水中电弧法制备碳纳米葱  

Carbon nano-onions prepared by arc-discharge in water

作　　者：姜鹏[1] 姚可夫[1] 

机构地区：[1]清华大学机械工程系

出　　处：《新型炭材料》2007年第4期332-336,共5页New Carbon Materials

摘　　要：采用水介质中石墨电极直流电弧放电法大量制备了高质量碳纳米葱(又称洋葱状富勒稀),借助Raman光谱仪和高分辨透射电镜(HRTEM)对制备产物进行了结构表征和几何形貌分析。实验结果表明:水介质中石墨电弧法制备的碳纳米产物主要聚集在水面附近和容器底部,放电电流大小对水面附近和容器底部产物的组成和形貌有显著影响。在放电电流约为40A时,水面附近产物是直径为5nm^20nm的球形、洋葱状碳纳米葱。其产率约4.3mg/min。研究结果表明:采用水介质中石墨电弧法能大量制备高质量的碳纳米葱。Carbon nano-onions were synthesized by arc-discharge with graphite electrodes submerged in water. The products were characterized by Raman spectroscopy and high-resolution transmission electron microscopy. It was found that the density of the arc-discharge current had a significant influence on the morphologies and the output of the products, which aggregated near the surface of the water or precipitated on the bottom. When the current used was about 40 A, the products collected near the surface of the water were well-crystallized spherical carbon nano-onions, 5-20 nm in diameter, and the output capacity was about 4.3 mg/min, indicating that a large amount of high quality nano-carbon-onions could be prepared by this technique.

关 键 词：碳纳米葱 碳纳米管 石墨电弧法 

分 类 号：TB383.1[一般工业技术—材料科学与工程]