| Cu-based oxide is an important metal oxide, which has wide potential in many fields. Firstly, cuprous oxide(Cu2O),a p-type semiconductor with unique optical and magnetic properties, has potential applications in solar energy conversion , electronics, magnetic storage, catalysis ,and gas sensors. Another Cu-based oxide, CuO is also a potential material with many applications in catalysis, gas sensing.In this paper, as the raw material, copper sulfate solution with different experiment programs were prepared by a variety of morphology of Cu2O particles. X-ray diffraction (XRD), scanning electron microscopy (SEM), UV-visible spectroscopy (UV-Vis) and other means, the product obtained the crystal structure, size and morphology, reactant concentration, reaction time variation of studied.Sodium citrate in the reaction was a surfactant. With CTAB and potassium hydroxide present, the final production was two-dimensional sheet CuO. To study the reaction mechanism, a lot of parallel experiments has been done. Cu2+ reacts with OH- and Cu(OH)2 was formed. When the solution of Cu(OH)2 concentration is high enough, crystallization process began. Cu(OH)2 will dehydration to be CuO in the condition of heating. Adjusting the OH-and Cu2+ molar ratio, the number of nucleation can be controlled, Free Cu2+ in solution was reduced thus control the rules of the final degree of crystalline CuO. The experiment of synthesis of Cu2O, as the influence of ammonia, sodium citrate works as both reductant and surface-active agent. The sample presents a star structure. This structure is extended over time by the six-sided crystals gradually changing shape.In the reaction, each reactant play different roles, ions in solution demonstrated different selective adsorption to the crystal during the crystallization process. In different conditions, each kinds of factors affecting the strength shown by the different, thus affecting the growth rate of different crystal to change over time show a different morphology structure.
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