Formation of silicate nanoscrolls through solvothermal treatment of layered octosilicate intercalated with organoammonium ions

Yusuke Asakura, Megumi Sugihara, Takeru Hirohashi, Aya Torimoto, Takuya Matsumoto, Masakazu Koike, Yoshiyuki Kuroda, Hiroaki Wada, Atsushi Shimojima, Kazuyuki Kuroda

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

We report silicate nanoscrolls composed of only SiO4 tetrahedra with crystalline walls for the first time in this study. The procedure consists of the intercalation of layered octosilicate with dioctadecyldimethylammonium bromide ((C18)2DMABr) and the subsequent solvothermal treatment of the intercalated material in heptane. The walls of the obtained nanoscrolls are crystalline, which originates from layer crystallinity in the pristine silicate. The direction of rolling up is fixed at the a- or b-axis of the silicate based on the electron diffraction patterns of the nanoscrolls. Desorption of (C18)2DMABr, which is present in addition to (C18)2DMA cations, from the interlayer during solvothermal treatment is likely related to the nanoscrolling process. Although the yield of nanoscrolls is low, these findings will lead to the re-estimation of many layered silicates intercalated with long-chain alkylammonium compounds as precursors for silicate nanoscrolls with crystalline walls.

Original languageEnglish
Pages (from-to)12924-12931
Number of pages8
JournalNanoscale
Volume11
Issue number27
DOIs
Publication statusPublished - 2019 Jul 21

ASJC Scopus subject areas

  • Materials Science(all)

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