Influence of Interactions Between Active Components and MgO on Carbon Nanotubes Growth
Fe/MgO and Mo/MgO prepared by combustion method were used as catalysts for carbon nanotubes (CNTs) growth. X-ray diffraction (XRD) was applied to study the micro-structure of the catalysts. It is found that Fe and Mo interacted with MgO by different ways. In the Fe/MgO catalyst Fe interacted with MgO to form complex (MgO)x(FeO)1-x and was then dispersed into the MgO support uniformly, resulting in very small Fe nanoparticles after reduction by hydrogen. In the Mo/MgO catalyst the Mo interacted with MgO to form stoichiometry compound MgMoO4 and relative large metal Mo particles can be generated after reduction. As a result, long and small diameter CNTs with less defects can be obtained when Fe/MgO was used as catalyst. And short and relative large diameter CNTs with high yield can be grown when Mo/MgO was used. The morphology and structure of the catalysts and as-grown CNTs were characterized by Scanning electron microscopy (SEM) and high resolution transmission electron microscopy (HRTEM) and Raman spectroscopy.
Carbon nanotubes Combustion Chemical vapor deposition Nanostructure Interaction
尚子杰 黄少铭 徐向菊 陈江英
温州大学纳米材料与化学重点实验室,温州,325027,中国
国际会议
成都
英文
2007-11-19（万方平台首次上网日期，不代表论文的发表时间）