Synthesis, characterization and microwave dielectric properties of flower-like Co(OH)2/C nanocomposites

Chao Feng, Nannan Bi, Xianguo Liu, Chuangui Jin, Kai Huang, Feng Xiao, Yuping Sun, Siu Wing Or

Research output: Journal article publicationJournal articleAcademic researchpeer-review

2 Citations (Scopus)


Flower-like Co(OH)2/C nanocomposites have been synthesized by a facile hydrothermal method. Flower-like Co(OH)2/C nanocomposites were self-assembled by the nanosheets with the thickness distribution of 50-80 nm and abundant flocculent carbon structures. With the help of transmission electron microscopy and energy dispersive spectrometer, nanosheets were observed to have core/ shell structure, in which Co(OH)2worked as cores and amorphous C as shells. When the as-prepared products were heated for 6 h at 180 °C, the Co(OH)2cores were amorphous. The heating time increased to 10 h, the Co(OH)2 cores became crystalline. The formation mechanism and the self-assembly evolution process were proposed. The microwave dielectric properties of Co(OH)2/C nanocomposites were investigated in the frequency range of 0.03-18 GHz. Compared with the amorphous Co(OH)2/C nanocomposites, crystalline nanocomposites had the better conductivity.
Original languageEnglish
Pages (from-to)920-925
Number of pages6
JournalMaterials Research
Issue number4
Publication statusPublished - 1 Jan 2014


  • Carbon
  • Core/shell structure
  • Nanocomposites
  • Nanosheets

ASJC Scopus subject areas

  • General Materials Science
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


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