Tunable atomic level surface functionalization of a multi-layered graphene oxide membrane to break the permeability-selectivity trade-off in salt removal of brackish water
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Kim, Tae-Nam | - |
dc.contributor.author | Lee, Jieun | - |
dc.contributor.author | Choi, Jeong-Hun | - |
dc.contributor.author | Ahn, Ji-Hoon | - |
dc.contributor.author | Yang, Euntae | - |
dc.contributor.author | Hwang, Moon-Hyun | - |
dc.contributor.author | Chae, Kyu-Jung | - |
dc.date.accessioned | 2022-02-14T20:40:31Z | - |
dc.date.available | 2022-02-14T20:40:31Z | - |
dc.date.created | 2022-02-09 | - |
dc.date.issued | 2021-11-01 | - |
dc.identifier.issn | 1383-5866 | - |
dc.identifier.uri | https://scholar.korea.ac.kr/handle/2021.sw.korea/135781 | - |
dc.description.abstract | To enhance graphene oxide (GO) membrane performance, atomic level surface functionalization was applied via plasma-enhanced atomic layer deposition (ALD) to a GO membrane. Unlike conventional ALD approaches, to functionalize the surface without increasing the membrane thickness, we conducted only a few (3-9) ALD cycles, which allowed for the formation of a tunable ultra-thin (1.44 nm) and uniform hydrophilic metal oxide (Al2O3) layer on the multi-layered membrane. The ALD-treated GO membrane exhibited enhanced water permeability (from 32.9 to 68.0 LMH/bar) and NaCl rejection (from 46.6 up to 63.8%), successfully overcoming the typical trade-off between permeability and rejection efficiency in briskish water desalination. The formed atomic level Al2O3 layer was characterized via Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), and d-spacing measurements. The results revealed that this enhanced water permeability can be mainly attributed to the increase in the surface hydrophilicity achieved without narrowing the GO membrane nanochannel structure (dry state 7.5 similar to 7.7 angstrom). Moreover, healed defects on the two-dimensional GO and improved electrostatic interaction (induced by the ALD treatment) resulted in improved salt rejection. Therefore, the distinctive features of ALD-treated GO membrane may contribute to enhancing its application in brackish water desalination. | - |
dc.language | English | - |
dc.language.iso | en | - |
dc.publisher | ELSEVIER | - |
dc.subject | LAYER DEPOSITION | - |
dc.subject | NANOFILTRATION MEMBRANES | - |
dc.subject | NANOCOMPOSITE MEMBRANES | - |
dc.subject | REVERSE-OSMOSIS | - |
dc.subject | HIGH-FLUX | - |
dc.subject | DESALINATION | - |
dc.subject | PERFORMANCE | - |
dc.subject | SEPARATION | - |
dc.subject | TRANSPORT | - |
dc.subject | AL2O3 | - |
dc.title | Tunable atomic level surface functionalization of a multi-layered graphene oxide membrane to break the permeability-selectivity trade-off in salt removal of brackish water | - |
dc.type | Article | - |
dc.contributor.affiliatedAuthor | Hwang, Moon-Hyun | - |
dc.identifier.doi | 10.1016/j.seppur.2021.119047 | - |
dc.identifier.scopusid | 2-s2.0-85108082978 | - |
dc.identifier.wosid | 000668929400007 | - |
dc.identifier.bibliographicCitation | SEPARATION AND PURIFICATION TECHNOLOGY, v.274 | - |
dc.relation.isPartOf | SEPARATION AND PURIFICATION TECHNOLOGY | - |
dc.citation.title | SEPARATION AND PURIFICATION TECHNOLOGY | - |
dc.citation.volume | 274 | - |
dc.type.rims | ART | - |
dc.type.docType | Article | - |
dc.description.journalClass | 1 | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Engineering | - |
dc.relation.journalWebOfScienceCategory | Engineering, Chemical | - |
dc.subject.keywordPlus | AL2O3 | - |
dc.subject.keywordPlus | DESALINATION | - |
dc.subject.keywordPlus | HIGH-FLUX | - |
dc.subject.keywordPlus | LAYER DEPOSITION | - |
dc.subject.keywordPlus | NANOCOMPOSITE MEMBRANES | - |
dc.subject.keywordPlus | NANOFILTRATION MEMBRANES | - |
dc.subject.keywordPlus | PERFORMANCE | - |
dc.subject.keywordPlus | REVERSE-OSMOSIS | - |
dc.subject.keywordPlus | SEPARATION | - |
dc.subject.keywordPlus | TRANSPORT | - |
dc.subject.keywordAuthor | Aluminum oxide | - |
dc.subject.keywordAuthor | Atomic layer deposition | - |
dc.subject.keywordAuthor | Graphene oxide | - |
dc.subject.keywordAuthor | Membrane technology | - |
dc.subject.keywordAuthor | Salt rejection | - |
dc.subject.keywordAuthor | Water desalination | - |
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.
(02841) 서울특별시 성북구 안암로 14502-3290-1114
COPYRIGHT © 2021 Korea University. All Rights Reserved.
Certain data included herein are derived from the © Web of Science of Clarivate Analytics. All rights reserved.
You may not copy or re-distribute this material in whole or in part without the prior written consent of Clarivate Analytics.