Large-Scale Fe<sub>3</sub>O<sub>4</sub>Nanoparticles Soluble in Water Synthesized by a Facile Method

Chen, Hui; Shen, Chengmin; Yang, Tianzhong; Bao, Lihong; Hui, Hui; Ding, Hao; Li, Chen; Gao, Hongjun

doi:10.1021/jp801632p

Cited by 272 publications

(184 citation statements)

References 38 publications

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“…2 showing five dominant diffraction peaks (220, 311, 400, 511 and 440) characteristic for spinal structure of magnetite (M) phase and two characteristic peaks of goethite (G) commonly presents as impurity in magnetite. 25,26) The XRD pattern of coated magnetite shows similarity of diffraction peaks suggesting that the magnetic core was unchanged within the silica matrix. Coating process does not change the peak position but the intensity, particularly for index plane [311], decreases with the presence of silica and mercapto groups.…”

Section: Crystallinitymentioning

confidence: 99%

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Adsorption of Au(III), Cu(II) and Ni(II) on Magnetite Coated with Mercapto Groups Modified Rice Hull Ash Silica

Nuryono¹,

Muliaty²,

Rusdiarso³

et al. 2014

J.I.E.

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Adsorption of Au(III) in multi-metal systems Au/Cu/Ni on mercapto modified silica coated on magnetite (Fe 3 O 4 /SiO 2 -SH) has been studied. Fe 3 O 4 /SiO 2 -SH was synthesized via sol-gel process by using magnetite obtained through co-precipitation of Fe 2+ /Fe 3+ salt mixture with NH 4 OH as the precipitating solution, sodium silicate solution extracted from rice hull ash and 3-mercaptopropyltrimethoxysilane (MPTMS) as the mercapto group source. Fe 3 O 4 /SiO 2 -SH was characterized with Fourier transform infrared (FTIR) spectrophotometer, X-ray diffraction (XRD) and ion chromatography for sulfur analysis. Optimization of Au(III) adsorption in a batch system was carried out as function of pH, contact time and ion concentration. Adsorption kinetics was evaluated with pseudo-first order and pseudo-second order models based on the data of contact time variation, while the adsorption isotherm was studied based on Langmuir and Freundlich models. The adsorbed metal ions Au(III), Cu(II) and Ni(II) quantitatively were calculated based on the difference of metal concentrations before and after adsorption analyzed with flame atomic absorbance spectrophotometer (FAAS). Results of characterization showed that Fe 3 O 4 /SiO 2 -SH has been successfully synthesized. Adsorption of Au(III) on Fe 3 O 4 /SiO 2 -SH slightly decreased with increasing the pH in a range of 2.0-6.0 and fits to pseudo-second order model with the rate constant of 1.37x10 -3 g mg -1 min -1 . Fe 3 O 4 /SiO 2 -SH shows a linear plot of Langmuir isotherm model with adsorption the capacity for Au(III) of 125 mg/g. Adsorption on multimetal systems shows that capacity of Au(III) on Fe 3 O 4 /SiO 2 -SH is higher than that of Cu(II) and Ni(II), and high selectivity for Au(III) toward Cu(II) and Ni(II) ions.

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Section: Crystallinitymentioning

confidence: 99%

“…In this case, a mixture of two and three metal ions (Au/Cu, Au/Ni, and Au/Cu/Ni) in an aqueous solution with various concentrations (25,50,100,150,200 and 300 mg.L -1 ) at the same concentration ratio (1:1) was contacted to adsorbent in a batch system and model is presented in Table 4. .…”

Section: Multimetal System Effect Of Metal Ion Competitionmentioning

confidence: 99%

Adsorption of Au(III), Cu(II) and Ni(II) on Magnetite Coated with Mercapto Groups Modified Rice Hull Ash Silica

Nuryono¹,

Muliaty²,

Rusdiarso³

et al. 2014

J.I.E.

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“…In nanoscale, the factors which determine the yield of oil recovery are: pore shape, roughness, water distribution and surfactant film behavior [1]. The use of nanoparticles can destabilise the emulsion required, and control the characteristics and their rheological properties [15]. In oil well environment, nanoparticles are exposed to the following forces: Coulombic, disjoining, Marangoni, capillary, viscous, gravity [4,[16][17][18] The balance between Van der Waals attractive forces and electrical repulsive forces determines the stability [4].…”

