Synthesis of magnetic iron oxide nanoparticles onto fluorinated carbon fabrics for contaminant removal and oil-water separation

Zhang, Jiahao; Shao, Yawei; Hsieh, Chien‐Te; Chen, Yu-Fu; Su, Tzu-Chiao; Hsu, Jo-Pei; Juang, Ruey‐Shin

doi:10.1016/j.seppur.2016.11.006

Cited by 51 publications

(11 citation statements)

References 40 publications

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“…By combining the NMOs with MWCNTs, an enhancement in the adsorptive and magnetic properties can be obtained. In particular, the recent applications of magnetic NPs, functionalized NMOs, and solid magnetic matrices have also been employed for oil-water separation [20][21][22]. By magnetizing the oil with magnetic nanopowders, the oil can easily be covered and then separated magnetically with a permanent magnet.…”

Section: Introductionmentioning

confidence: 99%

AC Susceptibility Studies under DC Fields in Superspinglass Nanomaghemite-Multiwall Carbon Nanotube Hybrid

2021

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Magnetic properties of maghemite (γ-Fe2O3) nanoparticles grown on activated multiwall carbon nanotubes have been studied by alternating current (AC) magnetic susceptibility experiments performed under different temperatures, frequencies, and applied magnetic fields. Transmission electron images have suggested that the γ-Fe2O3 nanoparticles are not isolated and have an average size of 9 nm, but with a relatively broad size distribution. The activation energies of these 9 nm γ-Fe2O3 nanoparticles, determined from the generalized Vogel–Fulcher relation, are reduced upon increasing the direct current (DC) field magnitude. The large activation energy values have indicated the formation of a superspinglass state in the γ-Fe2O3 nanoparticle ensemble, which were not observed for pure γ-Fe2O3 nanoparticles, concluding that the multiwall carbon nanotubes favored the appearance of highly concentrated magnetic regions and hence the formation of superspinglass state. Magnetic relaxation studies, using Argand diagrams recorded for DC probe fields (<20 kOe) below the magnetic blocking temperature at 100 and 10 K, have revealed the presence of more than one relaxation process. The behavior of the ensemble of γ-Fe2O3 nanoparticles can be related to the superspinglass state and is also supported by Almeida–Thouless plots.

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Section: Introductionmentioning

confidence: 99%

AC Susceptibility Studies under DC Fields in Superspinglass Nanomaghemite-Multiwall Carbon Nanotube Hybrid

2021

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“…In general, the development of nanostructured, reactive materials for water treatment applications holds great promise due to the reactive degradation and improved removal processes that have been demonstrated [9]- [11]. In particular, both laboratoryscale and pilot-scale research studies have demonstrated that iron-based nanostructured materials, such as iron nanoparticles, are able to remove a wide variety of water contaminants, including dyes [12], [13], chlorinated organics [14], [15], pharmaceutical compounds [16], [17], and heavy metals [18], [19], through both oxidative and reductive reaction mechanisms. The process for the decomposition of the dyes by iron-based nanoparticles results from electron transfer from the metallic nanoparticle to the dye, which breaks the azo dye N=N double bond, creating a solution composed of aromatic amines [8].…”

Section: Introductionmentioning

confidence: 99%

Nickel-Iron Alloy Nanoparticle Characteristics Pre- and Post-Reaction With Orange G

Foster

Acharya

Abolhassani

et al. 2021

IEEE Open J. Nanotechnol.

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Bimetallic nanoparticles comprised of iron and nickel were synthesized, characterized, and evaluated to optimize the ideal metal ratio for azo dye removal from water systems. Results show that changing the molar ratio of nickel to iron caused different removal rates, as well as the extent of overall elimination of azo dye from water. Lower molar ratios, from Ni1Fe10 to Ni2.5Fe10, exhibited a higher removal efficiency of 80-99%. Higher concentrations of Ni in the catalyst, from Ni3Fe10 to Ni5Fe10, resulted in 70-90% removal. The lower molar ratios of Ni exhibited a consistent removal rate of 0.11 g/L/min, while the higher molar ratios of Ni displayed varying removal rates of 0.1-0.05 g/L/min. A second order kinetic model was fit to the first twenty minutes of the reaction for all nickel to iron compositions, where there is a decrease in rate constant with an increase in molar ratio. During the last forty minutes of reaction, azo dye removal fit a zero order kinetic model. All as-synthesized nanoparticle samples were found to be structurally disordered based on the lack of distinct peaks in XRD spectra. Post-reaction samples were found to have Fe2O3 and FeOOH cubic peaks.

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“…Inspired by this information, our group developed the superhydrophobic and anticorrosive electroless fluoroalkylsilane (FAS)@Ni–P coating meshes for rapid water–oil separation and the highest separation efficiency of the mesh was 96.8%. Compared with the inorganic oxide coatings and organic polymer coatings, , the zeolite membranes, specifically the Mobil five (MFI) zeolite membranes, have attracted considerable interest in both industrial and academic areas of oil–water separation because of their high thermal and mechanical stability, excellent chemical stability, and high corrosion resistance. − For example, Liu et al , prepared the hydrophilic MFI-type zeolite coatings on the porous stainless steel (SS) meshes (SSMs) by in situ and secondary growth methods. The oil rejection rates of the as-prepared meshes are above 96% for various oils.…”

Section: Introductionmentioning

confidence: 99%

Corrosion-Resistant Hydrophobic MFI-Type Zeolite-Coated Mesh for Continuous Oil–Water Separation

Cai

Zhao

Quan

et al. 2020

Ind. Eng. Chem. Res.

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Efficient separation of oil–water mixtures has become a critical challenge due to frequent oil-spill accidents and enormous release of oil-containing wastewater by households or catering services. Superhydrophobic coatings on metal meshes have been evidenced as the effective and energy-saving materials for oil–water separation. However, it is difficult to fabricate the separating coatings with long-term superhydrophobicity and the outstanding anticorrosion properties for practical application. In this study, we fabricated the hydrophobic Mobil five (MFI)-type zeolite coatings on the pristine stainless steel meshes via an in situ crystallization method and subsequently modified them with an environmentally safe hexadecyltrimethoxysilane compound. The as-prepared coating meshes showed good self-cleaning, antifouling, and anticorrosion properties. Furthermore, the coated meshes were capable of continuously and efficiently separating different kinds of oil–water mixtures under gravity-driven pressure and had more than 99.0% high separation efficiency. More important, the prepared hydrophobic MFI-coated meshes had equivalent separation performance compared to that of superhydrophobic coating meshes. Meanwhile, the hydrophobic MFI-coated meshes demonstrated excellent reusability performance and long-term stability. These as-prepared meshes thus have great potential for applications in separating oily wastewater from oil fields as well as recycling of waste oil from catering services.

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Synthesis of magnetic iron oxide nanoparticles onto fluorinated carbon fabrics for contaminant removal and oil-water separation

Cited by 51 publications

References 40 publications

AC Susceptibility Studies under DC Fields in Superspinglass Nanomaghemite-Multiwall Carbon Nanotube Hybrid

AC Susceptibility Studies under DC Fields in Superspinglass Nanomaghemite-Multiwall Carbon Nanotube Hybrid

Nickel-Iron Alloy Nanoparticle Characteristics Pre- and Post-Reaction With Orange G

Corrosion-Resistant Hydrophobic MFI-Type Zeolite-Coated Mesh for Continuous Oil–Water Separation

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