均相还原法制备氧化亚铜微晶及粒径控制

Preparation and Particle Sizes Controlling of Cuprous Oxide Microcrystals by Homogeneous Reduction

利用均相还原法,以硫酸铜、亚硫酸钠为原料,在HAc-NaAc缓冲溶液中制备出形状均一、分散性好的氧化亚铜微晶。利用X射线粉末衍射仪(XRD)、扫描电镜(SEM)及激光粒度分析仪对产物进行物相、形貌和粒径分析。正交实验分析结果表明,影响氧化亚铜产物粒径的主要因素依次为反应物浓度、反应时间、反应温度。当反应物浓度为0.05mol/L、反应温度为358K、反应时间为2h时,产物的平均粒径为300nm。探讨了制备氧化亚铜的粒径控制方法及机理,通过对反应条件的控制可以制得粒径为0.3～3.0μm的球形立方相氧化亚铜微晶。

Cuprous oxide microcrystals are prepared by homogeneous reduction using CuSO4 · 5H2O and Na2SO3. All the powders are characterized by X-rays diffraction（XRD）, scanning electron microscopy（SEM） and Malvern Zetasizer Nano ZS laser particle size analyzer. The results show that all the microcrystals have even grain size and good dispersibility. The results of the orthogonal test show that there are three influencing factors on the granularity of Cu2O： reagent concentration, reaction time and temperature. The optimum conditions are 0. 05mol/L（CuSO4 · 5HzO and Na2SO3）, 358K and 2h, the granularity of the powders obtained is 300nm, granularity distributing is 60nm. Diffusion and aggregation mechanisms are used to explain the formation of different granularity of cuprous oxide. 0. 3-3. 0μm global cubic Cu2O is obtained through controlling the conditions.