Preparation, characteristics, convection and applications of magnetic nanofluids: A review

Kumar, Aditya; Subudhi, Sudhakar

doi:10.1007/s00231-017-2114-4

Cited by 49 publications

(26 citation statements)

References 113 publications

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“…In order to remove mercury from aqueous solution, adsorption technology, as a cost-effective method, is widely researched and used [4]. Among many adsorbents, magnetic nanomaterials are a novel functional material type with unique physical and chemical properties, the most critical of which is that it can easily achieve separation from water under an external magnet [5], which can significantly reduce the operational cost.…”

Section: Introductionmentioning

confidence: 99%

Facile Synthesis of Polypyrrole-Functionalized CoFe2O4@SiO2 for Removal for Hg(II)

et al. 2019

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In order to avoid using toxic or harmful operational conditions, shorten synthesis time, enhance adsorption capacity, and reduce operational cost, a novel magnetic nano-adsorbent of CoFe2O4@SiO2 with core–shell structure was successfully functionalized with polypyrrole (Ppy). The physical and chemical properties of CoFe2O4@SiO2-Ppy are examined by various means. The as-prepared CoFe2O4@SiO2-Ppy nanomaterial was used to adsorb Hg2+ from water. During the process, some key effect factors were studied. The adsorption process of Hg2+ onto CoFe2O4@SiO2-Ppy was consistent with the pseudo-second-order kinetic and Langmuir models. The Langmuir capacity reached 680.2 mg/g, exceeding those of many adsorbents. The as-prepared material had excellent regeneration ability, dispersibility, and stability. The fitting of kinetics, isotherms, and thermodynamics indicated the removal was endothermic and spontaneous, and involved some chemical reactions. The application evaluation of electroplating wastewater also shows that CoFe2O4@SiO2-Ppy is an excellent adsorbent for Hg2+ ions from water.

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Section: Introductionmentioning

confidence: 99%

Facile Synthesis of Polypyrrole-Functionalized CoFe2O4@SiO2 for Removal for Hg(II)

et al. 2019

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“…Nanofluids, which are generally nanoparticles dispersed in liquids, have been gaining significant attention lately considering their potential in wide range of applications [10]- [13]. Nanofluids are a new class of fluids engineered by dispersing nanoparticles of size less than 100 nm in base fluids.…”

Section: Introductionmentioning

confidence: 99%

“…It contains a small volume fraction of nanoparticles, nanowires, or nanotubes for targeted changes in thermal, rheological and other properties. Due to a nanoscale colloidal suspension containing condensed nanomaterials, nanofluids have been found to possess highly enhanced physical, chemical, thermal and transport properties compared to the base fluids, which demonstrates the great potential of nanofluids to a range of applications in many fields such as combustion, liquid propellant catalyst carriers, and reduction of combustion instability in rocket motors, microelectronics, optical and thermal emission devices, energy storage, heat exchangercooling systems, hydrogen generation, nuclear safety, and in underwater and military applications [7]- [13].…”

Section: Introductionmentioning

confidence: 99%

Laser Plasma Induced TiO₂ Nanoparticle Synthesis in Water and Particle Characterization

Rajan

Hassan

2019

IEEE Access

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Nanofluids with nanoscale colloidal suspensions having condensed nanomaterials have been found to show highly enhanced physical, chemical, thermal, and transport properties and signify great potential in many fields. In this paper, laser-induced plasmas at liquid-metal phase boundaries are investigated for titanium oxide (TiO 2) nanoparticle synthesis in water without any surfactants. The nanoparticles are generated using 1064 nm NdYAG laser ablation in a water confined plasma with 1.5 J laser energy pulsed at 10 Hz for 4 min, which resulted in nanoparticles of size ranging from 5 to 35 nm. The synthesized TiO 2 nanoparticles in water are characterized for their sizes, surface morphology, crystalline structures, and elemental compositions. The dynamic light scattering (DLS) measurements show the synthesized TiO 2 nanoparticles have an average size of 18 nm. The scanning electron microscopy (SEM) measurements show TiO 2 nanoparticles exhibit isolated and agglomerated nanoparticles with near-spherical and irregular surface morphologies. The Transmission electron microscopy (TEM) measurements show TiO 2 nanoparticles with near-spherical and irregular shapes, and the average size of the nanoparticles is ∼17 nm. The selected area electron diffraction (SAED) measurements show single and poly crystalline structures present in the TiO 2 nanoparticles. The energy-dispersive X-ray spectroscopy (EDX) measurements show the purity of TiO 2 nanoparticles with identification of Ti and O elements. The X-ray diffraction (XRD) measurements confirm that the TiO 2 nanoparticles are crystalline in nature and confirmed the presence and coexistence of two crystal phases of TiO 2 nanoparticles, such as anatase and rutile phases, and estimated nanoparticle size in the range between 11 and 31 nm. INDEX TERMS Nanofluids, nanomanufacturing, laser ablation in liquids, TiO 2 nanofluids, dynamic light scattering, electron microscopy, X-ray diffraction.

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“…Previous literature on the MC devices focused mainly on micro-scale, and small-scale low power devices for cooling waste heat from heat loads operating below 100°C [17,18,64,66,67]. Multiple magnets were used to improve the cooling performance [68,69].…”

Section: Noveltymentioning

confidence: 99%

“…Theoretical models for the thermal conductivity improvement have been developed by many researchers. The Maxwell formula [68] (equation (2.10)) is extensively used to evaluate the thermal conductivity of solid-liquid mixtures, but it doesn't consider the shape of the solid particles [69].…”

Section: Theoretical Background For the Enhancement Of Ferrofluid Thermal Conductivitymentioning

confidence: 99%

Magneto-fluidic materials and systems for energy applications

Pattanaik¹

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Preparation, characteristics, convection and applications of magnetic nanofluids: A review

Cited by 49 publications

References 113 publications

Facile Synthesis of Polypyrrole-Functionalized CoFe2O4@SiO2 for Removal for Hg(II)

Facile Synthesis of Polypyrrole-Functionalized CoFe2O4@SiO2 for Removal for Hg(II)

Laser Plasma Induced TiO₂ Nanoparticle Synthesis in Water and Particle Characterization

Magneto-fluidic materials and systems for energy applications

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Preparation, characteristics, convection and applications of magnetic nanofluids: A review

Cited by 49 publications

References 113 publications

Facile Synthesis of Polypyrrole-Functionalized CoFe2O4@SiO2 for Removal for Hg(II)

Facile Synthesis of Polypyrrole-Functionalized CoFe2O4@SiO2 for Removal for Hg(II)

Laser Plasma Induced TiO2 Nanoparticle Synthesis in Water and Particle Characterization

Magneto-fluidic materials and systems for energy applications

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Laser Plasma Induced TiO₂ Nanoparticle Synthesis in Water and Particle Characterization