等离子体放电电解制备纳米氧化亚铜

Preparation of Nano Cuprous Oxide by Plasma Induced Cathode Discharge Electrolysis

采用非接触阴极等离子体放电电解法在硫酸铜水溶液中制备纳米氧化亚铜,分析不同浓度、放电电压和电解时间等因素对产物形貌及其组成的影响.结果表明:增加硫酸铜浓度有利于产物中氧化亚铜的形成;延长电解时间会使颗粒发生聚合,尺寸由100 nm增大至400 nm;电解电压升高,颗粒尺寸从200 nm减小到40 nm.发射光谱分析表明发光区域存在大量激发态铜原子和羟基自由基,构成了Cu_2O的形成机理.理论计算表明,等离子体电子激发温度为9 563 K,电场强度为2. 4×10~5V/m,弧柱射流速度为73 m/s.

Nano cuprous oxide(Cu 2O)powders were prepared by plasma induced cathode discharge electrolysis in CuSO 4 solution,and the components and morphology of the prepared particles were investigated by various concentrations,electrolysis voltage and time.The results showed that a higher concentration of solution had a positive effect on the formation of Cu2O phase.As the discharge time extended,the particles aggregated and the size increased from 100 nm to 400 nm.Increasing the voltage was beneficial for the refinement of particles from 200 nm to 40 nm.Emission spectrum analysis indicated that there existed hydroxyl radicals and Cu atoms in plasma emission area,which was suggested that the formation mechanism of Cu2O.Theoretical calculation showed that excitation temperature,the electric field intensity and the arc column jet velocity was 9 563 K,2.4×10^5 V/m,and 73 m/s,respectivively.