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以简单的浸渍法制备的NaCl担载Fe作催化剂,化学气相沉积法在400℃下裂解乙炔,并直接将产物于650℃氩气气氛中保温2h,以提高产物的石墨化程度。通过扫描电子显微镜对催化剂进行了表征,结果显示,大多数Fe粒子已被载体氯化钠分散为粒径在10~40nm之间的纳米颗粒;通过高分辨透射电子显微镜和X射线衍射仪对样品进行了表征,结果显示,本实验合成了粒径在20~50nm之间的石墨化程度稍高的内包Fe3C的纳米洋葱状富勒烯。
The NaCl-supported Fe prepared by simple impregnation method was used as a catalyst. The acetylene was cracked at 400 ℃ by chemical vapor deposition and the product was directly heated at 650 ℃ for 2h in argon atmosphere to improve the graphitization degree of the product. The catalyst was characterized by scanning electron microscopy. The results showed that most of the Fe particles were dispersed by the carrier sodium chloride into nanoparticles with particle size of 10 ~ 40nm. The high resolution transmission electron microscopy and X-ray diffraction The results showed that nano-onion-like fullerene with Fe 3 C with slightly higher degree of graphitization was synthesized in this experiment.