Graphene Oxides Dispersing and Hosting Graphene Sheets for Unique Nanocomposite Materials

Tian, Leilei; Anilkumar, Parambath; Cao, Li; Kong, Chang Yi; Meziani, Mohammed J.; Qian, Haijun; Veca, L. Monica; Thorne, Tim J.; Tackett, Kenneth N.; Edwards, T.M.; Sun, Ya‐Ping

doi:10.1021/nn200162z

Cited by 89 publications

(73 citation statements)

References 46 publications

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“…[[qv: 21b]],67 However, the dispersion of fluorographene in solvents is crucially important for the solution‐processed fabrication of devices or applications as precursors for electrodes and composites. [[qv: 26b]],[[qv: 26e]],68 Previous studies reported that hydrophobic fluorographene could not be dispersed in ethanol because it has no free p z orbitals to form pseudohydrogen bonds with the hydroxy group of ethanol. [[qv: 13a]] The pseudohydrogen bond has been demonstrated to facilitate the dispersion of graphene with the π bond (abundant free p z orbitals) in ethanol.…”

Section: Propertiesmentioning

confidence: 99%

Two‐Dimensional Fluorinated Graphene: Synthesis, Structures, Properties and Applications

et al. 2016

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Fluorinated graphene, an up‐rising member of the graphene family, combines a two‐dimensional layer‐structure, a wide bandgap, and high stability and attracts significant attention because of its unique nanostructure and carbon–fluorine bonds. Here, we give an extensive review of recent progress on synthetic methods and C–F bonding; additionally, we present the optical, electrical and electronic properties of fluorinated graphene and its electrochemical/biological applications. Fluorinated graphene exhibits various types of C–F bonds (covalent, semi‐ionic, and ionic bonds), tunable F/C ratios, and different configurations controlled by synthetic methods including direct fluorination and exfoliation methods. The relationship between the types/amounts of C–F bonds and specific properties, such as opened bandgap, high thermal and chemical stability, dispersibility, semiconducting/insulating nature, magnetic, self‐lubricating and mechanical properties and thermal conductivity, is discussed comprehensively. By optimizing the C–F bonding character and F/C ratios, fluorinated graphene can be utilized for energy conversion and storage devices, bioapplications, electrochemical sensors and amphiphobicity. Based on current progress, we propose potential problems of fluorinated graphene as well as the future challenge on the synthetic methods and C‐F bonding character. This review will provide guidance for controlling C–F bonds, developing fluorine‐related effects and promoting the application of fluorinated graphene.

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Section: Propertiesmentioning

confidence: 99%

Two‐Dimensional Fluorinated Graphene: Synthesis, Structures, Properties and Applications

et al. 2016

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“…Among these methods, chemical reduction of GO is the most promising approach leading to large-scale production of graphene. Although its effectiveness on the conversion of GO to restore the intrinsic graphene structure is still in debate, there is an emerging realization on the excellent properties of GO for material applications [11]. GO is easily obtained from natural graphite flakes by the strong oxidation and subsequent exfoliation based on the Hummers method [12].…”

Section: Introductionmentioning

confidence: 99%

The effect of graphene oxide (GO) nanoparticles on the processing of epoxy/glass fiber composites using resin infusion

Umer

Dong

et al. 2015

Int J Adv Manuf Technol

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In this paper, the effects of graphene oxide (GO) nanoparticles on glass fiber composite processing by incorporating them into epoxy resin were investigated. GO was synthesized from graphite powder and was mixed with epoxy resin. Three different GO contents of 0.05, 0.1, and 0.2 wt% were used. Epoxy/GO samples were tested for rheology and cure kinetics to evaluate the effects of GO content on important resin infusion processing parameters. The results show that adding GO to neat epoxy resin increased the viscosity and affected the resin cure reaction by reducing the resin gel time. After that, glass fiber composites were prepared using the resin infusion process. Samples with 0.2 wt% GO result in very slow resin infiltration time with premature resin gelation. A 30 % increase in flexural strength and a 21 % increase in flexural modulus are manifested by adding GO as the secondary reinforcement to glass fiber composites.

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“…Second, it is well known that GO film has porous structures, which can provide an efficient path for water supply and vapor flow (22)(23)(24)(25)(26)(27)(28)(29)(30). Third, the crossplane thermal conductivity of GO film is very low (∼0.2 W/mK) (31,32), beneficial for suppressing the parasitic thermal dissipation. Fourth, GO film is highly foldable and can be naturally attached to cellulose (33,34), so that the water pumped by capillary force within the cellulose can be efficiently transferred to GO film.…”

mentioning

confidence: 99%

Graphene oxide-based efficient and scalable solar desalination under one sun with a confined 2D water path

Tang

et al. 2016

Proc. Natl. Acad. Sci. U.S.A.

1,037

744

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Because it is able to produce desalinated water directly using solar energy with minimum carbon footprint, solar steam generation and desalination is considered one of the most important technologies to address the increasingly pressing global water scarcity. Despite tremendous progress in the past few years, efficient solar steam generation and desalination can only be achieved for rather limited water quantity with the assistance of concentrators and thermal insulation, not feasible for large-scale applications. The fundamental paradox is that the conventional design of direct absorber−bulk water contact ensures efficient energy transfer and water supply but also has intrinsic thermal loss through bulk water. Here, enabled by a confined 2D water path, we report an efficient (80% under one-sun illumination) and effective (four orders salinity decrement) solar desalination device. More strikingly, because of minimized heat loss, high efficiency of solar desalination is independent of the water quantity and can be maintained without thermal insulation of the container. A foldable graphene oxide film, fabricated by a scalable process, serves as efficient solar absorbers (>94%), vapor channels, and thermal insulators. With unique structure designs fabricated by scalable processes and high and stable efficiency achieved under normal solar illumination independent of water quantity without any supporting systems, our device represents a concrete step for solar desalination to emerge as a complementary portable and personalized clean water solution.graphene oxide | solar steam | 2D water path | solar desalination | heat localization A s water scarcity (1, 2) becomes one of most pressing global challenges of our time, efficient solar desalination could provide a promising solution to produce clean water directly out of solar energy without extra energy input, particularly urgent for developing countries and remote areas without basic infrastructures (3-5). With rapid development in the past few years (6-16), it is clear that there are two key elements to enable efficient solar desalination: broadband and efficient solar absorption and localized heat management for efficient vapor generation with minimized parasitic thermal loss. So far, significant progress has been made on both of these fronts. Absorbers with various rational designs have been demonstrated with efficient solar absorption (11,14,15). Also, from dispersed particles (6, 7, 16), to porous carbon film (8, 9), to thin metallic absorbers (10,11,14,15), there is a clear trend to confine the absorbed energy in a thinner region for localized heating and more-efficient vapor generation, to minimize dissipated heat to the environment and bulk water. Impressive high-energy transfer efficiency has been achieved, but only for a limited amount of solution, with the assistance of both concentrators and thermal insulation.Efficient and effective solar desalination independent of water quantity under normal one-sun illumination without extra supporting systems will fund...

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Graphene Oxides Dispersing and Hosting Graphene Sheets for Unique Nanocomposite Materials

Cited by 89 publications

References 46 publications

Two‐Dimensional Fluorinated Graphene: Synthesis, Structures, Properties and Applications

Two‐Dimensional Fluorinated Graphene: Synthesis, Structures, Properties and Applications

The effect of graphene oxide (GO) nanoparticles on the processing of epoxy/glass fiber composites using resin infusion

Graphene oxide-based efficient and scalable solar desalination under one sun with a confined 2D water path

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