等离子体放电电解制备纳米氧化亚铜
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摘要
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_2 O) pow ders w ere prepared by plasma induced cathode discharge electrolysis in CuSO_4 solution, and the components and morphology of the prepared particles w ere investigated by various concentrations, electrolysis voltage and time. The results show ed that a higher concentration of solution had a positive effect on the formation of Cu_2 O phase. As the discharge time extended,the particles aggregated and the size increased from 100 nm to 400 nm. Increasing the voltage w as 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,w hich w as suggested that the formation mechanism of Cu_2 O. 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.
Nano cuprous oxide( Cu_2 O) pow ders w ere prepared by plasma induced cathode discharge electrolysis in CuSO_4 solution, and the components and morphology of the prepared particles w ere investigated by various concentrations, electrolysis voltage and time. The results show ed that a higher concentration of solution had a positive effect on the formation of Cu_2 O phase. As the discharge time extended,the particles aggregated and the size increased from 100 nm to 400 nm. Increasing the voltage w as 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,w hich w as suggested that the formation mechanism of Cu_2 O. 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.
引文
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[10] Oishi T,Kawamura H,Ito Y. Formation and size control of titanium particles by cathode discharge electrolysis of molten chloride[J]. Journal of Applied Electrochemistry,2002,32(7):819-824.
[2]李如,闫雪峰,于良民,等.氧化亚铜微/纳米结构的形貌可控制备及光催化和防污性能[J].无机化学学报,2014,30(10):2258-2269.(Li Ru,Yan Xue-feng,Yu Liang-min,et al. Dependence of micro/nano-Cu2O structures:controlled morphology synthesis,and photocatalytic and antifouling property[J]. Chinese Journal of Inorganic Chemistry,2014,30(10):2258-2269.)
[3]刘儒平,杜利东,岳钊,等. Cu2O纳米晶制备及其在乙醇气体传感器中的应用[J].传感器与微系统,2013,32(12):138-141.(Liu Ru-ping,Du Li-dong,Yue Zhao,et al. Preparation of Cu2O nanocrystalline and its application in ethanol gas sensor[J]. Transducer and Microsystem Technologies,2013,32(12):138-141.)
[4] Yin H,Wang X,Wang L,et al. Cu2O/Ti O2heterostructured hollow sphere with enhanced visible light photocatalytic activity[J]. Materials Research Bulletin,2015,72:76-183.
[5] Das K,De S. Optical and photoconductivity studies of Cu2O nanowires synthesized by solvothermal method[J]. Journal of Luminescence. 2009,129(9):1015-1022.
[6] Goli M,Haratizadeh H,Abrishami M E. Growth of flower-like copper oxide nanostructures by glow discharge in water[J].Ceramics International,2014,40:16071-16075.
[7] Yao W T,Yu S H,Zhou Y,et al. Formation of uniform CuO nanorods by spontaneous aggregation:selective synthesis of CuO,Cu2O,and Cu nanoparticles by a solid-liquid phase arc discharge process[J]. Journal of Physical Chemistry B,2005,109(29):14011-14016.
[8] Liu J D,He B B,Chen Q,et al. Plasma electrochemical synthesis of cuprous oxide nanoparticles and their risible-light photo catalytic effect[J]. Electrochimica Acta,2016,222:1677-1681.
[9] Lu Y, Ren Z, Yuan H, et al. Atmospheric-pressure microplasma as anode for rapid and simple electrochemical deposition of copper and cuprous oxide nanostructures[J]. Rsc Advances,2015,77(5):62619-62623.
[10] Oishi T,Kawamura H,Ito Y. Formation and size control of titanium particles by cathode discharge electrolysis of molten chloride[J]. Journal of Applied Electrochemistry,2002,32(7):819-824.
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