• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Advanced Functional Materials >All-Carbon Nanoarchitectures as High-Performance Separation Membranes with Superior Stability
【24h】

All-Carbon Nanoarchitectures as High-Performance Separation Membranes with Superior Stability

机译：全碳纳米结构作为具有出色稳定性的高性能分离膜

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The application of graphene-based membranes is hindered by their poor stability under practical hydrodynamic conditions. Here, nanocarbon architectures are designed by intercalating surface-functionalized, small-diameter, multi-walled carbon nanotubes (MWCNTs) into reduced graphene oxide (rGO) sheets to create highly stable membranes with improved water permeability and enhanced membrane selectivity. With the intercalation of 10 nm diameter MWCNTs, the water permeability reaches 52.7 L m(-2) h(-1) bar(-1), which is 4.8 times that of pristine rGO membrane and five to ten times higher than most commercial nanofiltration membranes. The membrane also attains almost 100% rejection for three organic dyes of different charges. More importantly, the membrane can endure a turbulent hydrodynamic flow with cross-flow rates up to 2000 mL min(-1) and a Reynolds number of 4667. Physicochemical characterization reveals that the inner graphitic walls of the MWCNTs can serve as spacers, while nanoscale rGO foliates on the outer walls interconnect with the assimilated rGO sheets to instill superior membrane stability. In contrast, intercalating with single-walled nanotubes fails to reproduce such stability. Overall, this nanoarchitectured design is highly versatile in creating both graphene-rich and CNT-rich all-carbon membranes with engineered nanochannels, and is regarded as a general approach in obtaining stable membranes for realizing practical applications of graphene-based membranes.
机译：石墨烯基膜的应用由于在实际流体动力条件下稳定性差而受到阻碍。在这里，通过将表面功能化的小直径多壁碳纳米管（MWCNT）插入还原的氧化石墨烯（rGO）片材中，以创建具有改善的水渗透性和增强的膜选择性的高度稳定的膜，从而设计出纳米碳结构。通过插入直径为10 nm的MWCNT，水的渗透率达到52.7 L m（-2）h（-1）bar（-1），是原始rGO膜的4.8倍，比大多数商业纳滤高5至10倍膜。该膜还可以对三种不同电荷的有机染料实现几乎100％的排斥。更重要的是，该膜可以承受高达2000 mL min（-1）的横流速度和4667的雷诺数的湍动水动力。理化特性表明，MWCNT的内部石墨壁可以用作隔离层，而纳米级rGO的外壁上的叶与同化的rGO薄片相互连接，以灌输优异的膜稳定性。相反，插入单壁纳米管不能再现这种稳定性。总体而言，这种纳米结构设计在利用工程化的纳米通道创建富含石墨烯和富含CNT的全碳膜方面具有很高的通用性，被认为是获得稳定膜的通用方法，可实现基于石墨烯的膜的实际应用。

著录项

  • 来源
    《Advanced Functional Materials》 |2015年第47期|7348-7359|共12页
  • 作者

    Goh Kunli; Jiang Wenchao; Karahan Huseyin Enis; Zhai Shengli; Wei Li; Yu Dingshan; Fane Anthony G.; Wang Rong; Chen Yuan;

  • 作者单位

    Nanyang Technol Univ, Interdisciplinary Grad Sch, Singapore 639798, Singapore|Nanyang Technol Univ, Nanyang Environm & Water Res Inst, Singapore Membrane Technol Ctr, Singapore 637141, Singapore|Nanyang Technol Univ, Sch Chem & Biomed Engn, Singapore 637459, Singapore;

    Nanyang Technol Univ, Sch Chem & Biomed Engn, Singapore 637459, Singapore;

    Nanyang Technol Univ, Sch Chem & Biomed Engn, Singapore 637459, Singapore;

    Nanyang Technol Univ, Sch Chem & Biomed Engn, Singapore 637459, Singapore;

    Nanyang Technol Univ, Sch Chem & Biomed Engn, Singapore 637459, Singapore;

    Sun Yat Sen Univ, Sch Chem & Chem Engn, Minist Educ, Key Lab Polymer Composite & Funct Mat, Guangzhou 510275, Peoples R China;

    Nanyang Technol Univ, Nanyang Environm & Water Res Inst, Singapore Membrane Technol Ctr, Singapore 637141, Singapore;

    Nanyang Technol Univ, Nanyang Environm & Water Res Inst, Singapore Membrane Technol Ctr, Singapore 637141, Singapore;

    Nanyang Technol Univ, Sch Chem & Biomed Engn, Singapore 637459, Singapore;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    membrane stability; multi-walled carbon nanotubes; reduced graphene oxide; size exclusion;

    机译：膜稳定性;多壁碳纳米管;还原氧化石墨烯;尺寸排阻;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号