| Pt3Co核-Pt壳型纳米粒子的制备及磁性 |
| Synthesis and Magnetic Property of Pt3Co Core-Pt Shell Nanoparticles |
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| 摘要: |
| 关键词: Pt3Co纳米粒子 Pt3Co核-Pt壳结构纳米粒子 吸氢再还原法 磁性 |
| 基金项目: |
| Abstract: Pt3Co alloy nanoparticles were prepared by the reduction of H2PtCl6 and Co(OOCCH3)2 using NaBH4 as a reducing agent. The Pt3Co core-Pt shell nanoparticles (Pt3Co@Pt) were synthesized using hydrogen absorption reduction and characterized by plasma-atomic emission spectrometry (ICP), transmission electron microscopy (TEM), X-ray diffraction (XRD) and SQUID magnetometer. The results show that average size of Pt3Co@Pt nanoparticles is 3.6 nm with a standard deviation of 0.9 nm. Heating Pt3Co nanoparticles in air at 700 ℃ for 1 h, Co in Pt3Co nanoparticles was oxidized to Co3O4 and CoO; while no oxidation tendency was detected for Pt3Co@Pt nanoparticles. The crystallize structure of Pt3Co@Pt changed from the face centered cube (fcc) to the face centered tetragonal (fct) after the heating treatment. The coercivity of the heated Pt3Co@Pt reached to 276 Oe at room temperature. |
| Keywords: Pt3Co nanoparticle Pt3Co core-Pt shell nanoparticle method of hydrogen absorption reduction magnetic property |
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| 戴兢陶,杜玉扣,狄国庆,华南平,杨平.Pt3Co核-Pt壳型纳米粒子的制备及磁性[J].无机化学学报,2006,22(10):1908-1910. |
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