Y/Ni是电弧放电法制备单壁碳纳米管(SWNTs)时常用的催化剂.本文研究了FeS在Y/Ni催化剂中的添加对SWNTs制备的影响.结果发现FeS的添加不仅能增加网状产物的百分比,还能使网状产物中SWNTs的含量明显增多.这表明Y/Ni中FeS的添加能使更多的石墨转化为SWNTs.导致这一结果的原因可能有两个:(1)硫可能会扩大反应腔体中适合SWNTs生长的空间;(2)硫作为交联剂能促进碳元素的石墨化.
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