Synthesis of superparamagnetic Fe<sub>3</sub>O<sub>4</sub> nanocrystals in reverse microemulsion at room temperature

Hao, Junjie; Chen, H. L.; Ren, Cuiling; Yan, Na; Geng, Huijuan; Chen, X. G.

doi:10.1179/143307510x12777574295307

Cited by 16 publications

(4 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…96 Both o/w and w/o MEs are employed for synthesizing MIONs. [97][98][99] For example, Okoli et al synthesized MIONs with sizes ranging from 2 to 10 nm by using the ME method. An examination of the magnetic properties at 300 K revealed a large increase in the magnetization of approximately 35 emu g −1 for w/o-ME-MIONs with superparamagnetic behavior and nanoscale dimensions compared with o/w-ME-MIONs (10 emu g −1 ) because of the larger particles and anisotropic properties.…”

Section: Microemulsionmentioning

confidence: 99%

Designed synthesis and surface engineering strategies of magnetic iron oxide nanoparticles for biomedical applications

2016

View full text Add to dashboard Cite

Iron oxide nanoparticles (NPs) hold great promise for future biomedical applications because of their magnetic properties as well as other intrinsic properties such as low toxicity, colloidal stability, and surface engineering capability. Numerous related studies on iron oxide NPs have been conducted. Recent progress in nanochemistry has enabled fine control over the size, crystallinity, uniformity, and surface properties of iron oxide NPs. This review examines various synthetic approaches and surface engineering strategies for preparing naked and functional iron oxide NPs with different physicochemical properties. Growing interest in designed and surface-engineered iron oxide NPs with multifunctionalities was explored in in vitro/in vivo biomedical applications, focusing on their combined roles in bioseparation, as a biosensor, targeted-drug delivery, MR contrast agents, and magnetic fluid hyperthermia. This review outlines the limitations of extant surface engineering strategies and several developing strategies that may overcome these limitations. This study also details the promising future directions of this active research field.

show abstract

Section: Microemulsionmentioning

confidence: 99%

Designed synthesis and surface engineering strategies of magnetic iron oxide nanoparticles for biomedical applications

2016

View full text Add to dashboard Cite

show abstract

“…Magnetic nanoparticles are versatile materials with multiple applications [ 38 , 39 ]. They can be produced by several methods, including microemulsion [ 40 , 41 ], hydrothermal synthesis [ 42 , 43 ], thermal decomposition method [ 44 , 45 ], pyrolysis [ 46 , 47 ], sol-gel synthesis [ 48 , 49 ], and co-precipitation with bases [ 50 , 51 ]. Among these methods, the co-precipitation is the most used process [ 52 ].…”

Section: Introductionmentioning

confidence: 99%

Fe3O4-PEI Nanocomposites for Magnetic Harvesting of Chlorella vulgaris, Chlorella ellipsoidea, Microcystis aeruginosa, and Auxenochlorella protothecoides

Gerulová¹,

Kucmanová²,

Sanny³

et al. 2022

Nanomaterials

View full text Add to dashboard Cite

Magnetic separation of microalgae using magnetite is a promising harvesting method as it is fast, reliable, low cost, energy-efficient, and environmentally friendly. In the present work, magnetic harvesting of three green algae (Chlorella vulgaris, Chlorella ellipsoidea, and Auxenochlorella protothecoides) and one cyanobacteria (Microcystis aeruginosa) has been studied. The biomass was flushed with clean air using a 0.22 μm filter and fed CO2 for accelerated growth and faster reach of the exponential growth phase. The microalgae were harvested with magnetite nanoparticles. The nanoparticles were prepared by controlled co-precipitation of Fe2+ and Fe3+ cations in ammonia at room temperature. Subsequently, the prepared Fe3O4 nanoparticles were coated with polyethyleneimine (PEI). The prepared materials were characterized by high-resolution transmission electron microscopy, X-ray diffraction, magnetometry, and zeta potential measurements. The prepared nanomaterials were used for magnetic harvesting of microalgae. The highest harvesting efficiencies were found for PEI-coated Fe3O4. The efficiency was pH-dependent. Higher harvesting efficiencies, up to 99%, were obtained in acidic solutions. The results show that magnetic harvesting can be significantly enhanced by PEI coating, as it increases the positive electrical charge of the nanoparticles. Most importantly, the flocculants can be prepared at room temperature, thereby reducing the production costs.

show abstract

“…The solid phase is subsequently precipitated from the emulsion and the complete process consisting of nucleation, growth, coalescence and agglomeration finally forms spherical particles in a spherical droplet, as shown in Figure 4. The microemulsion method can prevent the agglomeration of particles while synthesizing Fe 3 O 4 but the yield of nanoparticles prepared by a single synthesis is low, the separation and purification process of particles is complicated and the water solubility is poor [36,37]. Sun et al [38] synthesized monodisperse Fe 3 O 4 and polyaniline core-shell nanocomposites by microemulsion polymerization.…”

Section: Micro-emulsion Methodsmentioning

confidence: 99%

Preparation and Potential Applications of Super Paramagnetic Nano-Fe3O4

et al. 2018

View full text Add to dashboard Cite

Ferroferric oxide nanoparticle (denoted as Nano-Fe 3 O 4 ) has low toxicity and is biocompatible, with a small particle size and a relatively high surface area. It has a wide range of applications in many fields such as biology, chemistry, environmental science and medicine. Because of its superparamagnetic properties, easy modification and function, it has become an important material for addressing a number of specific tasks. For example, it includes targeted drug delivery nuclear magnetic resonance (NMR) imaging in biomedical applications and in environmental remediation of pollutants. Few articles describe the preparation and modification of Nano-Fe 3 O 4 in detail. We present an evaluation of preparation methodologies, as the quality of material produced plays an important role in its successful application. For example, with modification of Nano-Fe 3 O 4 , the surface activation energy is reduced and good dispersion is obtained.

show abstract

Synthesis of superparamagnetic Fe₃O₄ nanocrystals in reverse microemulsion at room temperature

Cited by 16 publications

References 25 publications

Designed synthesis and surface engineering strategies of magnetic iron oxide nanoparticles for biomedical applications

Designed synthesis and surface engineering strategies of magnetic iron oxide nanoparticles for biomedical applications

Fe3O4-PEI Nanocomposites for Magnetic Harvesting of Chlorella vulgaris, Chlorella ellipsoidea, Microcystis aeruginosa, and Auxenochlorella protothecoides

Preparation and Potential Applications of Super Paramagnetic Nano-Fe3O4

Contact Info

Product

Resources

About

Synthesis of superparamagnetic Fe3O4 nanocrystals in reverse microemulsion at room temperature

Cited by 16 publications

References 25 publications

Designed synthesis and surface engineering strategies of magnetic iron oxide nanoparticles for biomedical applications

Designed synthesis and surface engineering strategies of magnetic iron oxide nanoparticles for biomedical applications

Fe3O4-PEI Nanocomposites for Magnetic Harvesting of Chlorella vulgaris, Chlorella ellipsoidea, Microcystis aeruginosa, and Auxenochlorella protothecoides

Preparation and Potential Applications of Super Paramagnetic Nano-Fe3O4

Contact Info

Product

Resources

About

Synthesis of superparamagnetic Fe₃O₄ nanocrystals in reverse microemulsion at room temperature