膨胀石墨的孔隙内生长纳米碳管

Growth of Carbon Nanotubes in the Pores of Expanded Graphite

膨胀石墨具有丰富的网络状微孔结构和石墨微晶的活性表面,因此有较大的比表面积和较高的表面活性。膨胀石墨的孔隙结构可以负载催化剂粒子,是生长纳米碳管的物理基础。以硝酸铁为催化剂前驱体,乙炔为碳源,采用化学气相沉积工艺,可以在膨胀石墨的孔隙结构中生长稠密的纳米碳管。

Carbon nanotubes were grown in the pores of expanded graphite using chemical vapor deposition.The net-like porous structure and activated surface of expanded graphite were studied by scanning electron microscopy(SEM).The pores in the expanded graphite,which can load catalysts,are physical base for growth of carbon nanotubes.Carbon nanotubes had been synthesized with the presence of catalyst Fe(NO3)3 by using acetylene as the carbon source at 750℃.