超长单晶金属有机框架纳米管
Lianli Zou1,2, Chun-Chao Hou3, Zheng Liu4
1Research Institute of Electrochemical Energy , National Institute of Advanced Industrial Science and Technology (AIST) , Ikeda, Osaka 563-8577 , Japan.
Journal of the American Chemical Society
|October 23, 2018
概括
研究人员开发了第一个单晶金属有机框架 (MOF) 纳米管. 这些纳米管可以转化为高级可充电电池和催化剂的等级碳纳米结构.
科学领域:
- 材料科学
- 纳米技术
- 化学学
背景情况:
- 金属有机框架 (MOF) 是多孔晶体材料,具有多种应用.
- 从MOF开发新的纳米结构对于先进的材料设计至关重要.
- 像纳米管这样的单维 (1D) 纳米结构为催化和分离提供了独特的特性.
研究的目的:
- 报告第一个单晶金属有机框架 (MOF) 纳米管的制造.
- 探索这些MOF纳米管的转化为等级碳纳米结构.
- 研究衍生纳米结构在催化和能量储存中的潜在应用.
主要方法:
- 使用无形MOF介导的再结晶方法合成超长单晶-有机框架 (Co-MOF) 纳米管.
- 描述MOF纳米管的形态,直径,长度和多通道结构.
- 在气氛中对Co-MOF纳米管进行碳化,使用或不使用二胺,形成碳纳米纤维和层次碳结构.
主要成果:
- 成功合成单晶Co-MOF纳米管 (~70nm直径,20-35μm长度) 具有并行多通道 (1.1nm窗口大小).
- 证明了MOF纳米管作为大分子分离的纳米柱的潜力.
- 通过碳化来制造层次的碳纳米结构 (由碳纳米管与纳米颗粒包裹的碳纳米纤维),保持1D形态.
- 在等级碳纳米结构中观察到氧降解反应的优良电催化活性.
结论:
- 已经建立了制造MOF纳米管和相关的1D纳米结构的新策略.
- 合成的MOF纳米管作为先进碳纳米材料的多功能前体.
- 由此产生的等级碳纳米结构显示出可充电Zn-空气电池和电催化剂中的应用具有显著的前景.
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