Catalytic growth of carbon nanoballs with and without cobalt encapsulation

Ziyi Zhong*, Huayi Chen, Songbei Tang, Jun Ding, Jianyi Lin, Kuang Lee Tan

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

80 Scopus citations


Carbon nanoballs encapsulated with cobalt were prepared by decomposition of methane. After acid treatment, the encapsulated cobalt can be removed to produce hollow carbon nanoballs. The content of hollow carbon nanoballs as high as 90 vol% in acid-treated carbon product can be obtained by increasing the content of cobalt from 50 to 75 mol% in the catalysts. However, under the same catalytic conditions, the main carbon products are multi walled carbon tubes (MWNTs) over Co/Al2O3, Co/La2O3, Co/CeO2 and Ni/MgO catalysts by decomposition of CH4, or by decomposition of CO over Co/MgO catalysts. These carbon nanoballs encapsulated with cobalt are novel magnetic materials.

Original languageEnglish
Pages (from-to)41-47
Number of pages7
JournalChemical Physics Letters
Issue number1-2
StatePublished - 3 Nov 2000
Externally publishedYes


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