Selective and controlled synthesis of α- and β-cobalt hydroxides in highly developed hexagonal platelets

Zhaoping Liu, Renzhi Ma, Minoru Osada, Kazunori Takada, Takayoshi Sasaki*

*この研究の対応する著者

研究成果: Article査読

519 被引用数 (Scopus)

抄録

We report on the controlled synthesis of single-crystal platelets of α- and β-Co(OH)2 via homogeneous precipitation using hexamethylenetetramine as a hydrolysis agent. The α- and β-Co(OH)2 hexagonal platelets of several micrometers in width and about 15 nm in thickness were reproducibly yielded in rather dilute CoCl2 solutions in the presence and absence of NaCl at 90 °C, respectively. The phase and size control of the products were achieved by varying both CoCl2 and NaCl concentrations. Polarized optical microscope observations revealed clear liquid crystallinity of colloidal suspensions of these high aspect-ratio platelets. The as-prepared α-Co(OH)2 containing interlayer chloride ions was intercalated with various inorganic or organic anions, keeping its high crystallinity and hexagonal platelike morphology.

本文言語English
ページ(範囲)13869-13874
ページ数6
ジャーナルJournal of the American Chemical Society
127
40
DOI
出版ステータスPublished - 2005 10月 12
外部発表はい

ASJC Scopus subject areas

  • 化学 (全般)

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