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Preparation of Copper Fine Particles from Waste Copper by Chemical Reduction Method  

Kim, Yoon-Do (Department of Chemical and Biochemical Engineering, Konyang University)
Song, Ki Chang (Department of Chemical and Biochemical Engineering, Konyang University)
Song, Jong-Hyeok (Recytech Korea Co. Ltd., Annex Research Institute)
Publication Information
Korean Chemical Engineering Research / v.45, no.6, 2007 , pp. 560-565 More about this Journal
Abstract
Copper fine particles, ranging from $0.11{\mu}m$ to $0.64{\mu}m$ in average size, were prepared by a chemical reduction method using hydrazine ($N_2H_4$) as a reduction agent in waste copper solutions. The effect of the amount of hydrazine addition was investigated on the properties of the obtained powders. Also, the effect of the addition of dispersing agents [Polyvinyl alcohol (PVA), polyvinyl pyrrolidone (PVP)] during particle synthesis was studied. The powders, obtained from 1 M waste copper solutions, showed the mixtures of Cu and $Cu_2O$ crystals at low hydrazine addition amounts of 0.8 mol and 1.0 mol, while those exhibited pure Cu crystals at adequate hydrazine addition amount of 0.12 mol. The average size of the Cu powders decreased with increasing the concentrations of hydrazine and dispersing agents. The addition of PVA to the solutions as a dispersing agent was more effective than that of PVP in preventing the aggregation of particles.
Keywords
Chemical Reduction; Cu Fine Particles; Waste Copper; PVA; PVP; Hydrazine;
Citations & Related Records
Times Cited By KSCI : 6  (Citation Analysis)
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