Effective and sustainable Cs+ remediation via exchangeable sodium-ion sites in graphene oxide fibers

Heehyeon Lee, Kyungeun Lee, Sang Ouk Kim, Jae-Seung Lee, Youngtak Oh

Research output: Contribution to journalReview article

Abstract

A monovalent sodium-functionalized graphene oxide fiber (Na-GO) structure was synthesized via facile and simple liquid coagulation of a graphene oxide solution. Supported by the stable GO framework, the readily accessible sodium site of this alkali-metal-carbon heterostructure allows effective removal of Cs+ in aqueous medium with a rapid equilibrium time (∼30 min) and a large adsorption capacity (220 mg g-1). Na-GO possesses physical and chemical integrity in a broad pH range (4-10), and the adsorption behavior is influenced by the hydration radius of the targeting cation, charge effect, π-M+ interaction, and pH-dependent GO hydrophilicity. In utilizing the chemical potential effect of Na-GO, a simple regeneration process with NaOH solution selectively releases captured Cs+ and replenishes functional sodium sites within the Na-GO structure, providing a rechargeable Cs+ remediation functionality. This study demonstrates the successful adaptation of the alkali-metal-induced reversible ion-exchange principle for a versatile GO fiber structure.

Original languageEnglish
Pages (from-to)17754-17760
Number of pages7
JournalJournal of Materials Chemistry A
Volume7
Issue number30
DOIs
Publication statusPublished - 2019 Jan 1

Fingerprint

Graphite
Remediation
Oxides
Graphene
Alkali Metals
Sodium
Alkali metals
Ions
Fibers
Adsorption
Chemical potential
Hydrophilicity
Coagulation
Hydration
Heterojunctions
Cations
Ion exchange
Carbon
Positive ions
Liquids

ASJC Scopus subject areas

  • Chemistry(all)
  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

Cite this

Effective and sustainable Cs+ remediation via exchangeable sodium-ion sites in graphene oxide fibers. / Lee, Heehyeon; Lee, Kyungeun; Kim, Sang Ouk; Lee, Jae-Seung; Oh, Youngtak.

In: Journal of Materials Chemistry A, Vol. 7, No. 30, 01.01.2019, p. 17754-17760.

Research output: Contribution to journalReview article

Lee, Heehyeon ; Lee, Kyungeun ; Kim, Sang Ouk ; Lee, Jae-Seung ; Oh, Youngtak. / Effective and sustainable Cs+ remediation via exchangeable sodium-ion sites in graphene oxide fibers. In: Journal of Materials Chemistry A. 2019 ; Vol. 7, No. 30. pp. 17754-17760.
@article{f4be7bef4e324eb790640ed0dc560fe9,
title = "Effective and sustainable Cs+ remediation via exchangeable sodium-ion sites in graphene oxide fibers",
abstract = "A monovalent sodium-functionalized graphene oxide fiber (Na-GO) structure was synthesized via facile and simple liquid coagulation of a graphene oxide solution. Supported by the stable GO framework, the readily accessible sodium site of this alkali-metal-carbon heterostructure allows effective removal of Cs+ in aqueous medium with a rapid equilibrium time (∼30 min) and a large adsorption capacity (220 mg g-1). Na-GO possesses physical and chemical integrity in a broad pH range (4-10), and the adsorption behavior is influenced by the hydration radius of the targeting cation, charge effect, π-M+ interaction, and pH-dependent GO hydrophilicity. In utilizing the chemical potential effect of Na-GO, a simple regeneration process with NaOH solution selectively releases captured Cs+ and replenishes functional sodium sites within the Na-GO structure, providing a rechargeable Cs+ remediation functionality. This study demonstrates the successful adaptation of the alkali-metal-induced reversible ion-exchange principle for a versatile GO fiber structure.",
author = "Heehyeon Lee and Kyungeun Lee and Kim, {Sang Ouk} and Jae-Seung Lee and Youngtak Oh",
year = "2019",
month = "1",
day = "1",
doi = "10.1039/c9ta04027g",
language = "English",
volume = "7",
pages = "17754--17760",
journal = "Journal of Materials Chemistry A",
issn = "2050-7488",
publisher = "Royal Society of Chemistry",
number = "30",

}

TY - JOUR

T1 - Effective and sustainable Cs+ remediation via exchangeable sodium-ion sites in graphene oxide fibers

AU - Lee, Heehyeon

AU - Lee, Kyungeun

AU - Kim, Sang Ouk

AU - Lee, Jae-Seung

AU - Oh, Youngtak

PY - 2019/1/1

Y1 - 2019/1/1

N2 - A monovalent sodium-functionalized graphene oxide fiber (Na-GO) structure was synthesized via facile and simple liquid coagulation of a graphene oxide solution. Supported by the stable GO framework, the readily accessible sodium site of this alkali-metal-carbon heterostructure allows effective removal of Cs+ in aqueous medium with a rapid equilibrium time (∼30 min) and a large adsorption capacity (220 mg g-1). Na-GO possesses physical and chemical integrity in a broad pH range (4-10), and the adsorption behavior is influenced by the hydration radius of the targeting cation, charge effect, π-M+ interaction, and pH-dependent GO hydrophilicity. In utilizing the chemical potential effect of Na-GO, a simple regeneration process with NaOH solution selectively releases captured Cs+ and replenishes functional sodium sites within the Na-GO structure, providing a rechargeable Cs+ remediation functionality. This study demonstrates the successful adaptation of the alkali-metal-induced reversible ion-exchange principle for a versatile GO fiber structure.

AB - A monovalent sodium-functionalized graphene oxide fiber (Na-GO) structure was synthesized via facile and simple liquid coagulation of a graphene oxide solution. Supported by the stable GO framework, the readily accessible sodium site of this alkali-metal-carbon heterostructure allows effective removal of Cs+ in aqueous medium with a rapid equilibrium time (∼30 min) and a large adsorption capacity (220 mg g-1). Na-GO possesses physical and chemical integrity in a broad pH range (4-10), and the adsorption behavior is influenced by the hydration radius of the targeting cation, charge effect, π-M+ interaction, and pH-dependent GO hydrophilicity. In utilizing the chemical potential effect of Na-GO, a simple regeneration process with NaOH solution selectively releases captured Cs+ and replenishes functional sodium sites within the Na-GO structure, providing a rechargeable Cs+ remediation functionality. This study demonstrates the successful adaptation of the alkali-metal-induced reversible ion-exchange principle for a versatile GO fiber structure.

UR - http://www.scopus.com/inward/record.url?scp=85070093564&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85070093564&partnerID=8YFLogxK

U2 - 10.1039/c9ta04027g

DO - 10.1039/c9ta04027g

M3 - Review article

AN - SCOPUS:85070093564

VL - 7

SP - 17754

EP - 17760

JO - Journal of Materials Chemistry A

JF - Journal of Materials Chemistry A

SN - 2050-7488

IS - 30

ER -