Simple and scalable route for the ‘bottom-up’ synthesis of few-layer graphene platelets and thin films

Herron, Christopher R.; Coleman, Karl S.; Edwards, Rebecca S.; Mendis, Budhika G.

doi:10.1039/c0jm03437a

Cited by 56 publications

(30 citation statements)

References 32 publications

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“…Obtained certain D‐band (1350 cm −1 ) and G‐band (1580 cm −1 ) in the Raman spectra of S‐GEs are related with the bond stretching of all couples of atoms consisting of sp 2 hybridization in both rings and the breathing modes of atoms in rings consisting of sp 2 hybridization, respectively . The rate of I G / I D gives information about the optical transparency of graphene‐based materials . These values were calculated as 1.06, 1.08, 1.04 and 0.88 for S1‐GE30, S2‐GE50, S3‐GE50 and S4‐GE50, respectively.…”

Section: Resultsmentioning

confidence: 99%

A two‐dimensional material for high capacity supercapacitors: S‐doped graphene

2019

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Summary In this work, sulfur‐doped graphene‐coated electrodes are prepared by cyclic voltammetry in different potential ranges and different cycles (from 10 to 50) for selective modification of electrodes by different functional groups. The prepared electrodes are characterized by spectroscopic, microscopic and electrochemical methods. In scanning electron microscopic analysis, formation of graphene layers and their porous structure have been determined. Electrochemical impedance spectroscopic and cyclic voltammetric analyses are also used in electrochemical characterization of the electrodes. Then, the prepared sulfur‐doped graphene‐coated electrodes by using cyclic voltammetry in one‐step and low cost are used as electrode materials of supercapacitor for the first time in the literature. Since the mesoporous structure of the electrodes prepared in lower potential ranges increases, specific capacitance of the electrodes increases from 74 to 1833 mF cm−2 with 10 mA cm−2 current density. This result shows that specific capacitances of prepared electrodes are higher than those of the electrodes prepared with metal‐doped in the literature.

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Section: Resultsmentioning

confidence: 99%

A two‐dimensional material for high capacity supercapacitors: S‐doped graphene

2019

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“…Graphene produced using CVD is a promising material that can used in a number of applications such as coatings, transparent electrodes, sensors or electronic devices, although it cannot be produced at the moment in large enough quantities for use in nanocomposites. Attempts are currently being made for the production of high-quality, few-layer graphene in bulk quantities by CVD [65][66][67]. Such a process could revolutionize the production of graphene-based nanocomposites and give a massive boost to the whole area of graphene-reinforced nanocomposite materials.…”

Section: A C C E P T E D Accepted Manuscriptmentioning

confidence: 99%

Graphene/elastomer nanocomposites

Papageorgiou

Kinloch

Young

2015

Carbon

334

201

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In the decade since the first isolation and identification of graphene, the scientific community is still finding ways to utilize its unique properties. The present review deals with the preparation and physicochemical characterization of graphene-based elastomeric nanocomposites. The processing and characterization of graphene and graphene oxide are described in detail, since the presence of such fillers in an elastomeric matrix affects dramatically the properties of the nanocomposite samples. Several preparation routes for the efficient dispersion of graphene in elastomers are then discussed, while aspects such as the interfacial bonding between the filler and the matrix or interactions between the fillers have been thoroughly analysed. Different types of graphene/elastomer nanocomposites are described in terms of their manufacture and properties and it has been shown that depending on the type of graphene employed and the preparation methods, the mechanical, thermal, electrical and barrier properties of the elastomeric matrix can be enhanced due to the presence of graphene, even at relatively-low filler loadings. In most cases, the formation of a filler network can play a major role in the improvement of the overall performance of the material.

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“…These methods can either be 1) top-down: consisting of the exfoliation of natural or synthetic graphite to single or few layers graphene [4] or 2) bottom-up: consisting of a chemical vapor deposition (CVD) growth of graphene onto metal catalyst substrates. [5] The top-down approach is cost-effective, offers the possibility of a large-scale production, and is preferred when graphene and other graphene-based materials are adopted to fabricate new electrode materials for high-performance sensing and energy storage devices. [6] The starting material used in the top-down method is typically graphite, which is available at low cost and in large quantities.…”

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confidence: 99%