双金属纳米颗粒在硅基底上直接催化生长碳纳米管  

Bimetallic Catalysts for the Efficient Growth of SWNTs on Silicon Surfaces

作　　者：孙丽丽[1] 马显光[1] 邓玲[1] 殷鹏飞[2] 廖新华[1] 王莉[1] 任克非[1] 宁旭[1] 陈仕国[1] 蒋洪[1] 肖忠党[3] 

机构地区：[1]第三军医大学基础部物理学教研室,重庆400038 [2]重庆交通大学理学院物理教研室,重庆400038 [3]东南大学生物电子学国家重点实验室生物医学工程学院,江苏南京210096

出　　处：《化工时刊》2008年第4期18-22,共5页Chemical Industry Times

基　　金：国家十一五科技支撑计划项目(2006BAD27B03);浙江省科技计划项目(2006C1026)资助

摘　　要：以甲烷为碳源，双金属纳米颗粒Fe／Ru（1：1）、Fe／Ru（1：1）、Ru／Fe（1：1）为催化剂，在含有加厚氧化层的硅基底上，于875-950℃制备纳米碳管，并用原子力显微镜（atomic force micmscopr——AFM）和拉曼光谱进行表征，发现随着反应温度的降低，3种催化剂的催化效果具有明显的不同程度的降低，最佳反应温度为925℃；所制备的纳米碳管都是单壁的，并且高度都约是1．25nm；对催化剂进行预处理（925℃，1min）后，其催化效果会有显著的提高，这对实现碳纳米管的定点生长具有重要的意义。The synthesis of carbon nanotubes using Fe/Ru（ 1：1 ）, Fe@ Ru（ 1：1 ）, Ru@ Fe（ 1：1 ） bimetallic nanoparticles as catalysts via the catalytic decomposition of CH4 was reported. Atomic force microscope （AFM） and Raman spectra were used to characterize the products. The experimental results indicated that the carbon nanotubes were mainly single - walled. The structure of catalyst had significant influence on the growth of carbon nanotubes on silicon substrate. With the temperature varied from 925℃ to 875℃, all of the catalytic activity of the three catalysts had dropped. The optimal temperature of reaction was 925℃. The pretreatment of catalysts could affect the yield of carbon nanotubes. The yield of cabon nanotubes obtained with catalysts calcined at 925℃ for lmin in air was higher than cat- alysts calcined at 600℃ for 30 min in air.

关 键 词：纳米碳管 原子力显微镜(AFM) 拉曼光谱 双金属纳米颗粒 

分 类 号：TB383.1[一般工业技术—材料科学与工程]