摘要
本文采用化学共沉淀法制备得到纳米NiCu复合粉,并对其结构进行了表征。在Ni2+Cu2+混合溶液中,以N2H4.H2O为还原剂直接进行还原反应。最佳合成条件为:(Ni2+和Cu2+)浓度为0.25 mol/L,反应液的pH值为9.5左右,nEDTA/nCu2+=3.5,反应温度控制在50℃左右。经检测,纳米NiCu复合粉中Ni和Cu分别以晶态形式存在;纳米NiCu复合粉的平均粒径为60 nm左右,分散状态良好。
In this paper, NiCu composite nanopowder has been prepared by chemical codeposition and its structure has been detennined by XRD, TEM and EDS. The aqueous mixture, of Ni^2＋ and Cu^2＋ was used .as the raw material, and N2H4· H2O acted as the reducing agent. The optimum conditions of the synthesis of NiCu composite nanopowder was as follows： （Ni^2＋ ＋ Cu^2＋ ） = 0.25mol/L, nEDTA/nCu^2＋ = 3 5, PH = 9.5, and temperature 50℃. Results show that Ni and Cu are crystal in the NiCu composite nanopowder and its average size is about 60nm.
关键词
纳米
NiCu复合粉
制备
化学还原
nanometer
NiCu composite nanopowder
chemical reduction
synthesis
