Effect of chemistry and geometry of GO nanochannels on the Li ion selectivity and recovery
- Publisher:
- ELSEVIER
- Publication Type:
- Journal Article
- Citation:
- Desalination, 2020, 496
- Issue Date:
- 2020-12-15
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| Filename | Description | Size | |||
|---|---|---|---|---|---|
| 1-s2.0-S0011916420314077-main.pdf | Published version | 13.47 MB |
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© 2020 Elsevier B.V. The continually increasing demand for lithium (Li) is predicted to soon exceed its availability, rendering it a geopolitically significant resource. Although seawater is considered one of the largest Li resources, the coexistence of Li ion (Li+) with chemically similar ions such as Na+ and K+ in seawater and its low concentration makes the Li+ extraction from this resource very challenging. Here, the chemical and morphological characterization of graphene traps for maximum lithium-ion capture was introduced by using a theoretical approach. The results illustrate the effect of the key parameters including interlayer spacing and length, surface charge, and functional group, and nanochannel morphology on Li+ selectivity, which results in the cavities with innovative intrinsic traps. These cavities benefit from cation-π interactions, the ability to control interlayer spacing based on the functional group, and a variable energy barrier. The improvements in Li+ selectivity in functionalized asymmetrical graphene nanochannels has been demonstrated, providing new insights for Li+ selective material design.
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