Surfactant-free wet chemical synthesis of Co(OH)2 nanodisks and nanorings
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In this paper, a facile, one-step hydrothermal method for synthesis of Co(OH)2 nanodisks and nanorings without using any surfactants is reported. As-prepared samples were thoroughly characterized and analyzed by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), etc. The results showed that the size of as-prepared Co(OH)2 nanodisks could be determined by controlling the concentration of NaOH (8–16 mM) while maintaining other reaction conditions (such as temperature, reaction time, and solution compositions) unchanged. Furthermore, hexagonal nanorings could be obtained by changing the molar ratio between Ni and Co precursors.
KeywordsCo(OH)2 Nanoring Nanodisk Hydrothermal Surfactant free
This project was financially supported by the National Natural Science Foundation of China (50902007 and 20973019), the 973 Program (010CB934701), as well as by the Specialized Research Fund for the Doctoral Program of Higher Education (20091102110035). Supports by the Fundamental Research Funds for the Central Universities are also acknowledged (No. YMF1002016).
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