采用抗坏血酸液相还原法制备微纳米铜粉

发布时间：2018-03-08 17:28

本文选题：铜粉　切入点：抗坏血酸　出处：《中国有色金属学报》2017年04期 　论文类型：期刊论文

【摘要】：研究以抗坏血酸为还原剂、采用液相还原法制备微纳米铜粉过程中pH值、混合方式和混合速率对铜粉形貌和粒径的影响。采用X射线衍射仪(XRD)和扫描电子显微镜(SEM)对合成产物进行表征。结果表明:液相反应溶液体系的pH值对反应产物的物相及其形貌有决定性的影响;当p H值控制为3~8时,还原产物为纯铜相;当p H为9~12时,产物是金属Cu与Cu_2O混合相;当p H值高于13时,还原产物为Cu_2O相;反向滴定即CuSO_4溶液向抗坏血酸溶液中滴定时制备的铜粉颗粒粗大呈微米级,正向滴定获得的铜粉细小呈亚微米级;以快速倾倒方式获得的铜粉颗粒尺寸分布窄且分散性良好,以慢速滴注获得的铜粉的尺寸与形状与前者的相近,但分布不均匀。
[Abstract]:Using ascorbic acid as reducing agent, the pH value in the process of preparation of nano-copper powder by liquid-phase reduction was studied. The effects of mixing mode and mixing rate on the morphology and particle size of copper powder were investigated by X-ray diffractometer (XRD) and scanning electron microscopy (SEM). The results showed that the pH value of liquid phase reaction solution system was the best for the reaction product. The phase and its morphology have a decisive effect. When pH value is 3 ~ 8:00, the reduction product is pure copper phase, when pH is 9 ~ 12:00, the product is a mixed phase of Cu and Cu_2O, when pH value is higher than 13:00, the reduction product is Cu_2O phase. In reverse titration, when CuSO_4 solution is titrated to ascorbic acid solution, the particle size of copper powder is of the size of micron, the particle size of copper powder obtained by forward titration is submicron, the size distribution of copper powder obtained by rapid tipping is narrow and the dispersion of copper powder is good. The size and shape of the copper powder obtained by slow dripping are similar to those of the former, but the distribution is not uniform.
【作者单位】：东北大学材料各向异性与织构教育部重点实验室;东北大学中荷生物医学与信息工程学院;
【基金】：国家自然科学基金资助项目(61372014)~~
【分类号】：TB383.3;TG146.11

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