Interlayer Void Space as the Key Semipermeable Site for Sieving Molecules and Leaking Ions in Graphene Oxide Filter

Mohammad Razaul Karim, Md Saidul Islam, Nurun Nahar Rabin, Hiroshi Takehira, Kosuke Wakata, Masaaki Nakamura, Ryo Ohtani, Kei Toda, Shinya Hayami

研究成果: Contribution to journalArticle

6 被引用数 (Scopus)

抄録

Within the nanopores, junctions and interlayer void space (IVS) in graphene oxide film (GOf), we report that IVS function as the key semipermeable site during sieving. The GOf could filter only dye molecules having nanometer-ranged dimensions. Tinier hydrated ions with angstrom-ranged dimensions couldn't be sieved by GOf. Nature and extent of this molecular sieving property have been justified by observing sieving efficacy and flow times for aqueous solutions of dyes, inorganic salts and their mixtures. GOf also could separate the dyes from mixtures with salts. The flow time followed the trend as: mixtures > salt solutions > dye solutions. PXRD data reveal entering of dye molecules at IVS during sieving. Obviously, a part of dye molecules leaking through the nanopores and junctions of GOf, finally become trapped at the IVS. IVS, therefore has been recognized as the key semipermeable site for molecular sieving in GO. With exploring the insight features of molecular sieving in GOf, this report clearly indicates that IVS needs to be tuned to adopt GOf for various analytical aspects including water purification, desalination and organic inorganic separation.

本文言語英語
ページ(範囲)4248-4254
ページ数7
ジャーナルChemistrySelect
2
15
DOI
出版ステータス出版済み - 1 1 2017
外部発表はい

All Science Journal Classification (ASJC) codes

  • Chemistry(all)

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