摘要
采用化学气相沉积法（chemical vapor deposition）制备碳纳米管．在高温裂解甲烷制备碳纳米管的反应体系中，比较研究了碳酸钠、碳酸钾、碳酸钙和碳酸钡等碳酸盐作为毒物对镍基催化剂和碳纳米管的影响；另外，还考察了裂解温度对碳纳米管的产率和管型的影响。实验中采用气相色谱（gas chromatography）在线检测甲烷的转化率，从而比较镍基催化荆的催化活性；采用透射电子显微镜（transmission electron microscopy）对合成的碳纳米管的外部形貌进行观察。结果发现，无论是从碳纳米管的产率还是形貌，碳酸钠均优于其它几种碳酸盐，内管径可达到70-80nm，另外还发现，750℃为此法制备碳纳米管的最佳裂解温度。
Carbon nanotubes（CNTs） were prepared from decomposition of methane by chemical vapor deposition（CVD） method. Several kinds of carbonates were added to the Ni-base catalyst,such as sodium carbonate, potassium carbonate, calcium carbonate and barium carbonate,etc.In addition,the decomposition temperature was also discussed. During the process of preparation, catalysts and carbon nanobtues were characterized by gas chromatography（GC） and transmission electron microscopy （TEM） technique.The experimental results showed that sodium carbonate was superior to the other carbate as poisonous substances according to the methane conversion and microstructure of carbon nanotubes. Morever, the optimal decomnosition temnerature was 750℃ in the catalytic reaction system.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2007年第A06期2296-2299,共4页
Journal of Functional Materials
基金
基金项目：国家自然科学基金资助项目（20263003）
江西省自然科学基金资助项目（0250009）
关键词
碳纳米管
化学气相沉积法
碳酸盐
裂解温度
carbon nanotubes
chemical vapor deposition
carbonate
decomposition temperature
