Parametric study on growth of carbon nanocoil by catalytic chemical vapor deposition
Parametric study on growth of carbon nanocoil by catalytic chemical vapor deposition
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DOI：
10.1143/jjap.44.1569
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发表时间：
2005-04-01
期刊：
影响因子：
--
通讯作者：
Ina, T
中科院分区：
文献类型：
--
作者：
Xu, GC;Chen, BB;Ina, T
在化学气相沉积（CVD）装置中，利用Fe和SnO2颗粒的混合物催化乙炔热解合成了碳纳米线圈（CNCs）。考察了反应温度、催化剂中Fe和SnO2的组成以及乙炔（C2H2）与氦气（He）的比例对反应的影响。当Fe/ SnO2比为2/1，C2H2和He气体的流量分别为150和700 sccm，反应温度为700℃时，得到的cnc纯度为80%，平均线圈直径为750 nm，纤维直径为300 nm，节距约为750 nm。CNC产率在10分钟内达到催化剂的60倍。
Carbon nanocoils (CNCs) were synthesized by the catalytic pyrolysis of acetylene over a mixture of Fe and SnO2 particles in a chemical vapor deposition (CVD) apparatus. The effects of reaction temperature, the composition of Fe and SnO2 in the catalyst, and the ratio of acetylene (C2H2) to helium (He) gas were examined. An optimum output was obtained when the Fe/ SnO2 ratio was 2/1, the flow rates of C2H2 and He gases were 150 and 700 sccm, respectively, and the reaction temperature was 700 degrees C. Under these conditions, the CNCs were of 80% purity, with average coil diameters of 750 nm, fiber diameters of 300 nm and pitches of approximately 750 nm. The CNC yield weighed up to 60 times that of the catalyst in 10 min.