Graphene Oxide Nanoribbon Hydrogel: Viscoelastic Behavior and Use as a Molecular Separation Membrane
- Authors
- Choi Y.; Kim S.-S.; Kim J.H.; Kang J.; Choi E.; Choi S.E.; Kim J.P.; Kwon O.; DAEWOO KIM
- Issue Date
- Sep-2020
- Publisher
- AMER CHEMICAL SOC
- Keywords
- coating; graphene nanoribbon; hydrogel; membrane; nanofiltration; scaffold
- Citation
- ACS NANO, v.14, no.9, pp 12,195 - 12,202
- Journal Title
- ACS NANO
- Volume
- 14
- Number
- 9
- Start Page
- 12,195
- End Page
- 12,202
- URI
- https://yscholarhub.yonsei.ac.kr/handle/2021.sw.yonsei/6410
- DOI
- 10.1021/acsnano.0c05902
- ISSN
- 1936-0851
- Abstract
- The preparation of carbon materials based hydrogels and their viscoelastic properties are essential for their broad application and scale-up. However, existing studies are mainly focused on graphene derivatives and carbon nanotubes, and the behavior of graphene nanoribbon (GNR), a narrow strip of graphene, remains elusive. Herein, we demonstrate the concentration-driven gelation of oxidized GNR (graphene oxide nanoribbon, GONR) in aqueous solvents. Exfoliated individual GONRs sequentially assemble into strings (∼1 mg/mL), nanoplates (∼20 mg/mL), and a macroporous scaffold (50 mg/mL) with increasing concentration. The GONR hydrogels exhibit viscoelastic shear-thinning behavior and can be shear-coated to form large-area GONR films on substrates. The entangled and stacked structure of the GONR film contributed to outstanding nanofiltration performance under high pressure, cross-flow, and long-term filtration, while the precise molecular separation with 100% rejection rate was maintained for sub-nanometer molecules.
- Files in This Item
- There are no files associated with this item.
- Appears in
Collections - College of Engineering > Chemical Engineering > 1. Journal Articles
Items in Scholar Hub are protected by copyright, with all rights reserved, unless otherwise indicated.