【摘要】 以六偏磷酸钠为无机分散剂,通过CuCl沉淀的转化制备了纳米硫氰酸亚铜(CuSCN)粉体。讨论了粉体合成的原理及pH值、分散剂用量和反应物浓度对产物粒径的影响,其中pH值对产物的影响最大。实验原理一方面是利用了高溶度积的CuCl向低溶度积的CuSCN的逐渐转化过程;另一方面利用了无机分散剂双电层的作用。用透射电镜、扫描电镜、X射线衍射和红外光谱表征产物的形貌和结构。结果表明:当pH=6.7～7.2,分散剂质量分数w=0.05%,反应物摩尔浓度为0.3mol/L时,可以制备出粒径为80～90nm、粒度均匀且不含杂质的CuSCN粉体。更多还原

【Abstract】 Cuprous thiocyanate(CuSCN) nanoparticles were prepared by transformation of cuprous chloride,in which sodium hexa-metaphosphate is inorganic dispersant.Experimental principle and the factors that influence the size of particles were investigated.These factors include pH value,quantities of dispersant and the concentration of reactants.The greatest factor is pH value.Experi-mental principle can be explained by the gradually transformation process of CuCl to CuSCN and the double-layer effect of inorganic dispersant.Transmission electron microscope,scanning electron microscope,X-ray diffraction,and infrared spectroscopy were used to cha-racterize the particles.The result suggests that pure CuSCN nanoparticles with a even size of 80—90 nm are obtained when pH value is 6.7—7.2,mass fraction of dispersant is 0.05% and the concentration of reactants is 0.3 mol/L.更多还原