Vacuum-assisted synthesis of graphene from thermal exfoliation and reduction of graphite oxide

Zhang, Haobin; Wang, Jiwen; Yan, Qing; Zheng, Wenge; Chen, Cao; Yu, Zhong‐Zhen

doi:10.1039/c1jm10099h

Cited by 195 publications

(157 citation statements)

References 38 publications

(67 reference statements)

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“…Here GO was thermally exfoliated and reduced in situ to few layered graphene sheets. 154 Furthermore, a high yield, hydrazine-free method has been reported that produces single-layer high quality HRG sheets at considerably lower temperature and at atmospheric pressure. The reduction of GO by this method was carried out in deionized water at pH ≈ 3 at 95 °C.…”

Section: Thermal Methodsmentioning

confidence: 99%

Graphene based metal and metal oxide nanocomposites: synthesis, properties and their applications

et al. 2015

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Section: Thermal Methodsmentioning

confidence: 99%

Graphene based metal and metal oxide nanocomposites: synthesis, properties and their applications

et al. 2015

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“…One of the aims to prepare GO is to produce graphene-like carbon materials at a large scale by a reduction process [45][46][47][48]. GO reduction is a process that converts sp 3 carbon to sp 2 carbon.…”

Section: Rgomentioning

confidence: 99%

The Preparation of Graphene Oxide and Its Derivatives and Their Application in Bio-Tribological Systems

et al. 2014

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Graphene oxide (GO) can be readily modified for particular applications due to the existence of abundant oxygen-containing functional groups. Graphene oxide-based materials (GOBMs), which are biocompatible and hydrophilic, have wide potential applications in biomedical engineering and biotechnology. In this review, the preparation and characterization of GO and its derivatives are discussed at first. Subsequently, the biocompatibility and tribological behavior of GOBMs are reviewed. Finally, the applications of GOBMs as lubricants in bio-tribological systems are discussed in detail.

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“…Despite the low-temperature reduction process used here, these absorption capacities for oils and organic solvents are considerably higher than those in various carbon-based 3D architectures [1][2][3][5][6][7], except for the high-temperature-processed ultralight N-doped graphene frameworks [4]. Differently from the previous studies on the carbon-based sorbents with the ployed to produce porous graphene-based materials on a large scale [3][4][5][6][10][11][12].…”

Section: Absorption Capacitiesmentioning

confidence: 39%

“…The C/O ratios of the thermally reduced samples as a function of reduction time (Fig. 2c) are slightly higher than the typical C/O ratio of GO (<4 for an empirical definition of GO); however, they are considerably lower than those prepared by other reduction methods [10,[17][18][19][20]. Considering that the saturated absorption values of the thermally reduced samples (for the heating time of 1 h) were observed at the C/O ratio of 4.32, it is worth noting that the removal of hydroxyl groups on the slightly reduced GO sorbents is critical for achieving their maximum capacities, which is greater than those of other carbon-based macrostructures [1][2][3][5][6][7].…”

Section: Preparation Of Rgo-based Sorbentsmentioning

confidence: 93%

“…As shown in the C 1 s spectra (Fig. 2a), GO presents four carbon atomic components with a considerable degree of oxidation (sp 2 hybridized carbon, 284.5 eV; the C in C-O bond, 286.3 eV; the carbonyl C in C=O bond, 287.5 eV; and the carboxylate C in O-C=O bond, 289.1 eV) [10,13]. By prolonging the heating time to 10 h, the degree of oxidation gradually decreases, increasing the C/O ratio from 2.22 (of GO) to 4.92 for the thermally reduced sample.…”

Section: Surface Chemistry Of 3d Macroporous Srgo-based Sorbentsmentioning

confidence: 99%

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Sorption behavior of slightly reduced, three-dimensionally macroporous graphene oxides for physical loading of oils and organic solvents

Park¹,

Kang²

2016

Carbon letters

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High pollutant-loading capacities (up to 319 times its own weight) are achieved by threedimensional (3D) macroporous, slightly reduced graphene oxide (srGO) sorbents, which are prepared through ice-templating and consecutive thermal reduction. The reduction of the srGO is readily controlled by heating time under a mild condition (at 1 10 -2 Torr and 200°C). The saturated sorption capacity of the hydrophilic srGO sorbent (thermally reduced for 1 h) could not be improved further even though the samples were reduced for 10 h to achieve the hydrophobic surface. The large meso-and macroporosity of the srGO sorbent, which is achieved by removing the residual water and the hydroxyl groups, is crucial for achieving the enhanced capacity. In particular, a systematic study on absorption parameters indicates that the open porosity of the 3D srGO sorbents significantly contributes to the physical loading of oils and organic solvents on the hydrophilic surface. Therefore, this study provides insight into the absorption behavior of highly macroporous graphene-based macrostructures and hence paves the way to development of promising next-generation sorbents for removal of oils and organic solvent pollutants.

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Vacuum-assisted synthesis of graphene from thermal exfoliation and reduction of graphite oxide

Cited by 195 publications

References 38 publications

Graphene based metal and metal oxide nanocomposites: synthesis, properties and their applications

Graphene based metal and metal oxide nanocomposites: synthesis, properties and their applications

The Preparation of Graphene Oxide and Its Derivatives and Their Application in Bio-Tribological Systems

Sorption behavior of slightly reduced, three-dimensionally macroporous graphene oxides for physical loading of oils and organic solvents

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