MIONPs) play a major role in the emerging fields of nanotechnology to facilitate rapid advancements in biomedical and industrial platforms. The superparamagnetic properties of MIONPs and their environment friendly synthetic methods with well-defined particle size have become indispensable to obtain their full potential in a variety of applications ranging from cellular to diverse areas of biomedical science. Thus, the broadened scope and need for MIONPs in their demanding fields of applications required to be highlighted for a comprehensive understanding of their state-of-the-art. Many synthetic methods, however, do not entirely abolish their undesired cytotoxic effects caused by free radical production and high iron dosage. In addition, the agglomeration of MIONPs has also been a major problem. To alleviate these issues, suitable surface modification strategies adaptive to MIONPs has been suggested not only for the effective cytotoxicity control but also to minimize their agglomeration. The surface modification using inorganic and organic polymeric materials would represent an efficient strategy to utilize the diagnostic and therapeutic potentials of MIONPs in various human diseases including cancer. This review article elaborates the structural and magnetic properties of MIONPs, specifically magnetite, maghemite and hematite, followed by the important synthetic methods that can be exploited for biomedical approaches. The in vivo cytotoxic effects and the possible surface modifications employed to eliminate the cytotoxicity thereby enhancing the nanoparticle efficacy are also critically discussed. The roles and applications of surface modified MIONPs in medical and industrial platforms have been described for the benefits of global well-being.

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Novel complex-coprecipitation route to form high quality triethanolamine-coated Fe3O4 nanocrystals: Their high saturation magnetizations and excellent water treatment properties

Cited by 50 publications

References 45 publications

Architectured design of superparamagnetic Fe₃O₄nanoparticles for application as MRI contrast agents: mastering size and magnetism for enhanced relaxivity

Architectured design of superparamagnetic Fe₃O₄nanoparticles for application as MRI contrast agents: mastering size and magnetism for enhanced relaxivity

Magnetically separable γ-Fe2O3 nanoparticles: An efficient catalyst for acylation of alcohols, phenols, and amines using sonication energy under solvent free condition

Multifunctional magnetic iron oxide nanoparticles: diverse synthetic approaches, surface modifications, cytotoxicity towards biomedical and industrial applications

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Novel complex-coprecipitation route to form high quality triethanolamine-coated Fe3O4 nanocrystals: Their high saturation magnetizations and excellent water treatment properties

Cited by 50 publications

References 45 publications

Architectured design of superparamagnetic Fe3O4nanoparticles for application as MRI contrast agents: mastering size and magnetism for enhanced relaxivity

Architectured design of superparamagnetic Fe3O4nanoparticles for application as MRI contrast agents: mastering size and magnetism for enhanced relaxivity

Magnetically separable γ-Fe2O3 nanoparticles: An efficient catalyst for acylation of alcohols, phenols, and amines using sonication energy under solvent free condition

Multifunctional magnetic iron oxide nanoparticles: diverse synthetic approaches, surface modifications, cytotoxicity towards biomedical and industrial applications

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Architectured design of superparamagnetic Fe₃O₄nanoparticles for application as MRI contrast agents: mastering size and magnetism for enhanced relaxivity

Architectured design of superparamagnetic Fe₃O₄nanoparticles for application as MRI contrast agents: mastering size and magnetism for enhanced relaxivity