Abstract In this paper, nanostructured nickel-phosphide compounds: (a) nanosheets, (b) nanoflowers-like and (c) polyhedral nanoparticles have been prepared by chemical reduction method. The effect of reduction agents: (a) sodium hypophosphite and (b) sodium borohydride and annealing at T = 450 °C under argon (Ar) gas on the structural, optical and magnetic properties of compounds have been investigated. The prepared samples were analyzed by X-ray diffraction analysis (XRD), field emission scanning electron microscopy (FE-SEM), UV–Vis spectroscopy and the vibrating sample magnetometer (VSM). The X-ray diffraction results of nanosheet and polyhedral nanoparticles samples showed that before annealing, they had an amorphous structure and after annealing, a combination of three (Ni3P), (Ni) and NiO phases and Ni single phases appeared. Surface morphology were examined by (FE-SEM) images and it was found that particles were flat and nanosheet before annealing and nanoflowers-like after annealing. The band gap of nanosheet nanoparticle is increased after annealing from 5.86 eV to 6.0 eV and polyhedral nanoparticles is reduced after annealing from 5.24 eV to 5.25 eV. The magnetic properties of the sample also showed that before annealing the nano-powders had paramagnetic property and after annealing, they became soft ferromagnetic.

中文翻译：

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Ni3P-Ni 化合物纳米粒子的结构、光学和磁性的合成和研究：还原剂和络合剂的影响

摘要 在本文中，纳米结构的磷化镍化合物：（a）纳米片，（b）纳米花状和（c）多面体纳米粒子已通过化学还原方法制备。已经研究了还原剂：(a) 次磷酸钠和 (b) 硼氢化钠以及在氩气 (Ar) 下在 T = 450 °C 下退火对化合物结构、光学和磁性能的影响。制备的样品通过 X 射线衍射分析 (XRD)、场发射扫描电子显微镜 (FE-SEM)、UV-Vis 光谱和振动样品磁强计 (VSM) 进行分析。纳米片和多面体纳米颗粒样品的 X 射线衍射结果表明，在退火前，它们具有无定形结构，在退火后，出现了（Ni3P）、（Ni）和 NiO 三种相和 Ni 单相的组合。通过（FE-SEM）图像检查表面形貌，发现退火前颗粒为扁平纳米片状，退火后呈纳米花状。纳米片纳米粒子的带隙在退火后从 5.86 eV 增加到 6.0 eV，多面体纳米粒子在退火后从 5.24 eV 减少到 5.25 eV。样品的磁性也表明纳米粉体在退火前具有顺磁性，退火后变为软铁磁性。