以(NH_4)_6Mo_7O_(24)·2H_2O和CuSO_4·5H_2O (Mo:Cu=60:40,质量比,下同)为原料,采用化学共沉淀制备Mo-Cu复合氧化物粉末,再经过氢还原得到Mo-Cu复合物纳米粉末.结果表明:化学共沉淀的条件是反应温度为(50±5) °C,pH 值为(5.1±0.1), 陈化时间为(8±1) h;Mo-Cu复合氧化物粉末粒度为20 nm;氢还原温度为650 °C,Mo-Cu复合物纳米粉末粒度小于100 nm.
Mo-Cu (Mo:Cu=60:40, mass ratio) predecessor powder was prepared by chemical co-precipitation taking (NH_)4)_6Mo_7O_(24)·2H_2O and CuSO_4·5H_2O as starting materials. And then the Mo-Cu predecessor powder was reduced by hydrogen in closed circulation system to prepare the Mo-Cu composite nano-powder. The results reveal that conditions of the chemical co-precipitation are that reaction temperature is (50±5) °C, pH value (5.1±0.1), and ageing time (9±1) h. Under the conditions mentioned above, the average particle size of the prepared the Mo-Cu predecessor powder is 20 nm. The hydrogen reduction temperature during closed circulation is 650 °C. The particle size of obtained Mo-Cu composite powder is less than 100 nm.
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