Preparation and characterization of graphene and Ni-decorated graphene using flower petals as the precursor material

Ray, Ajoy Kumar; Sahu, Ranjan K.; Rajinikanth, V.; Bapari, Himangshu; Ghosh, Mainak; Paul, Parimal

doi:10.1016/j.carbon.2012.04.060

Cited by 68 publications

(33 citation statements)

References 29 publications

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“…The XPS of Chemical Vapor Deposited Graphene (CVD-G) was reported by Ray et al [21] and the XPS of Multiwall Carbon Nanotubes (MWCNT) by An et al [22]. [21]; An et al [22]; Perrozzi et al [20]; Mattevi et al [17]; Stobinski et al [16];…”

Section: An Important Step In This Direction Has Recently Been Taken mentioning

confidence: 98%

“…These XPS analyses include those by Stobinski et al [16], Mattevi et al [17], Poh et al [18], Jankovsky et al [19] and Perrozzi et al [20]. The XPS of Chemical Vapor Deposited Graphene (CVD-G) was reported by Ray et al [21] and the XPS of Multiwall Carbon Nanotubes (MWCNT) by An et al [22]. [21]; An et al [22]; Perrozzi et al [20]; Mattevi et al [17]; Stobinski et al [16];…”

Section: An Important Step In This Direction Has Recently Been Taken mentioning

confidence: 98%

“…O/Cfit calculated after the digitalization of published data with APV fit. Source of data: Ray[21]; An[22]; Perrozzi[20];…”

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confidence: 99%

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Accurate chemical analysis of oxygenated graphene-based materials using X-ray photoelectron spectroscopy

Kovtun

Jones

Dell’Elce

et al. 2019

Carbon

237

121

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A simple, fast and general protocol for quantitative analysis of X-ray photoelectron spectroscopy (XPS) data provides accurate estimations of chemical species in graphene and related materials (GRMs). XPS data are commonly used to estimate the quality of and defects in graphene and graphene oxide (GO), by comparing carbon and oxygen 1s XPS peaks, obtaining an O/C ratio. This approach, however, cannot be used in the presence of extraneous oxygen contamination. The protocol, based on quantitative line-shape analysis of C 1s signals, uses asymmetric pseudo-Voigt line-shapes (APV), in contrast to Gaussian-based approaches conventionally used in fitting XPS spectra, thus allowing better accuracy in quantifying C 1s contributions from graphitic carbon (sp 2), defects (sp 3 carbon), carbons bonded to hydroxyl and epoxy groups, and from carbonyl and carboxyl groups. The APV protocol was evaluated on GRMs with O/C ratios ranging from 0.02 to 0.30 with film thicknesses from monolayers to bulk-like (>30nm) layers and also applied to previously published data, showing better results compared to those from conventional XPS fitting protocols. Based uniquely on C 1s data, the APV protocol can quantify O/C ratio and the presence of specific functional groups in GRMs even on SiOx, substrates, or in samples containing water.

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Section: An Important Step In This Direction Has Recently Been Taken mentioning

confidence: 98%

Section: An Important Step In This Direction Has Recently Been Taken mentioning

confidence: 98%

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Accurate chemical analysis of oxygenated graphene-based materials using X-ray photoelectron spectroscopy

Kovtun

Jones

Dell’Elce

et al. 2019

Carbon

237

121

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“…Interestingly, the reducing sugars (such as glucose, fructose and sucrose) can not only chemically convert the exfoliated GO to GNS, but also can be used as precursor to synthesize the graphene . Furthermore, the graphene‐like materials could also form through thermal treatment of other organic matter from natural resources such as chitosan, oil palm fruit bunch, and flower petals in the absence of oxygen. In addition, the waste plastics or polypropylene could be also utilized as precursor to produce porous graphene through thermal treatment at relatively low temperature (<800 °C) .…”

Section: Synthesis Of Graphene and Their Composite Photocatalystsmentioning

confidence: 99%

Graphene in Photocatalysis: A Review

Wageh

et al. 2016

Small

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In recent years, heterogeneous photocatalysis has received much research interest because of its powerful potential applications in tackling many important energy and environmental challenges at a global level in an economically sustainable manner. Due to their unique optical, electrical, and physicochemical properties, various 2D graphene nanosheets-supported semiconductor composite photocatalysts have been widely constructed and applied in different photocatalytic fields. In this review, fundamental mechanisms of heterogeneous photocatalysis, including thermodynamic and kinetics requirements, are first systematically summarized. Then, the photocatalysis-related properties of graphene and its derivatives, and design rules and synthesis methods of graphene-based composites are highlighted. Importantly, different design strategies, including doping and sensitization of semiconductors by graphene, improving electrical conductivity of graphene, increasing eloectrocatalytic active sites on graphene, strengthening interface coupling between semiconductors and graphene, fabricating micro/nano architectures, constructing multi-junction nanocomposites, enhancing photostability of semiconductors, and utilizing the synergistic effect of various modification strategies, are thoroughly summarized. The important applications including photocatalytic pollutant degradation, H production, and CO reduction are also addressed. Through reviewing the significant advances on this topic, it may provide new opportunities for designing highly efficient 2D graphene-based photocatalysts for various applications in photocatalysis and other fields, such as solar cells, thermal catalysis, separation, and purification.

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“…and hence may not be very environment friendly. The authors of this article have recently developed [52,53] a method for synthesis of graphene from nature using flower petals as carbon feedstock.…”

Section: /47mentioning

confidence: 99%