Molecular simulation study of the effect of inner wall modified groups on ionic hydration confined in carbon nanotube

Yudan Zhu, Xiaojing Guo, Qing Shao, Mingjie Wei, Ximing Wu Linghong Lu, Xiaohua Lu

Research output: Contribution to journalArticlepeer-review

37 Scopus citations

Abstract

The behaviors of the ionic hydration in nanopore are of both biological and chemical interests. Using carbon nanotube (CNT) as the 1-D nanopore model, we investigated the effect of the modified groups (CO) anchoring on the pore inner wall on the hydration of Li+, Na+ and K+ with molecular dynamics simulation. The structures of the water molecules around the cations confined in the modified CNTs were compared with their counterparts in the pristine CNTs. Among the three cations, the sequence of the sensitivity for the spatial and orientation distributions of the water molecules in the first coordination shells is: K+>Na+>Li+. The same modification results in the opposite effects for the ionic hydration inside the (10, 10) and (8, 8) CNTs. Inside the (10, 10) CNT, the modification enhances the ionic hydration, whereas inside the (8, 8) CNT, the ionic hydration is weakened by the modification of CNT wall.

Original languageEnglish
Pages (from-to)215-220
Number of pages6
JournalFluid Phase Equilibria
Volume297
Issue number2
DOIs
StatePublished - Oct 2010

Bibliographical note

Funding Information:
This study was supported by National Basic Research Program of China (No. 2009CB623400 , 2009CB219902 ), Program for Changjiang Scholars and Innovative Research Team in University ( PCSIRT 0732 ), the National Natural Science Foundation of China (Grant Nos. 20706029 , 20736002 and 20876073 ), NSFC-RGC (No. 20731160614 ).

Keywords

  • Carbon nanotube
  • Ionic hydration
  • Modified group
  • Molecular dynamics

ASJC Scopus subject areas

  • General Chemical Engineering
  • General Physics and Astronomy
  • Physical and Theoretical Chemistry

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