采用超声波辅助沉淀法分别在单元掺杂、二元掺杂和不掺杂三种情况下制备了三种不同镍源的纳米氢氧化镍，研究三种阴离子（NO3－，Cl－，SO2－4）对产物晶相结构及稳定性的影响。结果表明：未掺杂时，半径较大的SO2－4离子有利于α‐Ni（OH）2的形成；在单掺杂Co（Ni2＋∶Co2＋＝1∶0．20）时，NO3－离子不仅有利于α‐Ni（OH）2的形成，而且可以使α‐Ni（OH）2在碱液中保持较高的稳定性；当复合掺杂Co／Cu（Ni2＋∶Co2＋∶Cu2＋＝1∶0．15∶0．05）时，三种镍源制得的样品均为纯α‐Ni（OH）2结构，但以Ni（NO3）2为镍源的α‐Ni（OH）2在碱液中结构稳定性较高，NiCl2次之，NiSO4较差。可见，α‐Ni（OH）2结构及稳定性既与掺杂情况有关，也与阴离子密切相关。
Nanometer nickel hydroxide with three kinds of nickel sources were synthesized by ultrason‐ic‐assisted precipitation under single , double and no doping condition . T he effect of three anions (NO3- ,Cl- ,SO2 -4 ) which comes from nickel sources on the crystal structure and stability of samples were investigated .The results indicate that the larger ion radius SO2 -4 is more in favor of the forma‐tion of α‐Ni(OH)2 in the case of undoping .In the single doped Co samples(Ni2+ ∶Co2+ =1∶0 .20) , NO3-anion is not only conducive to form α‐Ni(OH)2 ,but also can keep high stability of α‐Ni(OH)2 in alkali solution .When co‐doped Co/Cu(Ni2+ ∶Co2+ ∶Cu2+ =1∶0 .15∶0 .05) ,the samples which were prepared using three nickel sources are all pure α‐Ni(OH)2 structures ,however ,the stability of the nickel nitrate dopedα‐Ni(OH)2 in alkali solution is higher ,which is using Ni(NO3 )2 as nickel source , NiCl2 is lower ,NiSO4 is the lowest .It can be concluded that the structure and stability of α‐Ni(OH)2 is not only related to doping condition ,but also related with anions .
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