The attachment of Fe3O4 nanoparticles to graphene oxide by covalent bonding

He, Fu‐An; Fan, Jintu; Ma, Dong; Zhang, Liming; Leung, Chi Wah; Chan, Helen L. W.

doi:10.1016/j.carbon.2010.04.052

Cited by 436 publications

(236 citation statements)

References 38 publications

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“…Although the coprecipitation [33,34] and chemical grafting [35,36] methods have been used under relatively mild conditions (∼80°C reaction temperature), the presence of bases at elevated temperatures inevitably results in partial deoxygenation of the GO framework [37,38]. Another, more viable strategy is the preliminary functionalization of the magnetite nanoparticles [39], sulfonation of graphene oxide [40], or derivatization of both constituents by coupling azide-modified MNPs with alkyne-functionalized GO as reported by Namvari and Namazi [41].…”

Section: Introductionmentioning

confidence: 99%

A Simple and Scalable Method for the Preparation of Magnetite/Graphene Oxide Nanocomposites under Mild Conditions

Szabó

Nánai

Nesztor

et al. 2018

Advances in Materials Science and Engineering

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Nanostructured composite dispersions containing magnetic nanoparticles (MNPs) and graphene oxide (GO) lamellae have been prepared by a simple and easily scalable room temperature procedure. We show that, owing to the enormous surface area and negative surface charge developed in aqueous GO suspensions, large amounts of positively charged MNPs can be electrostatically attached to the layered host. is procedure is superior to many previous synthesis pathways because it exploits the chargeregulated adhesion of naked MNPs to GO resulting in the formation of stable and uniform nanocomposite materials in a wide composition range without any preliminary functionalization steps or harsh conditions that may lead to chemical degradation of the graphene-based nanosheets.

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Section: Introductionmentioning

confidence: 99%

A Simple and Scalable Method for the Preparation of Magnetite/Graphene Oxide Nanocomposites under Mild Conditions

Szabó

Nánai

Nesztor

et al. 2018

Advances in Materials Science and Engineering

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“…After modification, the magnetic iron oxide particles (with diameters of about 30-100 nm) have successfully anchored onto GO sheets and tend to grow on the defects and edges of GO sheets (Figure 3c,d). This is because most of the carboxylic groups formed at the edge of GO sheet and the iron oxide particles would grow preferentially to the carboxylic groups [27]. Like the SEM observation, the TEM micrographs of GO shows a two-dimensional wrinkled morphology (Figure 4a) with an amorphous structure (Figure 4b).…”

Section: Morphology and Composition Of Go@fe 3 Omentioning

confidence: 72%

Effects of Graphene-Oxide-Modified Coating on the Properties of Carbon-Fiber-Reinforced Polypropylene Composites

Bowman

Qiu

et al. 2018

Coatings

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Graphene oxide (GO) modified with ferrites (GO@Fe 3 O 4 ) were studied to determine their effect on the interfacial properties of continuous carbon-fiber-reinforced thermoplastic composites. The GO@Fe 3 O 4 were introduced by mixing them directly in an acrylic-styrene (AS) sizing emulsion suitable for the making of continuous carbon-fiber-reinforced thermoplastics and towpregs. A magnetic field was then generated during the online sizing using coils in order to change the morphology of the coating on the fiber. The effect on the obtained sizing quality and final properties of continuous carbon-fiber-reinforced thermoplastic composites was then studied. The results showed that the topography of the sized fibers was modified, showing a kind of "drag" effect and more than a 32% increase was obtained for interlaminar shear strength.

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“…To enhance their solubility and improve the quality of GTiO 2 Ns composites, before mixing, TiO 2 NPs and/or graphene sheets can be functionalized by covalent C-C coupling [59,161] or non-covalent π-π stacking reactions [162]. For example, Morawski et al [163] prepared a visible light-active TiO 2 -reduced GO photocatalyst by mechanically mixing TiO 2 with an appropriate mass ratio of reduced GO in 1-butyl alcohol and successive ultrasonication.…”

Section: Preparation Methods Of Gtio 2 Nsmentioning

confidence: 99%

Recent Advances in Graphene Based TiO2 Nanocomposites (GTiO2Ns) for Photocatalytic Degradation of Synthetic Dyes

et al. 2017

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Synthetic dyes are widely used in textile, paper, food, cosmetic, and pharmaceutical industries. During industrial processes, some of these dyes are released into the wastewater and their successive release into rivers and lakes produces serious environmental problems. TiO 2 is one of the most widely studied and used photocatalysts for environmental remediation. However, it is mainly active under UV-light irradiation due to its band gap of 3.2 eV, while it shows low efficiency under the visible light spectrum. Regarding the exploration of TiO 2 activation in the visible light region of the total solar spectrum, the incorporation of carbon nanomaterials, such as graphene, in order to form carbon-TiO 2 composites is a promising area. Graphene, in fact, has a large surface area which makes it a good adsorbent for organic pollutants removal through the combination of electrostatic attraction and π-π interaction. Furthermore, it has a high electron mobility and therefore it reduces the electron-hole pair recombination, improving the photocatalytic activity of the semiconductor. In recent years, there was an increasing interest in the preparation of graphene-based TiO 2 photocatalysts. The present short review describes the recent advances in TiO 2 photocatalyst coupling with graphene materials with the aim of extending the light absorption of TiO 2 from UV wavelengths into the visible region, focusing on recent progress in the design and applications in the photocatalytic degradation of synthetic dyes.

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The attachment of Fe3O4 nanoparticles to graphene oxide by covalent bonding

Cited by 436 publications

References 38 publications

A Simple and Scalable Method for the Preparation of Magnetite/Graphene Oxide Nanocomposites under Mild Conditions

A Simple and Scalable Method for the Preparation of Magnetite/Graphene Oxide Nanocomposites under Mild Conditions

Effects of Graphene-Oxide-Modified Coating on the Properties of Carbon-Fiber-Reinforced Polypropylene Composites

Recent Advances in Graphene Based TiO2 Nanocomposites (GTiO2Ns) for Photocatalytic Degradation of Synthetic Dyes

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