• 文献标题:   Clay-graphene oxide liquid crystals and their aerogels: synthesis, characterization and properties
  • 文献类型:   Article
  • 作  者:   YE SS, YANG ZH, XU JM, SHANG ZH, XIE J
  • 作者关键词:   graphene oxide, montmorillonite, liquid crystal, aerogel
  • 出版物名称:   ROYAL SOCIETY OPEN SCIENCE
  • ISSN:   2054-5703
  • 通讯作者地址:   China Univ Geosci
  • 被引频次:   1
  • DOI:   10.1098/rsos.181439
  • 出版年:   2019

▎ 摘  要

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.