Journal
PHYSICAL REVIEW LETTERS
Volume 121, Issue 22, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.121.226102
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Funding
- National Natural Science Foundation of China [11675246, 11574339]
- National Science Fund for Outstanding Young Scholars [11722548]
- Deepcomp7000 and ScGrid of Supercomputing Center
- Computer Network Information Center of Chinese Academy of Sciences
- Special Program for Applied Research on Super Computation of the NSFC-Guangdong Joint Fund (the second phase)
- Shanghai Supercomputer Center of China
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We experimentally demonstrate the formation of salt aggregations with unexpectedly high concentration inside multiwalled carbon nanotubes (CNTs) soaked only in dilute salt solution sand even in solutions containing only traces of salts. This finding suggests the blocking of fluid across CNTs by the salt aggregations when CNTs are soaked in a dilute salt solution with the concentration of seawater or even lower, which may open new avenues for the development of novel CNT-based desalination techniques. The high salt accumulation of CNTs also provides a new CNT-based strategy for the collection or extraction of noble metal salts in solutions containing traces of noble metal salts. Theoretical analyses reveal that this high salt accumulation inside CNTs can be mainly attributed to the strong hydrated cation-pi interactions of hydrated cations and pi electrons in the aromatic rings of CNTs.
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