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首页> 外文期刊>Chemistry: A European journal >Controllable Synthesis of Nickel Hydroxide and Porous Nickel Oxide Nanostructures with Different Morphologies
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Controllable Synthesis of Nickel Hydroxide and Porous Nickel Oxide Nanostructures with Different Morphologies

机译：可控合成不同形态的氢氧化镍和多孔氧化镍纳米结构

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摘要

-Ni(OH)2 nanobelts, nanowires, short nanowires, and b-Ni(OH)2 nanoplates have been successfully prepared in high yields and purities by a convenient hydrothermal method under mild conditions from very simple systems composed only of NaOH, NiSO4, and water. It has been found that the ratio of NaOH to NiSO4 not only affects the morphology of the Ni(OH)2 nanostructures, but also determines whether the product is of the aor -crystal phase. A notable finding isthat porous NiO nanobelts were produced after exposure of the Ni(OH)2products to an electron beam for several minutes during transmission electron microscopy (TEM) observations. Another unusual feature is that rectangular nanoplates with many gaps were obtained. Furthermore, porous NiO nanobelts, nanowires, and nanoplates could also be obtained by annealing the as-prepared Ni(OH)2 products. A sequence of dissolution, recrystallization, and oriented attachment-assisted self-assembly of nanowires into nanobelts is proposed as a plausible mechanistic interpretation for the formation of the observed structures. The method presented here possesses several advantages, including high yields, high purities, low cost, and environmental benignity. It might feasibly be scaled-up for industrial mass production.
机译：-Ni（OH）2纳米带，纳米线，短纳米线和b-Ni（OH）2纳米板已通过简便的水热方法，在温和条件下，由仅由NaOH，NiSO4，和水。已经发现，NaOH与NiSO 4的比例不仅影响Ni（OH）2纳米结构的形态，而且还确定产物是否为主晶相。一个值得注意的发现是，在透射电子显微镜（TEM）观察期间，将Ni（OH）2产物暴露于电子束几分钟后，产生了多孔NiO纳米带。另一个不寻常的特征是获得了具有许多间隙的矩形纳米板。此外，还可以通过退火制备的Ni（OH）2产品获得多孔NiO纳米带，纳米线和纳米板。提出了一系列将纳米线溶解，重结晶和定向附着的辅助自组装成纳米带的方法，作为对观察到的结构形成的合理的机械解释。这里介绍的方法具有几个优点，包括高产量，高纯度，低成本和环境友好。它可能会扩大规模，以进行工业批量生产。

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