Synthesis of hierarchically structured iron oxide in magnetic field and their hydrophobic property

Zhang, Chun; Mo, Zunli; Jiang, Caidi; Zhang, Ping; Guo, Ruibin

doi:10.1039/c3ce40515j

Cited by 8 publications

(10 citation statements)

References 31 publications

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“…3A). When combined with the HRTEM results, it is further confirmed that the nanowires grew along [110], one of the easy magnetic axes of Fe 3 O 4 (Fig. 3B).…”

Section: Synthesis Of 1d Nanomaterials Under Magnetic Fieldsmentioning

confidence: 56%

“…The direction that can minimize the energy of the magnetization vector of single-phase nanocrystalline ferromagnets is called the easy axis. Fe 3 O 4 has easy magnetic axes along the [111] and [110] directions. Therefore, an applied external magnetic field might induce oriented growth along the easy magnetic axis, which could result in the formation of 1D nanostructure.…”

Section: Synthesis Of 1d Nanomaterials Under Magnetic Fieldsmentioning

confidence: 99%

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Synthesis and assembly of nanomaterials under magnetic fields

2014

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Traditionally, magnetic field has long been regarded as an important means for studying the magnetic properties of materials. With the development of synthesis and assembly methods, magnetic field, similar to conventional reaction conditions such as temperature, pressure, and surfactant, has been developed as a new parameter for synthesizing and assembling special structures. To date, magnetic fields have been widely employed for materials synthesis and assembly of one-dimensional (1D), two-dimensional (2D) or three-dimensional (3D) aggregates. In this review, we aim to provide a summary on the applications of magnetic fields in this area. Overall, the objectives of this review are: (1) to theoretically discuss several factors that refer to magnetic field effects (MFEs); (2) to review the magnetic-field-induced synthesis of nanomaterials; the 1D structure of various nanomaterials, such as metal oxides/sulfide, metals, alloys, and carbon, will be described in detail. Moreover, the MFEs on spin states of ions, magnetic domain and product phase distribution will be also involved; (3) to review the alignment of carbon nanotubes, assembly of magnetic nanomaterials and photonic crystals with the help of magnetic fields; and (4) to sketch the future opportunities that magnetic fields can face in the area of materials synthesis and assembly.

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“…3A). When combined with the HRTEM results, it is further confirmed that the nanowires grew along [110], one of the easy magnetic axes of Fe 3 O 4 (Fig. 3B).…”

Section: Synthesis Of 1d Nanomaterials Under Magnetic Fieldsmentioning

confidence: 56%

Section: Synthesis Of 1d Nanomaterials Under Magnetic Fieldsmentioning

confidence: 99%

Synthesis and assembly of nanomaterials under magnetic fields

2014

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“…In the literatures, a variety of hierarchical nanostructured iron oxides had been fabricated [1][2][3][4][5][6] . It is important not only for their fundamental scientific interest but also for many technological applications.…”

Section: Introductionmentioning

confidence: 99%

“…Nanostructured α-Fe 2 O 3 have been demonstrated not only excellent photocatalytic activity for water oxidation, degradation of organic pollutants, and antimicrobial, but also effective adsorption ability for organic dyes and heavy metal ions [18][19][20][21] . These methods include hydrothermal precipitation reaction [9] , hydrothermal-wicrowave method [22] , solvothermal method [23] , microwave-assisted solvothermal method [24] , continuous 4 feature. These methods include hydrothermal precipitation reaction [9] , hydrothermal-wicrowave method [22] , solvothermal method [23] , microwave-assisted solvothermal method [24] , continuous 4 feature.…”

Section: Introductionmentioning

confidence: 99%

Eco-friendly synthesis and photodegradation of hierarchical nanostructures of β-FeOOH and α-Fe₂O₃

Meng

Chen

et al. 2015

RSC Adv.

