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首页> 外文期刊>Journal of industrial and engineering chemistry >Preparation of silver nanoparticles on the surface of fine magnetite particles by a chemical reduction
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Preparation of silver nanoparticles on the surface of fine magnetite particles by a chemical reduction

机译：通过化学还原在细磁铁矿颗粒表面制备银纳米颗粒

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摘要

We demonstrate a modified polyol process to synthesize silver nanoparticles on the surface of larger magnetite nanoparticles. The overall process consists of two step reactions. First the magnetite particles of 100-200 nm in diameter are functionalized with a coupling agent 3-mercaptopropyltrimethoxysilane (MPTMS) through a sol-gel reaction. The functionalization of the magnetite surface is confirmed with IR spectra. For the second step silver nitrate is reduced at the site of thiol groups of the functionalized magnetite surface with ethylene glycol (EG) and polyvinylpyrrolidone (PVP). It was observed that silver nanoparticles were formed on the surface of the magnetite particles from transmission electron microscopy images and chemical composition analysis with energy dispersive spectrometer.
机译：我们展示了一种改性的多元醇工艺，可以在较大的磁铁矿纳米颗粒表面合成银纳米颗粒。整个过程由两步反应组成。首先，通过溶胶-凝胶反应用偶联剂3-巯基丙基三甲氧基硅烷（MPTMS）对直径为100-200 nm的磁铁矿颗粒进行功能化。红外光谱证实了磁铁矿表面的功能化。第二步，用乙二醇（EG）和聚乙烯吡咯烷酮（PVP）在功能化磁铁矿表面的巯基上还原硝酸银。通过透射电子显微镜图像和使用能量色散光谱仪的化学组成分析，观察到在磁铁矿颗粒的表面上形成了银纳米颗粒。

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