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基于竹炭基活性炭电极的电吸附去离子性能的研究 总被引:3,自引:0,他引:3
在高温和空气隔绝的条件下利用竹节炭化制备高比表面积活性炭,以竹炭基活性炭作电极的吸附材料,考察了活性炭电极在通电的情况下对溶液中金属离子的电吸附去除性能,详细研究了电压、两电极片间距和溶液的pH值对电容去离子效果的影响.结果表明,当电压为1.55V、电极片间距为2.0cm、pH值为5.16时,电极的去离子性能达到最佳状态,对不同类型金属离子的去除效果次序分别为:Cu2 >Cr3 ;Cu2 >Pb2 >Cr3 >Cd2 >Ca2 >Mg2 ;Na >K . 相似文献
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The electrochemical behavior of CoCl2 in 1-butyl-3-methylimidazolium hexafluorophosphate ([bmim]PF6) was investigated by cyclic voltammetry. The cyclic voltammograms were obtained from electrochemical measurement under different temperatures, and the reversible behavior for Co^2+/Co^3+ redox couple on glassy carbon electrode in [bmim]PF6 was confirmed by the characteristic of the peak currents. The diffusion coefficients (about 10^-11m^2/s) of Co^2+ in [bmim]PF6 under different temperatures were evaluated from the dependence of the peak current density on the potential scan rates in cyclic voltammograms. It is found that the diffusion coefficient increases with increasing temperature. Diffusion activation energy of Co^2+ in [bmim]PF6 is also calculated to be 23.4 kJ/mol according to the relationship between diffusion coefficient and temperature. 相似文献
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电镀填孔存在填孔爆发期,即在填孔爆发期内盲孔底部和面铜的电沉积速率之比逐渐达到最大值,其中电流密度对填孔爆发期以及爆发前后盲孔内外铜层的电沉积速率变化有较大影响,若能了解其规律可帮助优化电镀参数,以期望缩短电镀填孔时间,获得较好填孔效果。在不同电流密度及盲孔孔径下,电镀填孔不同时期(初始期、爆发期、末期)持续时间以及填孔过程中盲孔底部、面铜电沉积速率的变化规律,并在不同填孔时间段内使用不同电镀参数进行电镀填孔。研究表明:在电镀填孔不同时期采用不同电镀参数组合,能缩短电镀填孔时间,获得较好盲孔填平效果。 相似文献
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The electrochemical behavior of CoCl2 in 1-butyl-3-methylimidazolium hexafluorophosphate ([bmim]PF6) was investigated by cyclic voltammetry. The cyclic voltammograms were obtained from electrochemical measurement under different temperatures, and the reversible behavior for Co2 /Co3 redox couple on glassy carbon electrode in [bmim]PF6 was confirmed by the characteristic of the peak currents. The diffusion coefficients (about 10-11m2/s) of Co2 in [bmim]PF6 under different temperatures were evaluated from the dependence of the peak current density on the potential scan rates in cyclic voltammograms. It is found that the diffusion coefficient increases with increasing temperature. Diffusion activation energy of Co2 in [bmim]PF6 is also calculated to be 23.4kJ/mol according to the relationship between diffusion coefficient and temperature. 相似文献
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低阴极沉积电位对铝合金表面硅烷膜层的影响 总被引:1,自引:0,他引:1
在低阴极沉积电位条件下,使用表面活性剂改性硅烷溶液,实现了双-1,2-[γ(三乙氧基)硅丙基]四硫化物(BTSPS)在铝合金电极表面的电化学沉积,新的临界沉积电位(NCCP)约为-1.6 V.研究表明,在低阴极沉积电位下铝合金表面能得到更厚、更致密的硅烷膜层,并且在改性后溶液中制备的膜层具有较高的极化阻力.表面活性剂的加入可以降低沉积时析氢的影响,提高硅烷沉积性能.临界沉积电位的降低,使得硅烷覆盖的铝合金电极比临界沉积电位(-0.8 V)下的电极具有更好的抗腐蚀性能. 相似文献
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