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Italicized carbon nanotube facilitating water transport: a molecular dynamics simulation
  • ISSN号:0253-9837
  • 期刊名称:《催化学报》
  • 时间:0
  • 分类:O552.421[理学—热学与物质分子运动论;理学—物理] TG111.4[金属学及工艺—物理冶金;金属学及工艺—金属学]
  • 作者机构:[1]State Key Laboratory for Chemical Engineering, Department ofChemical Engineering, Tsinghua University, Beijing 100084,China
  • 相关基金:Acknowledgments This work was supported by the National Nat- ural Science Foundation of China (21476125), Tsinghua University Foundation (2013108930) and State Key Laboratory of Chemical Engineering (SKL-CHE-10A01).
中文摘要:

当在碳 nanotube 内的水的优先的运动正在恳求水纯化时,我们通过碳理解 nanotube (CNT ) 基于膜水运输机制是远非足够的。这里,我们进行了分子的动力学模拟学习在膜的 CNT 的排列怎么通过 CNT 膜影响水运输。这被显示出与 CNT 的排列对膜表面垂直的常规 CNT 膜相比,在膜表面和 CNT 排列之间的接触天使不是 90 的用斜体印刷的 CNT 在膜 ? 桴 ? 潢吗?

英文摘要:

While the preferential movement of water inside carbon nanotube is appealing for water purification, our understanding of the water transport mechanism through carbon nanotube (CNT)-based membrane is far from adequate. Here we conducted molecular dynamics simulations to study how the alignment of the CNTs in the membrane affects the water transport through the CNT membrane. It was shown that compared to the conventional CNT membrane where the alignment of CNTs was vertical to membrane surface, the "italicized CNT membrane" in which the contact angel between membrane surface and the CNT alignment is not 90° offered a higher transmembrane flux of water. The expanded exposure of more carbon atoms to water molecules reduced the energy barrier near the entrance of this italicized CNT membrane, compared to the vertical one. For water flows through the italicized CNT membrane, the Lennard-Jones interaction between water and nanotube as function of central path of the CNT changes from "U" to "V" pattern, which significantly lowers energy barrier for filling water into the CNT, favoring the water transport inside carbon nanotube. Above simulation indicates new opportunities for applying CNT in water purification or related fields in which water transport matters.

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期刊信息
  • 《催化学报》
  • 北大核心期刊(2011版)
  • 主管单位:中国科学院
  • 主办单位:中国化学会 中国科学院大连化学物理研究所
  • 主编:李灿 张涛
  • 地址:大连市沙河口区中山路457号
  • 邮编:116023
  • 邮箱:chxb@dicp.ac.cn
  • 电话:0411-84379240
  • 国际标准刊号:ISSN:0253-9837
  • 国内统一刊号:ISSN:21-1195/O6
  • 邮发代号:8-93
  • 获奖情况:
  • 第三届国家期刊奖提名奖,中国科协精品科技期刊示范项目
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  • 被引量:19199