Fe-encapsulating carbon nano onionlike fullerenes from heavy oil residue


Fe-encapsulating carbon nano onionlike fullerenes (NOLFs) were obtained by chemical vapor deposition (CVD) using heavy oil residue as carbon source and ferrocene as catalyst precursor in an argon flow of 150 mL/min at 900 °C for 30 min. Field-emission scanning electron microscopy (FE-SEM), high-resolution transmission electron microscopy (HRTEM), energy-dispersive spectroscopy (EDS), x-ray diffraction (XRD), and Raman spectroscopy were used to characterize morphology and microstructure of the products. The results show that Fe-encapsulating NOLFs collected at the outlet zone of quartz tube had core/shell structures with sizes ranging from 3 to 6 nm and outer shells composed of poorly crystallized graphitic layers. Their growth followed particle self-assembling growth mechanism, and all atoms in the graphite sheets primarily arose from Fe-carbide nanoparticles.

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We gratefully acknowledge the financial support from the National Basic Research Program of China (2004CB217808), the National Natural Scientific Foundation of China (90306014, 20676086), and the Natural Science Foundation of Shanxi Province (20051018).

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Correspondence to Bingshe Xu.

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Yang, Y., Liu, X. & Xu, B. Fe-encapsulating carbon nano onionlike fullerenes from heavy oil residue. Journal of Materials Research 23, 1393–1397 (2008). https://doi.org/10.1557/JMR.2008.0174

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