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以Cu(NO_3)_2为原料,NaOH为沉淀剂,蒸馏水为溶剂,采用化学沉淀法结合超声场作用制备出了纳米氧化铜颗粒。经XRD、TEM、差热扫描分析(DSC)以及粒度分析仪检测,所获得颗粒平均粒度达到55nm。此方法制备的氧化铜颗粒形状规则、粒度分布范围窄、纯度高。同时探讨了超声场作用下的机理以及对制备工艺过程和最终产物的影响。讨论了溶液的pH值、反应物的浓度、表面活性剂、反应温度和反应时间对颗粒尺寸的影响。在探讨如何保持纳米颗粒的分散性方面,采用了多种表面活性剂进行试验,发现聚乙二醇(6000)对纳米氧化铜颗粒的保存有着显著的效果,静置20天几乎看不到任何沉降现象。
Using Cu (NO_3) _2 as raw material, NaOH as precipitating agent and distilled water as solvent, nanometer copper oxide particles were prepared by chemical precipitation combined with ultrasonic field. XRD, TEM, differential scanning calorimetry (DSC) and particle size analyzer detection, the average particle size obtained 55nm. The copper oxide particles prepared by the method have the regular shape, the narrow particle size distribution range and the high purity. The mechanism of the ultrasonic field and the influence on the preparation process and the final product were also discussed. The effects of solution pH, reactant concentration, surfactant, reaction temperature and reaction time on particle size were discussed. In discussing how to maintain the dispersibility of nanoparticles, a variety of surfactants were tested and found that polyethylene glycol (6000) has a significant effect on the preservation of nano-copper oxide particles, barely see any standing for 20 days Subsidence phenomenon.