Measurement of Graphitic Acid Surface with Polar Molecules

Pino, C. Del; Ramírez, Antonio Avalos; Cano-Ruiz, J.

doi:10.1038/209906c0

Cited by 4 publications

(4 citation statements)

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“…Brodie GO immersed in excess of water showed an increase in d(001) by ∼2 Å upon compression up to the point of water solidification (1.4 GPa), see the inset Intercalation. Amines n-Propylamine 13.0 Å, 196 16.1 Å 161 20.3 Å 161 n-Butylamine 8.3 Å-13.6 Å, 170,178,200 15.0 Å, 175 16.0-16.8 Å, 93,196 18.1 Å, 161 19.5 Å 183 10.0 Å, 190 11.8 Å, 194 This article is licensed under a Creative Commons Attribution 3.0 Unported Licence.…”

Section: Swelling Of Graphite Oxides In Watermentioning

confidence: 99%

“…Swelling in organic solvents. The interlayer distance at ambient temperature for Brodie and Hummers graphite oxides -5.9 Å, 161,163-166 6.2-7.4 Å,93,97,99,111,130,162,[167][168][169][170][171][172][173][174][175][176][177][178][179][180][181][182] 7.8 Å 183 6.4-6.9 Å,21,161,164 7.2-8.3 Å,58,97,127,177,[184][185][186][187][188][189][190] 8.6-9.0 Å[191][192][193][194] …”

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confidence: 99%

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Swelling properties of graphite oxides and graphene oxide multilayered materials

Iakunkov

Talyzin

2020

Nanoscale

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Section: Swelling Of Graphite Oxides In Watermentioning

confidence: 99%

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confidence: 99%

Swelling properties of graphite oxides and graphene oxide multilayered materials

Iakunkov

Talyzin

2020

Nanoscale

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“…15,25,29,31,32 However, a careful literature search reveals that several extensive studies of GO swelling in a variety of alcohols were performed in the 1950s and 60s. 24,33 These studies seem to be undeservingly forgotten, while the reported anomalies are not currently understood. Swelling of GO in alcohols with progressively larger sizes of molecules (up to 18 carbon atoms) was demonstrated to result in an increase in the interlayer distance of GO of up to ∼50 Å.…”

Section: Introductionmentioning

confidence: 99%

Multilayered intercalation of 1-octanol into Brodie graphite oxide

et al. 2017

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Multilayered intercalation of 1-octanol into the structure of Brodie graphite oxide (B-GO) was studied as a function of temperature and pressure. Reversible phase transition with the addition/removal of one layer of 1-octanol was found at 265 K by means of X-ray Diffraction (XRD) and Differential Scanning Calorimetry (DSC). The same transition was observed at ambient temperature upon a pressure increase above 0.6 GPa. This transition was interpreted as an incongruent melting of the low temperature/high pressure B-GO intercalated structure with five layers of 1-octanol parallel to GO sheets (L-solvate), resulting in the formation of a four-layered structure that is stable under ambient conditions (A-solvate). Vacuum heating allows the removal of 1-octanol from the A-solvate layer by layer, while distinct sets of (00l) reflections are observed for three-, two-, and one-layered solvate phases. Step by step removal of the 1-octanol layers results in changes of distance between graphene oxide planes by ∼4.5 Å. This experiment proved that both L- and A-solvates are structures with layers of 1-octanol parallel to GO planes. Unusual intercalation with up to five distinct layers of 1-octanol is remarkably different from the behaviour of small alcohol molecules (methanol and ethanol), which intercalate B-GO structure with only one layer under ambient conditions and a maximum of two layers at lower temperatures or higher pressures. The data presented in this study make it possible to rule out a change in the orientation of alcohol molecules from parallel to perpendicular to the GO planes, as suggested in the 1960s to explain larger expansion of the GO lattice due to swelling with larger alcohols.

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“…short and long chain alcohols, [50][51] glycols, [52] various kind of amines, [53][54] amides, [54] ketones. [52,54] The common feature of all these solvents is that they are liquid at ambient conditions. Swelling occurs rather rapidly when GO is immersed into liquid solvent, but solvents evaporate at least partly once the GO is exposed to ambient air conditions.…”

Section: Introductionmentioning

confidence: 99%