Clay-graphene oxide liquid crystals and their aerogels: Synthesis, characterization and properties

Sisi Ye; Zhihong Yang; Jianmei Xu; Zehao Shang; Jing Xie

doi:10.1098/rsos.181439

Clay-graphene oxide liquid crystals and their aerogels: Synthesis, characterization and properties

Sisi Ye, Zhihong Yang^*, Jianmei Xu, Zehao Shang, Jing Xie

^*Corresponding author for this work

China University of Geosciences, Wuhan

Research output: Contribution to journal › Article › peer-review

12 Citations (Scopus)

Abstract

The dispersions containing two kinds of layered solids-graphene oxide (GO) and exfoliated montmorillonite (MMT) were mainly prepared, following which the binary aerogels were synthesized. The results indicate that the formation of liquid crystals (LCs) occurs at lower GO concentration and the birefringence becomes stronger when MMT is introduced into GO dispersion. Sol - gel transition forms in the binary suspensions with different mass fractions of MMT and GO. LCs with highly ordered alignment are observed in the gel and the fraction of LCs obviously increases with the increase in GO concentration. Moreover, the birefringence is observed in MMT - GO binary aerogels with the interconnected three-dimensional porous network, which is attributed to the ordered arrangement of MMT and GO nanosheets in pore walls. Among the aerogels with different MMT/GO ratios, the samples at the ratio of 10: 1 show better adsorption capacity and removal percentage of cationic and anionic dyes.

Original language	English
Article number	181439
Journal	Royal Society Open Science
Volume	6
Issue number	2
DOIs	https://doi.org/10.1098/rsos.181439
Publication status	Published - 1 Feb 2019
Externally published	Yes

Keywords

Aerogel
Graphene oxide
Liquid crystals
Montmorillonite

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title = "Clay-graphene oxide liquid crystals and their aerogels: Synthesis, characterization and properties",

abstract = "The dispersions containing two kinds of layered solids-graphene oxide (GO) and exfoliated montmorillonite (MMT) were mainly prepared, following which the binary aerogels were synthesized. The results indicate that the formation of liquid crystals (LCs) occurs at lower GO concentration and the birefringence becomes stronger when MMT is introduced into GO dispersion. Sol - gel transition forms in the binary suspensions with different mass fractions of MMT and GO. LCs with highly ordered alignment are observed in the gel and the fraction of LCs obviously increases with the increase in GO concentration. Moreover, the birefringence is observed in MMT - GO binary aerogels with the interconnected three-dimensional porous network, which is attributed to the ordered arrangement of MMT and GO nanosheets in pore walls. Among the aerogels with different MMT/GO ratios, the samples at the ratio of 10: 1 show better adsorption capacity and removal percentage of cationic and anionic dyes.",

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author = "Sisi Ye and Zhihong Yang and Jianmei Xu and Zehao Shang and Jing Xie",

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T2 - Synthesis, characterization and properties

AU - Ye, Sisi

AU - Yang, Zhihong

AU - Xu, Jianmei

AU - Shang, Zehao

AU - Xie, Jing

PY - 2019/2/1

Y1 - 2019/2/1

N2 - The dispersions containing two kinds of layered solids-graphene oxide (GO) and exfoliated montmorillonite (MMT) were mainly prepared, following which the binary aerogels were synthesized. The results indicate that the formation of liquid crystals (LCs) occurs at lower GO concentration and the birefringence becomes stronger when MMT is introduced into GO dispersion. Sol - gel transition forms in the binary suspensions with different mass fractions of MMT and GO. LCs with highly ordered alignment are observed in the gel and the fraction of LCs obviously increases with the increase in GO concentration. Moreover, the birefringence is observed in MMT - GO binary aerogels with the interconnected three-dimensional porous network, which is attributed to the ordered arrangement of MMT and GO nanosheets in pore walls. Among the aerogels with different MMT/GO ratios, the samples at the ratio of 10: 1 show better adsorption capacity and removal percentage of cationic and anionic dyes.

AB - The dispersions containing two kinds of layered solids-graphene oxide (GO) and exfoliated montmorillonite (MMT) were mainly prepared, following which the binary aerogels were synthesized. The results indicate that the formation of liquid crystals (LCs) occurs at lower GO concentration and the birefringence becomes stronger when MMT is introduced into GO dispersion. Sol - gel transition forms in the binary suspensions with different mass fractions of MMT and GO. LCs with highly ordered alignment are observed in the gel and the fraction of LCs obviously increases with the increase in GO concentration. Moreover, the birefringence is observed in MMT - GO binary aerogels with the interconnected three-dimensional porous network, which is attributed to the ordered arrangement of MMT and GO nanosheets in pore walls. Among the aerogels with different MMT/GO ratios, the samples at the ratio of 10: 1 show better adsorption capacity and removal percentage of cationic and anionic dyes.

KW - Aerogel

KW - Graphene oxide

KW - Liquid crystals

KW - Montmorillonite

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Clay-graphene oxide liquid crystals and their aerogels: Synthesis, characterization and properties

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Keywords

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