Ion beam engineered graphene oxide membranes for mono-/di-valent metal ions separation
| Autor: | Timothy D. Murphy, Damian B. Gore, Yibin Wei, Zeljko Pastuovic, Chao Shen |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
Ion beam Graphene Metal ions in aqueous solution Oxide Ionic bonding 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Nanomaterials Ion law.invention chemistry.chemical_compound Membrane Chemical engineering chemistry law General Materials Science 0210 nano-technology |
| Zdroj: | Carbon. 158:598-606 |
| ISSN: | 0008-6223 |
| DOI: | 10.1016/j.carbon.2019.11.031 |
| Popis: | Graphene oxide (GO) membranes with precisely controlled nanopores are promising for selectively ionic separation. Here, an ion beam was used to efficiently and simply post-modify GO membranes, creating nanopores in a controllable manner. We compared the influence of GO membrane thickness and ion fluence on the GO structure and the consequent mono-/di-valent metal ion separation performance. Experimental results indicate all GO membranes exhibited improved K+ selectivity with respect to other ions after ion beam irradiation. Moreover, the K+ ion permeability of the optimal membranes is up to 1.4 × 10−3 mol m−2 h−1 and the membrane shows extremely high K+ separation factor to di-valent ions. Remarkably, this method could be used as an in-situ post-treatment for pre-assembled GO membranes. We believe that this strategy offers novel insights into fabricating nanoporous membranes constructed by two-dimensional nanomaterials for a variety of fields including energy, desalination and biomedical applications. |
| Databáze: | OpenAIRE |
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