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Synthesis of High Quality Single-Walled Carbon Nanotubes by CVD and Effect of Catalyst’s Acidity-Basicity on Nanotubes Growth
Li Yu,Zhang Xiaobin,Shen Lihua,Xu Junming,Liu Fu,Xu Guoliang,Wang Youwen
Author NameAffiliationE-mail
Li Yu Institute of Material Physics and Microstructures, State Key Laboratory of Silicon Materials, Zhejiang University, Hangzhou 310027  
Zhang Xiaobin Institute of Material Physics and Microstructures, State Key Laboratory of Silicon Materials, Zhejiang University, Hangzhou 310027 zhangxb@zju.edu.cn 
Shen Lihua Institute of Material Physics and Microstructures, Zhejiang University, Hangzhou 310027  
Xu Junming Institute of Material Physics and Microstructures, Zhejiang University, Hangzhou 310027  
Liu Fu Institute of Material Physics and Microstructures, Zhejiang University, Hangzhou 310027  
Xu Guoliang Institute of Material Physics and Microstructures, Zhejiang University, Hangzhou 310027  
Wang Youwen Analysis and Measurement Center, Zhejiang University, Hangzhou 310027  
Abstract:
High quality SWNTs are synthesized by catalytic decomposition of CH4/N2 at 1000 ℃ on the Fe-Mo/MgO catalyst prepared by a combustion method. The best combustion temperature is 550 ℃ for the catalyst. The fitting acidity-basicity can explain the high catalytic performance. The as-prepared SWNTs have been characterized by SEM, TEM, HRTEM, TGA and Raman spectroscopy. The results show that the synthesized SWNTs are usually bundles and they have a narrow diameter distribution with 0.85~1.22 nm. The best reaction atmosphere is 50/300 for the catalyst. Under this ratio of CH4/N2, the content of the prepared raw SWNTs is close to 40% weighting over the catalyst. After the raw SWNTs are treated by diluted HCl at room temperature, the sample can contain yield of SWNTs to over 75%.
Key words:  Combustion method, Acidity-basicity, Single wall carbon nanotubes, Chemical vapor decomposition method
FundProject:
高质量单壁纳米碳管的CVD法合成及催化剂酸碱性对碳管生长的影响
李昱,张孝彬,沈利华,徐军明,刘芙,许国良,王幼文
摘要:
采用燃烧法制备了Fe/Mo/MgO催化剂,用化学气相沉积法在1000 ℃下催化裂解甲烷制得了单壁纳米碳管.实验结果表明, 550 ℃下焙烧的催化剂效果最好,适宜的酸碱性应该是催化剂具有较高活性的原因.用扫描电镜、 透射电镜、 高分辨透射电镜、 热重分析和拉曼光谱等方法对制备的纳米碳管粗产品进行了表征.结果表明,该产物确为高质量单壁纳米碳管,其形态基本都以束状存在,且单壁纳米碳管直径分布较窄(0.85~1.22 nm);对反应气氛的考察表明, CH4/N2=50/300为最佳,该气氛下所制得粗产物中单壁碳
关键词:  燃烧法  酸碱性  单壁纳米碳管  化学气相沉积法
DOI:10.1088/1674-0068/18/3/411-415
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