Preparation of Co ₃O ₄ Nanostructures via a Hydrothermal- Assisted Thermal Treatment Method by Using of New Precursors

摘要

Co_(3)O_(4)nanostructures have been synthesized via a hydrothermal-assisted thermal treatment process. A new complex formulated as [Co(py)_(2)(H_(2)O)_(2)(NO_(3))_(2)] was synthesized, and then used to prepare Co_(3)O_(4)nanostructures. Cubic phase of spinel Co_(3)O_(4)nanostructures with particle size of about 39?nm could be produced after calcination of the Co(OH)_(2)materials prepared with hydrothermal method at 160?°C for 15 h. Using of inorganic precursors decreased the time and temperature of Co_(3)O_(4)preparation. The effect of pH on the morphology of the product s synthesized by hydrothermal reactions was investigated. It was found that the best morphology was achieved on pH=8, where was not prepared any precipitation. In this method, we could decrease the reaction temperature in synthetic rout to fabricate Co_(3)O_(4)nanostructures. Nanostructures were characterized by SEM, TEM, X-ray diffraction (XRD), UV–visible, Fourier transformed infrared (FT-IR) spectroscopy and Nuclear magnetic resonance (~(1)H-NMR).