在纳米聚团床中用催化化学气相沉积法批量制备了碳纳米管,研究了过渡金属催化剂对碳纳米管形貌和产量的影响. 实验结果表明,含铁催化剂的活性较低,产率较低,但产品质量较好;含镍催化剂的活性较高,产率较高,但产品质量较差;在钴催化剂作用下发现了一种新型的针状纳米碳材料. 用含载体较少的铁催化剂可以得到纯度较高且微观结构较好的碳纳米管,但产率较低;不含任何载体的纯镍催化剂则不能得到碳纳米管. 适宜的催化剂组成、催化剂活性点的均匀分布和裂解速度的控制等构成了纳米聚团床大批量制备碳纳米管技术的关键.
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