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以硝酸镍和正硅酸乙酯为主要原料,采用前驱物水热法制得不同镍含量的纳米Ni(OH)2/SiO2复合粉体,用复合粉体做催化剂催化裂解C2H2制得多壁碳纳米管粗产物.研究表明:在复合粉体Ni(OH)2/SiO2催化剂中,硅镍比在一定范围内(1:2~1:14),随着镍含量增加,粒径增大,结晶程度提高,催化剂活性先提高后下降,制得的碳纳米管纯度及产量先增后降,碳管的管径分布范围先窄后宽.催化剂硅镍比为1:12时,制得的碳纳米管纯度高,管径细而均匀(10~18nm),且粗产物数量较多(1g催化剂合成3.3g碳纳米管粗产物).

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