Microwave assisted synthesis of nickel nanostructures by hydrazine reduction route: Effect of solvent and capping agent on morphology and magnetic properties
Microwave assisted synthesis of nickel nanostructures by hydrazine reduction route: Effect of solvent and capping agent on morphology and magnetic properties
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DOI：
10.1016/j.matchemphys.2015.12.014
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发表时间：
2016-02-15
影响因子：
4.6
通讯作者：
Malghe, Yuvraj S.
中科院分区：
文献类型：
--
作者：
Kashid, Sahebrao B.;Raut, Rajesh W.;Malghe, Yuvraj S.
肼还原法是合成镍纳米结构最简单、应用最广泛的方法之一。然而，使用该方法难以实现具有所需特征的高度单分散纳米颗粒的大规模生产。在这项研究中，我们报告，微波辅助肼还原过程的评价和溶剂，即水和乙二醇和封端剂的影响。结果表明，当肼（N_2H_4）与镍Ni（II）的摩尔比为化学计量比时，前者不能得到产物，而后者的反应表明，封端剂的存在对产物的形貌和磁性能有明显的影响。在CTAB存在下，在乙二醇中反应，得到长度约100 nm，直径4-6 nm的一维纳米棒，而在没有CTAB的情况下，得到高度团聚的球。磁性研究表明该产品具有铁磁性。封端剂对磁性能也有影响。在水溶液和乙二醇介质中，所获得的产物表现出较低的饱和磁化强度，而在含有CTAB的乙二醇中获得的产物具有最高的饱和磁化强度，为47.86 emu g（-1）。(C)2015爱思唯尔B. V.保留所有权利。
The hydrazine reduction is one of the simplest and widely used method for the synthesis of nickel nanostructures. However, large-scale production of highly monodisperse nanoparticles with desired features is difficult to achieve using this method. In this study, we report, an evaluation of microwave assisted hydrazine reduction process and the effect of solvents namely water and ethylene glycol and capping agent thereupon. The study revealed that the reaction in the former failed to give the product when hydrazine (N2H4) and nickel Ni(II) are in the stoichiometric molar ratio, while the reaction in the later shows that the presence of the capping agent has pronounced effect on the morphology and magnetic properties of the product. Reaction in ethylene glycol in the presence of CTAB, gave 1D nanorods of about 100 nm in length and 4-6 nm in diameter, while in the absence of CTAB highly agglomerated spheres, are obtained. The magnetic property studies indicated the ferromagnetic nature of the product. The magnetic properties are, also affected by capping agent. In both, aqueous and ethylene glycol media, the product obtained exhibit lower saturation magnetization, whereas the product obtained in ethylene glycol with CTAB has highest saturation magnetization, 47.86 emu g(-1). (C) 2015 Elsevier B.V. All rights reserved.