采用简单的液相法在室温下制备了八面体与球形的Cu2O粉体,使用扫描电镜（SEM）、X射线衍射仪（XRD）和分光光度计对产物的形貌、晶相和光催化性能进行了检测。结果发现氢氧化钠在控制晶体粒径和形貌方面起到了非常重要的作用,球形Cu2O颗粒尺寸比八面体形貌的Cu/Cu2O小,并提出了不同形貌Cu2O可能的生长机制。研究了在可见光下,所得Cu2O粉在静止状态下对甲基橙溶液的光催化降解效果,结果表明,与八面体形貌的Cu/Cu2O复合材料相比,短时间内,小颗粒球形Cu2O对甲基橙有更高的脱色性能;但经长时间放置于日光中,发现八面体形貌的Cu/Cu2O具有更好的光催化降解性能。
Cuprous oxides（Cu2O） with different shapes,such as spheres and octahedron,have been synthesized by facial wet-solution method at room temperature.Its structure,morphology and photo-catalytic performance were characterized by X-ray powder diffraction（XRD）,scan electron microscope（SEM） and spectrophotometer.The concentration of NaOH has significant effects on the formation and growth of these Cu2O particles.The possible growth mechanism of the Cu2O crystal was discussed.Its photo-catalytic activities in the degradation of methyl orange as the model pollutant using incandescence light as an energy source were investigated.The result indicates that the spherical Cu2O shows a superior photo-catalytic activity to methyl orange than octahedral Cu/Cu2O composite material at initial reaction time.However,octahedral Cu/Cu2O composite demonstrated better photo-catalytic activity and structure stability when presented in methyl orange solution for a long time about 25d.
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