单元和多元取代纳米氢氧化镍晶相及其结构稳定性研究  

Crystal Phase and Structure Stability of Single or Multi-element Substituted Nano-Nickel Hydroxide

作　　者：韩全勇[1] 朱燕娟[1] 苗成成[1] 罗洁[1] 赵韦人[1] 张伟[1] 赵腾起 郑炜健 

机构地区：[1]广东工业大学物理与光电工程学院,广州510006

出　　处：《无机化学学报》2014年第7期1496-1502,共7页Chinese Journal of Inorganic Chemistry

基　　金：国家自然科学基金(No.11304045);广东省自然科学基金(No.S2012010009955);广州市科技计划(No.2013j4100011)资助项目

摘　　要：以硝酸镍为镍源,硫酸钴、硫酸铜、硫酸铝为掺杂原料,采用超声波辅助沉淀法分别制备了单元和多元取代纳米氢氧化镍。用X射线衍射(XRD)、傅里叶变换红外光谱(FTIR)、激光粒度仪(PSD)及电子显微镜(TEM、SEM)对样品晶相结构、形貌、粒度分布等进行了表征,研究了单元或多元取代对产物晶相及其结构稳定性的影响。结果表明,样品均为纳米级Ni(OH)2,随着掺杂元素种类的增多,其一次粒子变得细小,团聚加重,二次粒子粒径增大。样品中α-Ni(OH)2比例随取代元素增多而增大。相对于Co单元和Co/Cu双元取代,Co/Cu/Al三元取代的样品其晶相结构更稳定,在碱液中浸泡3周后仍为纯α-Ni(OH)2。在相同掺杂比例下,Cu取代比Co取代更有利于α-Ni(OH)2的生成,但Co取代的样品结构稳定性优于Cu取代的样品。The single and multi-element substituted nano-nickel hydroxide was synthesized by uhrasonic-assisted precipitation, using nickel nitrate as nickel source and cobalt sulfate, cupric sulfate, aluminum sulfate as doping materials. The crystal structure, morphology and particle size distribution of all samples were characterized by X- ray diffraction （XRD）, infrared spectroscopy（FTIR）, laser particle size analyzer （PSD） and electron microscope （TEM, SEM）. The effect of the single and multi-element substitution on the crystal phase and structure stability was investigated. The results show that the samples were nano-Ni（OH）2, and the smaller primary particles become aggregation, but the secondary particles size got larger with the increase of doping elements. The proportion of α-Ni（OH）2 increased with the rising of substitution elements. Compared with Co single and Cu/Co substitution, the crystal structure of Cu/Co/Al triple substituted sample was more stable , and which still keep pure α-Ni（OH）2 after soaking in alkali liquor for three weeks. The Cu substitution is more favorable to produce α-Ni（OH）2 than the Co substitution under the same doping ratio, but converse for the structure stability.

关 键 词：单元或多元取代 氢氧化镍晶相 结构稳定性 EDS FTIR PSD 

分 类 号：O646[理学—物理化学] TQ174[理学—化学]