硼异质富勒烯制备过程中巴基管与巴基葱的异常生长行为

ABNORMAL GROWTH OF BUCKYTUBULES AND BUCKYONIONS DURING SYNTHESIS OF BORON HETEROFULLERENES

电弧法制备掺硼富勒烯过程中发现，与纯富勒烯相比，掺硼富勒烯烟灰的电导率提高一个数量级以上。电镜观察显示掺硼富勒烯烟灰中含有较多的巴基管和巴基葱，而阴极沉积物中则发现含有珠链状巴基葱。

Some accompanying effects while preparing boron heterofullerenes by arcing the boron impregnated graphite rod using the DC arc discharge heating apparatus were presented. The eletroconductivity measurements showed that the electrical conductivity of boron heterofullerene soot is one magnitude larger than that of pure fullerene soot. TEM observation revealed that much more buckytubules and buckyonions are found in the boron heterofullerenes soot, while abnormally just some pearl like buckyonions in the cathode deposits are found.The formation of buckytubules and buckyonions in the gas phase may be related to the catalysis of boron. The experimental results also indicated that buckytubules and buckyonions as well as their productivity are influenced by helium pressure, boron content in the anode and activation of boron/graphite composite rod. To our knowledge, this is the first non-metallic catalyst for synthesizing buckytubules only in the soot. It is also suggested that this may be a method for preparing pure buckyounions.