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对催化分解法制备纳米碳管的催化剂作了初步的探讨和研究 ,并对纳米碳管生长的影响机理进行了分析 .实验表明 :载体的选择、催化剂的制备温度和反应气体的流量对纳米碳管生长有较大的影响 ,而制备的催化剂粒度越小 ,越有利于纳米碳管的生长 ;使用硅胶分散剂的催化剂与直接使用纳米金属颗粒催化剂相比 ,前者生成的纳米碳管纯度较高 ,后者生成的是纳米碳管与纳米碳纤维的混合体 ;一定的后处理工艺可以纯化纳米碳管产物 .因此 ,这是一种快速、简单、适合工业化生产纳米碳管的制备工艺 ,它可以使不锈钢表面直接生长出了纳米碳管 .
The catalyst for the preparation of carbon nanotubes by catalytic decomposition was preliminarily discussed and the mechanism of the effect on the growth of carbon nanotubes was analyzed.The experimental results show that the selectivity of carbon nanotubes Tube growth has a greater impact, and the smaller the catalyst particle size, the more conducive to the growth of carbon nanotubes; the use of silica gel dispersant catalyst and the direct use of nano-metal particles compared to the catalyst, the former generated higher purity of carbon nanotubes , The latter is a mixture of carbon nanotubes and carbon nanofibers; a certain post-processing technology can be purified carbon nanotubes product.Therefore, this is a fast, simple, suitable for industrial production of carbon nanotubes production process, it can So that the surface of stainless steel grow directly out of carbon nanotubes.