Cu/Cu_2O材料的制备及形貌调控研究

目的一步制备和调控Cu/Cu_2O材料。方法采用水热法合成Cu/Cu_2O材料,通过改变反应时间、温度,原料投料量以及乙醇和水混合溶液中溶剂比等参数来调控Cu/Cu_2O复合材料的晶体形貌和Cu含量。结果增加氨水和甲酸使用量会明显提升Cu/Cu_2O复合材料中的Cu含量,硝酸铜和混合溶液(乙醇+水)中水量增加会使Cu/Cu_2O复合材料中Cu含量减少,而反应时间和反应温度均不会使复合材料中Cu量发生变化。氨水和甲酸使用量的增加,会使样品从菜花状、正八面体或十二面体向类球状转变。而硝酸铜和混合溶液(乙醇+水)中水量增加恰好使得样品形貌向相反方向变化。另外,反应温度过高会使得晶体向正八面体转变并且逐渐出现孔隙。结论通过改变样品合成参数可成功调控Cu/Cu_2O复合材料中Cu含量和形貌。

Preparation and Shape Control of Cu/Cu2O Hybrids

Objective Preparation of Cu/Cu2O hybrids and its control of morphology in only one-step. Methods Crystal morphology and copper content of the sample have tuned by changing the reaction time, temperature, usage amount of raw material, the proportion of the mixed solution. Results The copper content in the Cu/Cu2O hybrids increased significantly with the increasing of the usage amount of ammonia and formic acid, but decreased with the increasing of the usage amount of copper nitrate and the content of water in the mixed solution. However, no obvious vary in the copper content of Cu/Cu2O hybrids with the changes of reaction temperature and time. Moreover, the morphology of the sample changed from cauliflower shape, six-foot shape, regular octahedron, dodecahedron to globular with the increasing of the usage amount of ammonia and formic acid, but he changes of morphology is opposite with the increasing of the usage amount of copper nitrate and the content of water in the mixed solution. In addition, the morphology of crystal change to regular octahedron and pore began to emerge with the increasing of the reaction temperature. Conclusion Cu content in the Cu/Cu2O hybrids and morphology can successfully regulated by changing the synthesis parameters.