Effect of exfoliation method on graphite oxide. A comparison between exfoliation by ball milling and sonication in different media

Caicedo, Francy Mayoli Casallas; López, Enrique Vera; Agarwal, Arvind; Drozd, Vadym; Durigin, A.; Wang, Chunlei

doi:10.1088/1742-6596/1386/1/012016

Cited by 3 publications

(2 citation statements)

References 22 publications

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“…Figure 4b exhibits the Raman spectra of the pristine-CNW and CNW/ITO micro-structure. To the best of our knowledge, D (1350 cm −1 ), G (1580 cm −1 ), and 2D (2700 cm −1 ) are the common band of carbon materials, and a high D band and D band (shoulder band) is a unique band that can only be found in defected graphite [18][19][20]. In the Raman spectra of the CNW/ITO micro-structure from Figure 4b, it shows a low I D /I G ratio (1.71) with a low D band than pristine-CNW.…”

Section: Resultsmentioning

confidence: 97%

Wettability of CNW/ITO Micro Structure for Modification of Surface Hydrophilicity

Kwon

Choi

et al. 2019

Applied Sciences

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Although the carbon nanowall is a remarkable material in various fields, it generally shows near hydrophobicity. For modification of hydrophilicity, various modification techniques have been utilized, however, most of the techniques adopted a modification to carbon oxide by chemical processing and plasma treatment, which induce carbon lattice defects, causing the decline of the carbon nanowall quality. While we introduce an eco-friendly modification technique that causes non-defect of carbon lattice and maintains intrinsic carbon nanowall properties by depositing ITO on pristine-carbon nanowall for inducing hydrophilicity. The morphology of carbon nanowall (CNW)/ indium tin oxide (ITO) microstructure was examined by FE-SEM, and the functional group and oxygen components of ITO were investigated by analyzing XPS. The contact angles were measured for wettability analysis according to the surface thickness of ITO.

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Section: Resultsmentioning

confidence: 97%

Wettability of CNW/ITO Micro Structure for Modification of Surface Hydrophilicity

Kwon

Choi

et al. 2019

Applied Sciences

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“…Ball milling has also been investigated to exfoliate graphite oxide. Nevertheless, the quality and the degree of oxidation are highly affected by the solvent, with mainly reduced graphene oxide achieved when using water [52].…”

Section: Graphene Oxidementioning

confidence: 99%

Green Methods for the Fabrication of Graphene Oxide Membranes: From Graphite to Membranes

et al. 2023

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Graphene oxide (GO) has shown great potential as a membrane material due to its unique properties, including high mechanical strength, excellent thermal stability, versatility, tunability, and outperforming molecular sieving capabilities. GO membranes can be used in a wide range of applications, such as water treatment, gas separation, and biological applications. However, the large-scale production of GO membranes currently relies on energy-intensive chemical methods that use hazardous chemicals, leading to safety and environmental concerns. Therefore, more sustainable and greener approaches to GO membrane production are needed. In this review, several strategies proposed so far are analyzed, including a discussion on the use of eco-friendly solvents, green reducing agents, and alternative fabrication techniques, both for the preparation of the GO powders and their assembly in membrane form. The characteristics of these approaches aiming to reduce the environmental impact of GO membrane production while maintaining the performance, functionality, and scalability of the membrane are evaluated. In this context, the purpose of this work is to shed light on green and sustainable routes for GO membranes’ production. Indeed, the development of green approaches for GO membrane production is crucial to ensure its sustainability and promote its widespread use in various industrial application fields.

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Effect of thermal annealing on physical, structural, and performance variation of graphene oxide: A review

Singh

Sharma

et al. 2023

Mod. Phys. Lett. B

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Graphene is a two-dimensional monolayer planar sheet containing carbon atoms that are sp2-bonded to one other and tightly packed in a honeycomb crystal structure. Because of its extraordinary qualities, graphene and its derivatives, such as functionalized graphene, graphene oxide (GO), and reduced graphene oxide (rGO), have attracted substantial attention in a variety of applications. The synthesis of graphene and its derivatives of high quality can be accomplished by the employment of a several different methods. When subjected to various reduction methods, GO and rGO emerge with distinctive sets of properties. These features, in turn, have an impact on the graphene’s overall usefulness and performance. This paper provides an overview of the influence that thermal annealing has on the structural and physical properties of graphene. Following the thermal annealing, GO was converted into rGO, and this allowed for the coherent crystal structure of rGO to be restored. It has been found that the annealing temperature has a direct relationship with the crystallite size. The results of the recorded Raman spectra demonstrate that the degree of imperfection ([Formula: see text] ratio) can sometimes be found to increase while at other times it can be found to decrease. There has not been any conclusive evidence to support either the hypothesis that annealing is employed to polish graphene or the hypothesis that this can lead to changes in doping, defect levels, and strain consequences. Additionally, the impact that thermal annealing has on the functionality and performance variations of rGO has been analyzed and explained. This study concluded with a concise review, a discussion of the challenges faced, and a discussion of the opportunities presented by the graphene.

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Effect of exfoliation method on graphite oxide. A comparison between exfoliation by ball milling and sonication in different media

Cited by 3 publications

References 22 publications

Wettability of CNW/ITO Micro Structure for Modification of Surface Hydrophilicity

Wettability of CNW/ITO Micro Structure for Modification of Surface Hydrophilicity

Green Methods for the Fabrication of Graphene Oxide Membranes: From Graphite to Membranes

Effect of thermal annealing on physical, structural, and performance variation of graphene oxide: A review

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