CVD Method for Carbon Nanotubes Preparation Based on Orthogonal Experiment Using C3H6
来源期刊：Journal Of Wuhan University Of Technology Materials Science Edition2015年第5期
论文作者：苏勋文 JIANG Fang
文章页码：959 - 964
摘 要：Carbon nanotubes(CNTs) have potential applications in many fields, chemical vapor deposition(CVD) is an effective method for CNTs preparation. By CVD, the catalytic pyrolysis temperature, pyrolysis time and the size of the raw gas flow have a great influence on yield rate of CNTs and their form. In this paper, the orthogonal experiment analysis method is used for studying the influence factors of yield rate of CNTs. Research results show that, in the suitable temperature range of preparing CNTs, there is relatively more CNTs with excellent morphology, otherwise, if the temperature is too low, the growth of CNTs will not be sufficient; if the temperature is too high, then CNTs will be generated with excessive defects; with longer growth time of suitable pyrolysis of CNTs, higher yield of CNTs will be obtained; CNTs morphology with reaction time is not proportional; too low or too high raw gas flow rate is not conducive to the growth of CNTs. We have found the optimum conditions for the CNTs preparation: pyrolysis temperature 680 ℃, pyrolysis time 35 min, propylene flow rate of 180 m L/min. The results have a reference value for the preparation of CNTS and their composites.
苏勋文，JIANG Fang
School of Technology, Beijing Forestry University
摘 要：Carbon nanotubes(CNTs) have potential applications in many fields, chemical vapor deposition(CVD) is an effective method for CNTs preparation. By CVD, the catalytic pyrolysis temperature, pyrolysis time and the size of the raw gas flow have a great influence on yield rate of CNTs and their form. In this paper, the orthogonal experiment analysis method is used for studying the influence factors of yield rate of CNTs. Research results show that, in the suitable temperature range of preparing CNTs, there is relatively more CNTs with excellent morphology, otherwise, if the temperature is too low, the growth of CNTs will not be sufficient; if the temperature is too high, then CNTs will be generated with excessive defects; with longer growth time of suitable pyrolysis of CNTs, higher yield of CNTs will be obtained; CNTs morphology with reaction time is not proportional; too low or too high raw gas flow rate is not conducive to the growth of CNTs. We have found the optimum conditions for the CNTs preparation: pyrolysis temperature 680 ℃, pyrolysis time 35 min, propylene flow rate of 180 m L/min. The results have a reference value for the preparation of CNTS and their composites.
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