Amorphous structural models for graphene oxides

Liu, Lizhao; Wang, Lu; Gao, Junfeng; Zhao, Jijun; Gao, Xingfa; Chen, Zhongfang

doi:10.1016/j.carbon.2011.12.014

Cited by 118 publications

(85 citation statements)

References 74 publications

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“…Since this statement is in fair agreement of the observation we had in high-resolution STEM (see Sect. 1.4.2 ) as well as other reports [ 66 ], we consider this new statement regarding GO structure is worth of further investigation.…”

Section: Chemical Structurementioning

confidence: 69%

Synthesis, Structure, and Characterizations

Gao

2015

Graphene Oxide

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This chapter introduces a peculiar organic macromolecule previously named as graphitic acid, graphite oxide (GO), or more recently, graphene oxide (GO). It is basically a wrinkled two-dimensional carbon sheet with various oxygenated functional groups on its basal planes and peripheries, with the thickness around 1 nm and lateral dimensions varying between a few nanometers to several microns. It was fi rst prepared by the British chemist B. C. Brodie in 1859 and became very popular in the scientifi c community during the last decade, simply because it was believed to be an important precursor to graphene (a single atomic layer of graphite, the discovery of which won Andre Geim and Konstantin Novoselov the 2010 Nobel Prize in Physics). Several strategies have been introduced to reduce GO back to graphene; however, in this chapter we will mainly focus on GO itself and, more relevantly, its synthesis, chemical structure, and general characterizations. We emphasize here that, despite its strong relevance to graphene, GO also has its own scientifi c signifi cance as a basic form of oxidized carbon and technological importance as a platform for all kinds of derivatives and composites that have already demonstrated various interesting applications.

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Section: Chemical Structurementioning

confidence: 69%

Synthesis, Structure, and Characterizations

Gao

2015

Graphene Oxide

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“…We have performed the calculations for DOLS by utilizing first-principles density functional theory (DFT) [36,37]. In a previous study, Wang et al [38] determined the energy diagram of GO with the first-principles theory.…”

Section: Resultsmentioning

confidence: 99%

Imaging and spectrum of monolayer graphene oxide in external electric field

Gao

Qin

Qiao

et al. 2015

Carbon

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“…Moreover, the well separated heptagons and pentagons result in local curvature around the defects with a large inflection angle of 72°. Since the GB is a local defect, the induced band gap would only affect the local electronic states of the polycrystalline graphene flake and its amplitude is not as large as that due to chemical functionalization [19,57]. Although only two GBs isomers were found to open the band gap of graphene, we anticipate that some other GBs may also have the possibility to induce a band gap.…”

Section: Electronic and Transport Properties Of Graphene Gbsmentioning

confidence: 91%

“…Based on our previous theoretical studies [49,57], two series of GO structural models with different OH:O ratios and coverages were considered, i.e., R of 25% (C 48 First, the electronic structures of those stable GO were investigated using DFT calculations. As presented in Table 2, the band gap of GO calculated by HSE06 is widened from 0 to 4.13 eV with increasing coverage of hydroxyl, epoxy, or both the groups.…”

Section: Photocatalytic Applicationsmentioning

confidence: 99%