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多元醇還原法制備N(xiāo)iPd磁性納米合金
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國(guó)家自然科學(xué)基金項(xiàng)目（50702037，50572072）；教育部留學(xué)回國(guó)人員科研啟動(dòng)基金；同濟(jì)大學(xué)青年優(yōu)秀人才培養(yǎng)行動(dòng)計(jì)劃


Preparation of Magnetic NiPd Nanoalloys via Polyol Reduction Process
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    摘要:

    采用多元醇還原法，以乙二醇為反應(yīng)溶劑和還原劑，PVP為穩(wěn)定劑，制備尺寸約30 nm、在極性溶劑中分散良好的NiPd納米粒子。采用XRD、ICP和TEM等手段對(duì)所制備的不同組成的納米粒子進(jìn)行表征，證明所制納米粒子為NiPd合金，采用PVP為穩(wěn)定劑有效地阻止了納米粒子的團(tuán)聚與氧化。所制備的納米粒子的磁學(xué)性質(zhì)及磁熱效應(yīng)結(jié)果表明，NiPd納米合金具有較大的矯頑力，表現(xiàn)為鐵磁性，且隨著組分中Ni含量的增加，納米合金的飽和磁化強(qiáng)度和磁熱效應(yīng)均增加，納米粒子在60 kHz、7.5 kA/m的交變磁場(chǎng)作用下，試樣的懸浮液升溫可達(dá)14 ℃左右，顯示出較高的磁熱性能。

    Abstract:

    Aqueously well-dispersed NiPd nanoparticles with a dimension of about 30 nm were prepared by a modified polyol reduction process, using glycol as both solvent and reductant, and PVP as stabilizing agent. The as-synthesized nanoparticles with different composition were characterized by XRD, ICP and TEM. It is proved that the nanoparticles are NiPd alloy, and the PVP prevents them from agglomeration and oxidation. The magnetic properties and heat effect under external alternating magnetic field reveal that the obtained NiPd nanoalloy is ferromagnetic material and has bigger coercive force; additionally, the saturation magnetization and heat generation ability of the nanoalloy are improved by the increasing of Ni content. When the nanoparticles were exposed to an external alternation magnetic field of 60 kHz and 7.5 kA/m, the samples show high heat generation ability, with the suspension temperature increasing by 14 ℃.

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艾凡榮,姚愛(ài)華,黃文旵,王德平,張 欣.多元醇還原法制備N(xiāo)iPd磁性納米合金[J].稀有金屬材料與工程,2010,39(1):153~156.[Ai Fanrong, Yao Aihua, Huang Wenhai, Wang Deping, Zhang Xin. Preparation of Magnetic NiPd Nanoalloys via Polyol Reduction Process[J]. Rare Metal Materials and Engineering,2010,39(1):153~156.]
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  • 收稿日期:2009-01-15
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