磁黄铁矿在纳米碳管生长中的作用

PYRRHOTITE CATALYZED GROWTH OF CARBON NANOTUBES

本文采用天然磁黄铁矿矿物六方磁黄铁矿和单斜磁黄铁矿分别作催化剂，引入电弧法生长纳米碳管，发现二者具有截然不同的催化效果。在此基础上，探讨了在合成纳米碳管实验中磁黄铁矿的催化作用及催化机理。

Arc method is used to study the growth of carbon nanotubes.Both clinopyrrhotite and hexagonalpyrrhotite are selected as catalysts in the experiments.Great difference of catalytic results exists between the two kinds of pyrrhotite catalysts. When hexagonalpyrrhotite was used as catalyst, the production of nanotubes decreased.When clinopyrrhotite was used as catalyst,not only the production of nanotubes increased, but also the shape and length of nanotubes changed.The analysis on the structure of the two kinds of pyrrhotite leads to the recognition that there are more vacancy and structural defects within and on the surface of clinopyrrhotite than those of hexagonalpyrrhotite.As a result,the clinopyrrhotite is more active and the catalyst of pyrrhotite is more efficient.