麦穗状钴镍合金微晶的合成研究

Preparation of wheat-like cobalt-nickel alloy microcrystals

以二价钴盐、镍盐为前驱体,以酒石酸钠为络合剂,以次亚磷酸钠为还原剂,采用水热还原法制得形貌新颖的麦穗状钴镍合金微晶。该微晶由厚度约为100 nm的纳米板在"主茎"两侧按一定的方向排列而成。采用扫描电镜(SEM)、电子能谱仪(EDS)、X射线衍射仪(XRD)对样品进行表征。考察了络合剂类型及用量、氢氧化钠用量对产品形貌的影响。结果表明:氢氧化钠是合成麦穗状微晶的关键,其用量直接影响产品的形貌;酒石酸钠作为络合剂对麦穗状结构的形成也起到了重要的作用。

Novel wheat-like cobalt-nickel alloy microcrystals were prepared by hydrothermal reduction method, with Co（Ⅱ ） and Ni （ Ⅱ ） salts as precursor, sodium tartrate as complexing agent, and with sodium hypophosphite as reducing agent.The wheat-like microcrystals were composed of nanoplates with an average thickness of about 100 nm,which arranged at both sides of the＇ main stem＇ in a certain direction.The samples were characterized by SEM, EDS, and XRD.The influences of sort and dosage of complexing agent as well as the dosage of sodium hydroxide on the morphology of samples were investigated. Results showed that sodium hydroxide was the key to synthesize wheat-like microcrystals and its dosage had a direct effect on the morphology of the samples.The complexing agent, sodium tartrate, also played a crucial role in the formation of wheat-like structure of the samples.