Synthesis of few-layer graphene by lamp ablation

Lu, Haibo; Woi, Wei Sheong; Xunyan, Tan; Gibson, Christopher T.; Chen, Xianjue; Raston, Colin L.; Gordon, Jeffrey M.; Chua, Hui Tong

doi:10.1016/j.carbon.2015.07.004

Cited by 12 publications

(3 citation statements)

References 15 publications

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“…31 The microstructures and morphological information on exfoliated graphene using electron microscopic studies are shown in Figure 4a shows the FEGSEM image of exfoliated graphene; it can be seen the sheets are randomly crumpled with a plane, the smooth and thin-layered structure having the lateral dimensions of a few hundred nanometers. 28 This confirms the exfoliation of the natural graphite (highly well ordered thicklayered structure) into exfoliated graphene by the high-pressure force. The morphological investigation by TEM study revealed the presence of graphene sheets as shown in Figure 4b.…”

Section: ■ Results and Discussionsupporting

confidence: 66%

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Novel High Pressure Exfoliated Graphene-Based Semitransparent Stable DSSCs for Building Integrated Photovoltaics

Nemala

Kartikay

Aneja

et al. 2018

ACS Appl. Energy Mater.

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Integrating dye-sensitized solar cells (DSSCs) with a building’s architecture is required for its commercialization. Coupling semitransparent designer DSSCs with windows has the dual benefit of providing daylighting and power generation. To achieve this, we report a low-cost, novel, high-pressure exfoliation technique for graphene and utilize it as a transparent counter electrode for fabrication of semitransparent DSSCs. By adopting environmentally friendly and economic exfoliated graphene instead of conventional platinum, the overall device cost comes down. The electrocatalytic behavior of fabricated transparent graphene counter electrode was assessed using cyclic voltammetry, Tafel plot in symmetry cell configuration, and impedance spectroscopy. We have fabricated DSSC with >70% transmittance in the visible spectrum, which gives promising power conversion efficiency of 3.19%. The fabricated cells were stable for more than 500 h under constant illumination with no significant efficiency drop. Also, we have fabricated designer semitransparent DSSCs using various symbols.

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Section: ■ Results and Discussionsupporting

confidence: 66%

“…The intensity ratio of D and G bands is evaluated as 0.72 for exfoliated graphene, much higher than that of natural graphite (0.06), which clearly features the exfoliation of graphite. 17,28 Various parameters of Raman spectra of ex Gr in comparison with natural graphite are tabulated in Table 1.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Novel High Pressure Exfoliated Graphene-Based Semitransparent Stable DSSCs for Building Integrated Photovoltaics

Nemala

Kartikay

Aneja

et al. 2018

ACS Appl. Energy Mater.

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“…Mechanism of bottom-up process proceeds in two steps; C-radicals production by decomposition of a carbon precursor until the amount of solved C is saturated and the sublimation of C atoms [7]. Various starting materials are used in bottom-up processes such as; rice husks [8], fenugreek seeds [9], melamine [10], hibiscus flower petals [11], camphor [12], polyaniline [13], urea [14], humanin [15], alfaalfa plants [16], petroleum asphalt [17]. Using glucose as a carbon source for synthesizing of graphene in molten salt media was previously reported by Liu et al [1].…”

Section: Introductionmentioning

confidence: 99%

One Step Synthesis of Graphene-Like Structures by Carbonization of some Carbohydrates in Molten Salt Media

Gürünlü

2019

JNanoR

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Graphene is one of the most promising materials discovered in last years. It is usually synthesized by Hummers’ method requiring the usage of many chemicals. As an alternative to traditional methods, in this study a bottom-up synthesis method was developed from various saccharides such as starch, mannose, cellulose, fructose, arabinose, and xylose by carbonization at 600 °C to 800 °C in LiCl/KCl molten salt system. The proposed method is environmental friendly and economic. Graphene yields at 600 °C are higher than at 800 °C. Graphene products give peak at 2θ = 23° on the X-Ray Diffraction (XRD) patterns. As the temperature is increased, amorph structure is observed on the XRD patterns. Raman spectroscopy results show that intensity of D band peak over intensity of G band peak (ID/IG) values of graphene products synthesized from arabinose and cellulose at 600 °C, graphene from arabinose synthesized at 800 °C are 0.76, 0.65 and 0.85 respectively, which show that these products are few-layered. According to X-ray photoelectron spectroscopy (XPS) results, graphene products synthesized at 600 °C have higher carbon content than those synthesized at 800 °C.

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Graphene Applications in Biosensors and Diagnostics

Arvinte¹,

Sesay

2017

Biosensors and Nanotechnology

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Synthesis of few-layer graphene by lamp ablation

Cited by 12 publications

References 15 publications

Novel High Pressure Exfoliated Graphene-Based Semitransparent Stable DSSCs for Building Integrated Photovoltaics

Novel High Pressure Exfoliated Graphene-Based Semitransparent Stable DSSCs for Building Integrated Photovoltaics

One Step Synthesis of Graphene-Like Structures by Carbonization of some Carbohydrates in Molten Salt Media

Graphene Applications in Biosensors and Diagnostics

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