环己烷浮游催化法制备超长碳纳米管阵列

新型炭材料, 2010, 25(3): 168-174.

环己烷浮游催化法制备超长碳纳米管阵列

杨州 ^1, , 张强 ^2, , 罗国华 ^3, , 项荣 ^4, , 骞伟中 ^5, , 王垚 ^6, , 魏飞 ^7,

1.清华大学化工系,绿色反应工程与工艺北京市重点实验室,北京,100084

2.清华大学化工系,绿色反应工程与工艺北京市重点实验室,北京,100084

3.清华大学化工系,绿色反应工程与工艺北京市重点实验室,北京,100084

4.清华大学化工系,绿色反应工程与工艺北京市重点实验室,北京,100084

5.清华大学化工系,绿色反应工程与工艺北京市重点实验室,北京,100084

6.清华大学化工系,绿色反应工程与工艺北京市重点实验室,北京,100084

7.清华大学化工系,绿色反应工程与工艺北京市重点实验室,北京,100084

基金项目: 国家重大基础研究"纳米科技"计划(2006CB932702) 自然科学基金(20736004;20736007)

关键词：碳纳米管阵列 , 环己烷 , 浮游催化 , 二茂铁

Growth of super long vertically aligned carbon nanotube arrays from cyclohexane via floating catalyst method

采用非芳香烃类环己烷作为碳源,通过浮游法实现了超长垂直碳纳米管(Carbon nanotube, CNT) 阵列的生长.研究表明:浮游催化过程中反应温度、催化剂前体补给速度、进料速度、生长气氛等因素对CNT阵列的生长影响显著.在直径为25 mm的石英反应器中,反应温度、催化剂前体二茂铁的补给速度、碳源环己烷的补给速度、反应气氛分别控制在820℃、0.24mg/min、0.12mL/min、640mL/min(H2/Ar=1∶15)的生长窗口内,实现了CNT阵列的快速协同生长.在单因素考察的基础上,通过对宏观参数的调变,可以制备出长度达5.0mm的CNT阵列.所获得的CNT取向一致,长径比大于105,纯度达到96.7%.

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