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CoCO3 particles with diverse morphologies were successfully synthesized through a solvothermal method using cobalt salt and urea as the reactants with the assistance of sodium dodecylsulphonate. Co3O4 particles which kept the spherical morphology were obtained by a subsequent calcinating process at a series of temperatures from 350 to 550°C. It is found that the average diameter of Co3O4 spheres decreases...
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