High-yield preparation of uniform cobalt hydroxide and oxide nanoplatelets and their characterization

Yanglong Hou, Hiroshi Kondoh, Masatsugu Shimojo, Toshihiro Kogure, Toshiaki Ohta

研究成果: Article査読

188 被引用数 (Scopus)

抄録

Cobalt hydroxide nanoplatelets with a uniform hexagonal shape were prepared in high yield (∼95%) by a facile hydrothermal route in the presence of poly(vinylpyrrolidone). This method provides a simple, low-cost, and large-scale route to produce β-cobalt hydroxide nanoplatelets with an average diameter of 280 nm and a thickness of ca. 26 nm which show a predominant well-crystalline hexagonal brucite-like phase. Their thermal decomposition produced anisotropic nanoplatelets of cobalt oxides (CoO and Co 3O4) under designed temperatures. The products were characterized by transmission electronic microscopy, selected-area electron diffraction, Fourier transform infrared spectroscopy, differential scanning calorimetric, and thermogravimetric analysis. The magnetic properties of the products were investigated by a superconducting quantum interference device magnetometer. Co3O4 nanoplatelets exhibit a superparamagnetic behavior, and they might be a promising material to study the magnetic tunneling effect as anisotropic nanostructures.

本文言語English
ページ(範囲)19094-19098
ページ数5
ジャーナルJournal of Physical Chemistry B
109
41
DOI
出版ステータスPublished - 2005 10 20
外部発表はい

ASJC Scopus subject areas

  • 物理化学および理論化学
  • 表面、皮膜および薄膜
  • 材料化学

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