论文部分内容阅读
以金镍复合膜作催化剂,在96%的高氢气浓度下实现了碳纳米管的定向生长,并对其生长过程进行了深入探讨.结果表明,高氢气浓度下碳纳米管生长的实现与本实验所选用的催化剂———金镍复合膜有密切关系.催化剂中金的参与,促进了碳在催化剂中的扩散,提高了碳在催化剂中的活度.与催化剂中没有金的情况相比较,金的参与有利于镍吸收气氛中的碳,从而使镍更容易达到碳饱和,有利于在高的氢气浓度下实现碳纳米管的定向生长.
The growth of carbon nanotubes was investigated at a high hydrogen concentration of 96% by using gold-nickel composite membrane as catalyst, and the growth process was discussed in depth.The results show that the growth of carbon nanotubes at high hydrogen concentration is related to the The experimental choice of the catalyst --- gold-nickel composite film is closely related to the catalyst of gold to promote the diffusion of carbon in the catalyst to improve the activity of carbon in the catalyst with no catalyst compared to the case , The participation of gold favors the absorption of carbon in the atmosphere by the nickel, thereby making it easier for nickel to reach carbon saturation and facilitate the directional growth of carbon nanotubes at high hydrogen concentrations.