采用化学镀法在多壁碳纳米管表面沉积钴-铁涂层.主要研究了镀液中钴盐和铁盐的摩尔比、络合剂浓度和镀液温度对镀层的影响.在钴-铁的摩尔比为9:1,络合剂浓度为0.32 mol/L,镀液温度为60 ℃时,可得到的较为平整的镀层,且镀层中钴-铁摩尔之和达90%以上.其他条件下,则会在镀层中出现金属颗粒或钴-铁含量过少的情况.
Multiwalled carbon nanotubes (MWCNTs) were electroless plated with cobalt-iron (Co-Fe) .Palladium-atom centers were formed on the surface of MWCNTs by a pretreatment before the plating.Three main parameters,the molar ratio of C_(Co)~(2+):C_(Fe)~(2+),the concentration of complexing agent,and the temperature of plating bath,were changed to investigate their effects,whereas the concentrations of metal salts and reducing agent and pH were kept unchanged.A layer of metal deposited neatly with a Co-Fe content above 90% was obtained when the molar ratio of C_(Co)~(2+):C_(Fe)~(2+) was 9:1,the concentration of complexing agent was 0.32 mol/L,and the temperature of plating bath was 60 ℃.Metal granules were obtained,or the content of Co-Fe was much less in the other conditions investigated.
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