Magnetite Nanoparticles Surface Coating SiO&lt;sub&gt;2&lt;/sub&gt; and Magnetic Properties Evaluation

Ju, Dong Ying; Bian, Pei; Qing, Ge Letu; Lü, Da; He, Hong

doi:10.4028/www.scientific.net/kem.368-372.1366

Cited by 6 publications

(7 citation statements)

References 4 publications

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“…This may be due to the reaction between ABS and a small amount of the SiO 2 to form silicic acid in this stage. 42 The silicic acid would have decomposed in the subsequent stage, leading to greater weight loss at temperatures higher than 453 °C.…”

Section: Resultsmentioning

confidence: 99%

“…In the second weight loss interval, the weight loss of the AS/SiO 2 system (67%) was lower than that of the pure AS (78%). This may be due to the reaction between ABS and a small amount of the SiO 2 to form silicic acid in this stage . The silicic acid would have decomposed in the subsequent stage, leading to greater weight loss at temperatures higher than 453 °C.…”

Section: Resultsmentioning

confidence: 99%

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Insights into the Roasting Kinetics and Mechanism of Blast Furnace Slag with Ammonium Sulfate for CO₂ Mineralization

Yin

Aldahri

Rohani

et al. 2019

Ind. Eng. Chem. Res.

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A route for the indirect carbonation of different minerals using (NH 4 ) 2 SO 4 (AS) as a recyclable reagent has been recently proposed. For saving energy, the extraction of alkaline components, such as calcium and magnesium, is typically expected to occur at the roasting stage. To enhance the extraction efficiency, the kinetics and mechanism of the reaction between AS and blast furnace slag (BFS), a Ca/Mg-containing mineral, were investigated in this study. The results showed that the reaction consists of two steps: the decomposition of AS into ammonium bisulfate (ABS) and the reaction between the ABS and the BFS. Isothermal kinetics and equal conversion methods were used to determine the apparent activation energy and reaction-controlling steps in different temperature ranges. The results showed that the decomposition of AS was a chemicalreaction-controlled step with an apparent activation energy of 102 kJ• mol −1 . On the other hand, the reaction between ABS and BFS, which was very quick, was controlled by the ABS supply. During the reaction, a product accumulation layer was generated around the nonreactive BFS particles. However, it was found that ABS can easily pass through this layer and react with the BFS core. The formation of ABS was the limiting step in the roasting process.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Insights into the Roasting Kinetics and Mechanism of Blast Furnace Slag with Ammonium Sulfate for CO₂ Mineralization

Yin

Aldahri

Rohani

et al. 2019

Ind. Eng. Chem. Res.

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show abstract

“…Using ion exchangers and careful pH adjustment, SiO 2 formation from a sodium silicate solution can be achieved for the coating of magnetic nanoparticles. − However, this process is sophisticated, slow, and hard to control. Further investigations showed that a solid silica can be obtained from simply precipitating water glass in acid. − Indeed, a precipitate is formed if water glass is added to dilute HNO 3 . However, it seems that no proper silica network is obtained in that case.…”

Section: Resultsmentioning

confidence: 99%

Modified Superparamagnetic Nanocomposite Microparticles for Highly Selective Hg^II or Cu^II Separation and Recovery from Aqueous Solutions

Mandel

Hutter

Gellermann

et al. 2012

ACS Appl. Mater. Interfaces

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The synthesis of a reusable, magnetically switchable nanocomposite microparticle, which can be modified to selectively extract and recover Hg(II) or Cu(II) from water, is reported. Superparamagnetic iron oxide (magnetite) nanoparticles act as the magnetic component in this system, and these nanoparticles were synthesized in a continuous way, allowing their large-scale production. A new process was used to create a silica matrix, confining the magnetite nanoparticles using a cheap silica source [sodium silicate (water glass)]. This results in a well-defined, filigree micrometer-sized nanocomposite via a fast, simple, inexpensive, and upscalable process. Hence, because of the ideal size of the resulting microparticles and their comparably large magnetization, particle extraction from fluids by low-cost magnets is achieved.

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“…The effect of magnetic field applied by 10 × 10 × 10 mm NdFeB permanent magnet the behaviour of nanoparticles in yoghourt, partridge egg and agar were evaluated. [28][29] The egg was used for the experiment sample as a biomaterial sample. Ferrofluid was injected into the center part of the prepared egg with the injection syringe, and it is derivable in the neodymium magnet was tried.…”

Section: Dds Experiments In Biomaterialsmentioning

confidence: 99%

Drug Delivery Observation of Hydrophobe Ferrofluid and Magnetite Nanoparticals by SPring-8 Synchrotron Radiation

Bian

Kobayashi

et al. 2011

J. Nanosci. Nanotech.

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In this study, the composite magnetic nanoparticles of coated SiO nano film with about 8 nm size and high saturation magnetization value, were synthesized by liquid phase precipitation method. The magnetic nanoparticles can be dispersed in various liquid media, widely known as magnetic fluids or ferrofluids with both magnetic and liquid properties. The materials been collected great interests and more and more attentions to focus into Drug Delivery System (DDS) as a new technology in this paper. We use the composite nanoparticles to disperse H2O and inject the solutions into rat's in-vivo organs. And, in the experiments by using a strong photon beam of SPring-8 Synchrotron Radiation facility, the distribution stat and the effects of magnetic field as well as drug delivery behaviour of nanoparticles in the rat' kidney are verified by the in-vivo observations.

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Magnetite Nanoparticles Surface Coating SiO<sub>2</sub> and Magnetic Properties Evaluation

Cited by 6 publications

References 4 publications

Insights into the Roasting Kinetics and Mechanism of Blast Furnace Slag with Ammonium Sulfate for CO₂ Mineralization

Insights into the Roasting Kinetics and Mechanism of Blast Furnace Slag with Ammonium Sulfate for CO₂ Mineralization

Modified Superparamagnetic Nanocomposite Microparticles for Highly Selective Hg^II or Cu^II Separation and Recovery from Aqueous Solutions

Drug Delivery Observation of Hydrophobe Ferrofluid and Magnetite Nanoparticals by SPring-8 Synchrotron Radiation

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Magnetite Nanoparticles Surface Coating SiO<sub>2</sub> and Magnetic Properties Evaluation

Cited by 6 publications

References 4 publications

Insights into the Roasting Kinetics and Mechanism of Blast Furnace Slag with Ammonium Sulfate for CO2 Mineralization

Insights into the Roasting Kinetics and Mechanism of Blast Furnace Slag with Ammonium Sulfate for CO2 Mineralization

Modified Superparamagnetic Nanocomposite Microparticles for Highly Selective HgII or CuII Separation and Recovery from Aqueous Solutions

Drug Delivery Observation of Hydrophobe Ferrofluid and Magnetite Nanoparticals by SPring-8 Synchrotron Radiation

Contact Info

Product

Resources

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Insights into the Roasting Kinetics and Mechanism of Blast Furnace Slag with Ammonium Sulfate for CO₂ Mineralization

Insights into the Roasting Kinetics and Mechanism of Blast Furnace Slag with Ammonium Sulfate for CO₂ Mineralization

Modified Superparamagnetic Nanocomposite Microparticles for Highly Selective Hg^II or Cu^II Separation and Recovery from Aqueous Solutions