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    Effect of hydrocarbon and transport gas feedstock on efficiency and quality of grown single-walled nanotubes
    12.
    发明授权
    Effect of hydrocarbon and transport gas feedstock on efficiency and quality of grown single-walled nanotubes 有权
    碳氢化合物和运输气体原料对生长的单壁纳米管的效率和质量的影响

    公开(公告)号：US08591858B2

    公开(公告)日：2013-11-26

    申请号：US12113814

    申请日：2008-05-01

    申请人： Avetik R. Harutyunyan ,  Elena Mora

    发明人： Avetik R. Harutyunyan ,  Elena Mora

    IPC分类号： C01B31/02 ,  D01C5/00 ,  D01F9/12 ,  B01J19/08 ,  C09C1/56 ,  B32B9/00 ,  B32B17/08

    CPC分类号： D01F9/127 ,  B82Y30/00 ,  D01F9/1272 ,  D01F9/133

    摘要： Methods and processes for synthesizing high quality carbon single-walled nanotubes (SWNTs) are provided. The method provides the means for optimization of amount of carbon precursor and transport gas per unit weight of catalyst. In certain aspects, methods are provided wherein a supported metal catalyst is contacted with a carbon precursor gas at about one atmosphere pressure, wherein SWNTs are synthesized at a growth rate of about 0.002 μm/sec to about 0.003 μm/sec and the SWNTs have a ratio of G-band to D-band in Raman spectra (IG:ID) of greater than about 4. Efficiencies of about 20% can be achieved when contacting the catalyst deposited on a support with a carbon precursor gas with a flow rates of about 4.2×10−3 mol CH4/sec·g (Fe) at 780° C. Hydrocarbon flow rates of about 1.7 10−2 mol CH4/sec·g (Fe) and higher result in faster carbon SWNTs growth with improved quality. Slower rates of carbon atoms supply (˜4.5×1020 C atoms/s·g Fe or 6.4×10−4 mol CH4/sec·g (Fe)) result in the formation of more defective nanotubes.

    摘要翻译： 提供了合成高质量碳单壁纳米管（SWNT）的方法和工艺。 该方法提供了用于优化碳前体和每单位重量催化剂的运输气体的量的方法。 在某些方面，提供了一种方法，其中负载金属催化剂在大约一个大气压下与碳前体气体接触，其中以约0.002mum / sec至约0.003mum / sec的生长速率合成SWNT，并且SWNT具有 将拉伸光谱中的G带与D带的比例（IG：ID）大于约4.当将沉积在载体上的催化剂与碳前体气体接触，流速约为约20％时，可实现约20％的效率 4.2×10-3 mol CH4 / sec·g（Fe）在780°C。烃流量约为1.7×10-2 mol CH4 / sec·g（Fe）和更高，导致更快的碳SWNTs生长，质量提高。 碳原子供应速度较慢（〜4.5×1020 C原子/ s·g Fe或6.4×10-4 mol CH4 / sec·g（Fe））导致形成更多缺陷的纳米管。