Section: Introductionmentioning

confidence: 99%

Optimum Conditions for EOR Using Nanofluids Subjected to EM Waves

Kashif

Puspitasari

2017

JMEST

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Today's major challenge for oil industry is to improve the oil recovery from the reservoir. Various enhanced oil recovery (EOR) methods have been applied in the field and the steam injection is one of the most favourable methods. The deep reservoir will result in failure of this method due to excessive heat dissipation. In this situation, generating and injecting steam may be uneconomical due to the tremendous reduction of the recovery. Some methods using nanotechnology have been introduced and elaborated. However, we propose the electromagnetic (EM) method as an alternative due to its long range transmission of the transverse waves. These EM waves, coupled with some nanoparticles (NP), can modify the surface energy. We propose an optimum conditions based on some parameters namely, frequency, flux density, space charge density and skin depth, employing Maxwell and Helmholtz equations which interact with some magnetic and dielectric nanoparticles. A newly-designed EM antenna with a very high flux density is the model for this specific purpose. The electrical energy from the antenna transfers the waves to the dielectric and resistive nanoparticles, which is then transferred to the fluid with high capillary force. This results in lower surface tension which reduces the oil viscosity. In order to investigate the transport phenomena of the nanoparticles in porous medium, we applied Darcy's law. Our preliminary study for scale model simulations showed that at a frequency of 0.125Hz, the electric field of the curve antenna with magnetic feeders was 4280% higher compared to the one without magnetic feeders,At a frequency of 0.125Hz, the magnetic field of the curve antenna with magnetic feeders was 3677% higher in comparison with the one without magnetic feeders. With the increasing frequency from 0.125Hz to 9Hz, the electric field and magnetic field of the antenna with feeders decreased by 99%. The permeability and porosity of glass beads packed column was 30.58mD and 25.87 % respectively. It was observed that the cumulative recovery of oil reached 21.11% by usingZnO nanofluid with electromagnetic waves, 17.23% by using ZnO nanofluid without electromagnetic waves, 32.59% by using iron oxide nanofluid with electromagnetic waves, and 29.68% by using iron oxide nanofluid without electromagnetic waves. In summary, the use of ZnO and iron oxide nanoparticles as nanofluids with electromagnetic waves is considered the most effective to use in enhanced oil recovery.

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“…To stabilize the magnetic NPs in the dispersion, various surfactants, such as poly(acrylic acid) and citric acid (CA), have been used. 13,21,26,31,33,34 Ditsch and coworkers 21 controlled the size of IO NPs with random copolymers of acrylic acid styrenesulfonic acid and vinylsulfonic acid. By using two di®erent polymers, they formed stable 74-nm nanoclusters.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Iron Oxide Nanoclusters with Enhanced Magnetization and Their Applications in Pulsed Magneto-Motive Ultrasound Imaging

Yoon

Mehrmohammadi

Borwankar

et al. 2015

NANO

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We report here a facile synthetic approach for preparing water-soluble Fe 3 O 4 nanoparticle (NP) clusters with tunable size distribution and magnetic properties. The primary NP sizes were controlled by tuning the nucleation and growth rates with temperature and ligand concentration while the nanocluster sizes were manipulated by controlling interparticle interactions. We have investigated the size control of clusters as well as individual primary NPs via dynamic light scattering (DLS) analysis and transmission electron microscopy (TEM). Superconducting quantum interference device (SQUID) was used to measure the magnetic properties of Fe 3 O 4 NP for determining the e®ect of size distribution at room temperature. These water dispersible NP clusters can be utilized in various biomedical applications. In this study, we demonstrated the application of synthesized nanoclusters to enhance imaging contrast a novel ultrasound-based imaging modality, pulsed magneto-motive ultrasound (pMMUS) imaging. Our results indicated that by using the NP clusters with enhanced magnetic properties, the pMMUS signal increased signi¯cantly which is an essential requirement for further development of in vivo pMMUS imaging.

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Large-Scale Fe₃O₄Nanoparticles Soluble in Water Synthesized by a Facile Method

Cited by 272 publications

References 38 publications

Adsorption of Au(III), Cu(II) and Ni(II) on Magnetite Coated with Mercapto Groups Modified Rice Hull Ash Silica

Adsorption of Au(III), Cu(II) and Ni(II) on Magnetite Coated with Mercapto Groups Modified Rice Hull Ash Silica

Optimum Conditions for EOR Using Nanofluids Subjected to EM Waves

Synthesis of Iron Oxide Nanoclusters with Enhanced Magnetization and Their Applications in Pulsed Magneto-Motive Ultrasound Imaging

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Large-Scale Fe3O4Nanoparticles Soluble in Water Synthesized by a Facile Method

Cited by 272 publications

References 38 publications

Adsorption of Au(III), Cu(II) and Ni(II) on Magnetite Coated with Mercapto Groups Modified Rice Hull Ash Silica

Adsorption of Au(III), Cu(II) and Ni(II) on Magnetite Coated with Mercapto Groups Modified Rice Hull Ash Silica

Optimum Conditions for EOR Using Nanofluids Subjected to EM Waves

Synthesis of Iron Oxide Nanoclusters with Enhanced Magnetization and Their Applications in Pulsed Magneto-Motive Ultrasound Imaging

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Product

Resources

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Large-Scale Fe₃O₄Nanoparticles Soluble in Water Synthesized by a Facile Method