【摘要】 以Er/N i为催化剂采用直流电弧放电法合成单壁碳纳米管(SWNTs),并用扫描电子显微镜、透射电子显微镜、拉曼光谱及X射线衍射对电弧放电后的产物进行表征.结果表明,以Er/N i为催化剂与Y/N i和Ho/N i为催化剂合成碳纳米管的直径分布相近,其直径分布为1.35~1.65 nm,以1.5 nm为直径的碳纳米管占多数.对阴极沉积物的X射线衍射分析可知,稀土元素Er在电弧放电过程中形成稀土碳化物是合成SWNTs产率高的重要因素.更多还原

【Abstract】 Single wall carbon nanotubes(SWNTs) were synthesized in high yield by means of DC arc discharge with Er/Ni as catalyst.The yielded products,including web-like SWNTs samples and cathode deposit,were characterized with SEM,TEM,Raman spectroscopy and X-ray diffraction.The results indicate that the diameter distribution of the synthesized SWNTs with Er/Ni as catalyst is in a range of 1.35 to 1.65 nm and the nanotube with a diameter of 1.5 nm is dominant in the samples,which is similar to that of the diameter distribution of SWNTs synthesized with Y/Ni and Ho/Ni as catalysts.The X-ray diffraction analysis of the cathode deposit indicates that the Er-carbide has formed in the cathode deposit and it is a very important factor for the high-yield synthesis of SWNTs.更多还原