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Hierarchical nanostructures β-FeOOH and α-Fe 2 O 3 with different morphology were successfully synthesized via a facile and green hydrolysis-aging method using urea or saccharide as organic matrix. Experimental results showed that the well crystallized β-FeOOH and α-Fe 2 O 3 could obtain without higher temperature processing. Systematic control on the morphology and microstructure of the products was achieved by regulating the aging time and the concentration of organic matrix.The amount of saccharide was very important in stabilizing metastable β-FeOOH.The formation mechanism of various morphologies and the cause of stabilizing β-FeOOH were tentatively proposed on the basis of the evolution of the structure and the morphology, along with variation of the reactive conditions. Also, degradation efficiencies of the α-Fe 2 O 3 and β-FeOOH with different morphologies toward methylene blue were preliminarily investigated, revealing that as-obtained α-Fe 2 O 3 and β-FeOOH possessed promising photodegradation activity and had potential application in wastewater treatment. spray pyrolysis method [25] , liquid phase-based ultrasonic-assisted method [26] , biphasic interfacial reaction [27] , thermal decomposition process [28] , chemical precipitation reaction [29] , biomimetic synthesis [30] , and so on.Akaganeite (β-FeOOH) is also an important kind of iron oxides semiconductor with a band gap of 2.12 eV. Likewise, β-FeOOH has attracted much attention because of its channel-type nanoporous structure and unique sorption, ion exchange, and catalytic properties [31][32][33][34] . On other hand, β-FeOOH is always served as a precursor in the preparation of ferromagnetic α-Fe 2 O 3 because of its thermodynamic metastable

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“…The application of magnetic nanoparticles as adsorbent materials in solving environmental problems has received great attention due to their unique physical and chemical properties, which make them superior to traditional adsorbents [4,5]. Nanosized magnetic particles are considered as potential adsorbents for aqueous heavy metals due to their high surface area and the unique advantage of easy separation under external magnetic fields [6]. To further facilitate the adsorption affinity, surface modification, including physical coating and covalent binding, has often been explored to enable specific metal complexation [7,8].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of magnetic crosslinked starch-graft-poly(acrylamide)-co-sodium xanthate and its application in removing heavy metal ions

Wang

Zhang

Chang

2017

Journal of Experimental Nanoscience

Self Cite

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This paper describes the synthesis and characterisation of a magnetic crosslinked starch-graft-poly(acrylamide)-co-sodium xanthate (M-CSAX) nanocomposite based on magnetic starch (MCS), acrylamide (AM) and sodium xanthate that underwent heavy metal ions removal in response to an external magnetic field. The material was prepared using magnetic particle Fe 3 O 4 nanoflakes (NFs) together with vinylated starch and poly(acrylamide)-cosodium xanthate via an ultrasound-assisted radical crosslinking/ polymerisation reaction. MCS was synthesised by a direct compounding method using Fe 3 O 4 NFs as nuclear and vinylated starch as shell. The obtained M-CSAX has a saturation magnetisation value of 19.21 emu¢g ¡1. Flocculation experiment results showed that the composites have functions of removing both turbidity and heavy metal ions from aqueous solution, and can adsorb 78.3% of Pb 2+ and 63% of Cu 2+ from the corresponding salt solutions. The findings of the present work highlight the potential for using M-CSAX as an effective and recyclable adsorbent for wastewater treatment.

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Synthesis of hierarchically structured iron oxide in magnetic field and their hydrophobic property

Cited by 8 publications

References 31 publications

Synthesis and assembly of nanomaterials under magnetic fields

Synthesis and assembly of nanomaterials under magnetic fields

Eco-friendly synthesis and photodegradation of hierarchical nanostructures of β-FeOOH and α-Fe₂O₃

Synthesis of magnetic crosslinked starch-graft-poly(acrylamide)-co-sodium xanthate and its application in removing heavy metal ions

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Synthesis of hierarchically structured iron oxide in magnetic field and their hydrophobic property

Cited by 8 publications

References 31 publications

Synthesis and assembly of nanomaterials under magnetic fields

Synthesis and assembly of nanomaterials under magnetic fields

Eco-friendly synthesis and photodegradation of hierarchical nanostructures of β-FeOOH and α-Fe2O3

Synthesis of magnetic crosslinked starch-graft-poly(acrylamide)-co-sodium xanthate and its application in removing heavy metal ions

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Eco-friendly synthesis and photodegradation of hierarchical nanostructures of β-FeOOH and α-Fe₂O₃