A practical method for the production of hollow carbon onion particles

作者：He Chunnian; Zhao Naiqin^*; Shi Chunsheng; Du Xiwen; Li Jiajun; Cui Lan

来源：Journal of Alloys and Compounds, 2006, 425(1-2): 329-333.

DOI：10.1016/j.jallcom.2006.01.031

• metals
• nanostructured materials
• fullerenes
• chemical synthesis
• X-ray diffraction

Carbon onions with diameters ranging from 5 to 50 nm and carbon-coated nickel nanoparticles with diameters ranging from 10 to 60 nm have been synthesized on a large scale over Ni/Al catalyst by chemical vapor deposition. The approximate ratio of Ni-filled to empty onions as observed by TEM is 1:3.5. In order to eliminate the nickel nanoparticle and obtain pure hollow carbon onions, HNO3 acid was used to dissolve the nickel from the carbon-coated nickel nanoparticles. The carbon onion particles thus obtained have hollow cores and are mainly composed of well-crystallized graphite, as characterized by high-resolution TEM and Raman spectroscopy. In addition, we proposed a simple purification mechanism for Ni-filled carbon onions based on TEM observations.

• 出版日期2006-11-30
• 单位天津大学