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首页> 外文期刊>Chemistry: A European journal >Ultrafast Preparation of Monodisperse Fe3O4 Nanoparticles by Microwave-Assisted Thermal Decomposition
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Ultrafast Preparation of Monodisperse Fe3O4 Nanoparticles by Microwave-Assisted Thermal Decomposition

机译：微波辅助热分解超快制备单分散Fe 3 O 4纳米粒子

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摘要

Thermal decomposition, as the main synthetic procedure for the synthesis of magnetic nanoparticles (NPs), is facing several problems, such as high reaction temperatures and time consumption. An improved a microwave-assisted thermal decomposition procedure has been developed by which monodisperse Fe3O4 NPs could be rapidly produced at a low aging temperature with high yield (90.1%). The as-synthesized NPs show excellent inductive heating and MRI properties in vitro. In contrast, Fe3O4 NPs synthesized by classical thermal decomposition were obtained in very low yield (20.3%) with an overall poor quality. It was found for the first time that, besides precursors and solvents, magnetic NPs themselves could be heated by microwave irradiation during the synthetic process. These findings were demonstrated by a series of microwave-heating experiments, Raman spectroscopy and vector-network analysis, indicating that the initially formed magnetic Fe3O4 particles were able to transform microwave energy into heat directly and, thus, contribute to the nanoparticle growth.
机译：作为分解磁性纳米粒子（NPs）的主要合成方法，热分解面临着一些问题，例如高反应温度和时间消耗。已经开发出一种改进的微波辅助热分解程序，通过该程序可以在低时效温度下以高收率（90.1％）快速生产单分散的Fe3O4 NP。合成后的NP在体外显示出出色的感应加热和MRI特性。相反，通过经典的热分解法合成的Fe3O4 NPs的收率很低（20.3％），总体质量较差。首次发现，在合成过程中，除前体和溶剂外，磁性NP本身还可以通过微波辐射加热。通过一系列的微波加热实验，拉曼光谱和矢量网络分析证明了这些发现，表明最初形成的磁性Fe3O4颗粒能够将微波能量直接转化为热量，从而有助于纳米颗粒的生长。

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