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40 A时,水面附近产物是直径为5 nm～20 nm的球形、洋葱状碳纳米葱.其产率约4.3 mg/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.
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