Nickel/Nickel Phosphide Core−Shell Structured Nanoparticles: Synthesis, Chemical, and Magnetic Architecture

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• 作者：Xianfeng Zheng ; Songliu Yuan ; Zhaoming Tian ; Shiyan Yin ; Jinhua He ; Kuili Liu ; Li Liu
• 刊名：Chemistry of Materials
• 出版年：2009
• 出版时间：October 27, 2009
• 年：2009
• 卷：21
• 期：20
• 页码：4839-4845
• 全文大小：1024K
• 年卷期：v.21,no.20(October 27, 2009)
• ISSN：1520-5002

文摘

Discrete, magnetically recyclable, and oxidation-resistant nanoparticles with nickel/nickel phosphide core−shell structure were synthesized through surface-phosphatizing Ni nanoparticles using triphenylphosphine as the phosphorus source. The Ni₂P shell thickness was tunable by changing the reaction time in the mild temperature organic solution. And it was shown that the chemical architecture of core−shell can be useful to prepare Ni₃P nanogranular films through the chemical combination of Ni₂P shell with inner Ni during annealing. The core−shell magnetic architecture can also be helpful in improving the magnetically thermal stability through the effective influence of surface anisotropy after magnetic surface modification. The mechanism could be used to guide the synthesis and application of similar core−shell structured nanomaterials.