Ambivalent Effect of Thermal Reduction in Mass Rejection through Graphene Oxide Membrane

Jin Hyeok Jang, Ju Yeon Woo, Jaeyeol Lee, Chang-Soo Han

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

We report ambivalent rejection behavior of a graphene oxide membrane (GOM) having a reduced interlayer spacing. Ultrathin GOMs having a thickness of 50 nm were fabricated using a vacuum filtration method followed by subjecting the samples to thermal reduction at 162 °C. The interlayer spacing of GOMs was reduced by 1 Å on thermal reduction as compared with that of the natural GOMs. The rejection rate with dye molecules was tested using dyes having three different types of charges in a dead-end filtration instrument. Rejection rate of the reduced GOM with the dyes having an opposite charge was improved up to 99.7%, indicating the dominant effect of the physical sieving diameter. In contrast, in the case of ion permeation of natural GOM, a higher rejection rate for several metal ions was observed as compared with that of GOMs having 1 Å smaller interlayer spacing, indicating the dominant effect of surface charges on the GOM samples.

Original languageEnglish
Pages (from-to)10024-10030
Number of pages7
JournalEnvironmental Science and Technology
Volume50
Issue number18
DOIs
Publication statusPublished - 2016 Sep 20

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Oxides
Hot Temperature
oxide
membrane
Membranes
dye
spacing
Coloring Agents
Ions
ion
sieving
Surface charge
Vacuum
Permeation
Metal ions
Metals
Molecules
effect
metal

ASJC Scopus subject areas

  • Chemistry(all)
  • Environmental Chemistry

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Ambivalent Effect of Thermal Reduction in Mass Rejection through Graphene Oxide Membrane. / Jang, Jin Hyeok; Woo, Ju Yeon; Lee, Jaeyeol; Han, Chang-Soo.

In: Environmental Science and Technology, Vol. 50, No. 18, 20.09.2016, p. 10024-10030.

Research output: Contribution to journalArticle

Jang, Jin Hyeok ; Woo, Ju Yeon ; Lee, Jaeyeol ; Han, Chang-Soo. / Ambivalent Effect of Thermal Reduction in Mass Rejection through Graphene Oxide Membrane. In: Environmental Science and Technology. 2016 ; Vol. 50, No. 18. pp. 10024-10030.
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