Carbon nanonodules fewer than ten graphenes thick grown on aligned amorphous carbon nanofibers

Carbon nanonodules fewer than ten graphenes thick grown on aligned amorphous carbon nanofibers
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在排列的无定形碳纳米纤维上生长厚度小于十个石墨烯的碳纳米结节

DOI:
10.1016/j.carbon.2011.01.019
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发表时间:
2011-05
期刊:
影响因子:
10.9
通讯作者:
Wang, Youqing
Wang, Youqing
中科院分区:
材料科学2区
文献类型:
--
作者:
Zhang, Zhenxing;Xie, Erqing;Xie, Yizhu;Lu, Bingan;Duan, Huigao;Liu, Yanxia;Zhu, Chenquan;Li, Xiaodong;Bao, Zhong;Wang, Youqing

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利用碳化诱导自组装技术在非晶碳纳米纤维上生长了一种含有少于10层石墨烯的碳纳米球。研究发现,碳纳米球的制备需要在220°C空气中预氧化和在750°C高真空(1×10 - 4Pa)中碳化的连续过程。提出了无定形纳米纤维向碳纳米结演化的可能机制。研究还发现,纤维静电纺丝过程中收集器的温度和碳化压力是纳米结生长的关键因素。利用这些机制,碳纳米球可以选择性地生长在所制备的无定形碳纳米纤维上,使用预氧化和碳化的静电纺丝的甘油-聚丙烯腈纤维。
A novel structure of carbon nanonodules containing fewer than 10 layers graphene has grown on amorphous carbon nanofibers by carbonization-induced self-assembly. It is found that a successive processes containing pre-oxidation in air at 220°C and carbonization in a high vacuum (1×10−4Pa) at 750°C are necessary for the fabrication of the carbon nanonodules. Possible mechanism for the evolution of amorphous nanofibers to carbon nanonodules is presented. It is also found that the temperature of the collector during electrospinning of the fiber and the pressure of carbonization are critical factors for growth of the nanonodules. With these mechanisms, carbon nanonodules can be selectively grown on the prepared amorphous carbon nanofibers using pre-oxidation and carbonization of an electrospun glycerol–polyacrylonitrile fiber.
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