Graphite oxide swelling in molten sugar alcohols and their aqueous solutions

Klechikov, Alexey; You, Shujie; Lackner, Lukas; Sun, Jinhua; Iakunkov, Artem; Ребрикова, А.Т.; Korobov, M.V.; Baburin, Igor A.; Seifert, Gotthard; Talyzin, Alexandr V.

doi:10.1016/j.carbon.2018.08.033

Cited by 16 publications

(10 citation statements)

References 65 publications

(87 reference statements)

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“…Swelling of GO membranes is directly related to the size of “permeation channels” provided by the interlayer space, which enable diffusion of solvents and solutions. The interlayer distance of the GO structure is typically studied using X-ray diffraction (XRD), ,, direct measurements of film/membrane thickness, or quantitative evaluation of solvent vapor sorption. ,, Simultaneous evaluation of GO film thickness and the amount of adsorbed solvent can be performed using neutron reflectivity (NR) methods. , …”

Section: Introductionmentioning

confidence: 99%

Intercalation of Dyes in Graphene Oxide Thin Films and Membranes

et al. 2021

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Intercalation of dyes into thin multilayered graphene oxide (GO) films was studied by neutron reflectivity and X-ray diffraction. Methylene blue (MB) penetrates the interlayer space of GO in ethanol solution and remains intercalated after the solvent evaporation, as revealed by the expansion of the interlayer lattice and change in chemical composition. The sorption of MB by thin GO films is found to be significantly stronger compared to the sorption of Crystal violet (CV) and Rose bengal (RB). This effect is attributed to the difference in the geometrical shape of planar MB and essentially nonflat CV and RB molecules. Graphite oxides and restacked GO films are found to exhibit different methylene blue (MB) sorptions. MB sorption by precursor graphite oxide and thin spin-coated films of GO is significantly stronger compared to freestanding micrometer-thick membranes prepared by vacuum filtration. Nevertheless, the sorption capacity of GO membranes is sufficient to remove a significant part of the MB from diluted solutions tested for permeation in several earlier studies. High sorption capacity results in strong modification of the GO structure, which is likely to affect permeation properties of GO membranes. Therefore, MB is not suitable for testing size exclusion effects in the permeation of GO membranes. It is not only hydration or solvation diameter but also the exact geometrical shape of molecules that needs to be taken into account considering size effects for penetration of molecules between GO layers in membrane applications.

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Section: Introductionmentioning

confidence: 99%

Intercalation of Dyes in Graphene Oxide Thin Films and Membranes

et al. 2021

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“…[18][19][20] Swelling of GO membranes is directly related to the size of "permeation channels" which enable diffusion of solvents and solutions. The interlayer distance of GO structures is typically studied using X-ray diffraction (XRD), 14,21,22 direct measurement of lm/membrane thickness 23 or quantitative evaluation of solvent vapor sorption. [24][25][26] Simultaneous evaluation of multilayered GO lm thickness and amount of sorbed solvent can be performed using Neutron Reectivity (NR) methods.…”

Section: Introductionmentioning

confidence: 99%

Swelling of graphene oxide membranes in alcohols: effects of molecule size and air ageing

et al. 2019

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“…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%