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A Facile Hydrothermal Route to Flower‐Like Cobalt Hydroxide and Oxide
Author(s) -
Yang LiXia,
Zhu YingJie,
Li Liang,
Zhang Ling,
Tong Hua,
Wang WeiWei,
Cheng GuoFeng,
Zhu JieFang
Publication year - 2006
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.200600553
Subject(s) - cobalt hydroxide , ethylene glycol , cobalt , chemistry , high resolution transmission electron microscopy , hydroxide , hydrothermal circulation , selected area diffraction , nanosheet , oxide , thermal decomposition , cobalt oxide , inorganic chemistry , nuclear chemistry , chemical engineering , transmission electron microscopy , organic chemistry , electrochemistry , electrode , engineering
Flower‐like cobalt hydroxide [β‐Co(OH) 2 ] consisting of nanosheet networks has been synthesized by a hydrothermal method from Co(CH 3 COO) 2 · 4H 2 O in mixtures of water and glycerol/ethylene glycol at 200 °C. The morphology and phase of the cobalt hydroxide can be controlled by adjusting the experimental parameters that include cobalt acetate concentration and the volume ratio of water to glycerol/ethylene glycol. The possible formation mechanism of flower‐like cobalt hydroxide is discussed on the basis of experimental results. Cobalt oxide (Co 3 O 4 ) flowers have also been obtained by thermal decomposition of cobalt hydroxide flowers in air at 400 °C. The products were characterized by powder XRD, TEM, selected‐area electron diffraction (SAED), high resolution TEM (HRTEM), and field‐emission SEM (FESEM). (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2006)
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