Facile Microwave-Assisted Synthesis and Magnetic and Gas Sensing Properties of Fe3O4 Nanoroses

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• 作者：Zhihui Ai ; Kejian Deng ; Qianfen Wan ; Lizhi Zhang ; Shuncheng Lee
• 刊名：Journal of Physical Chemistry C
• 出版年：2010
• 出版时间：April 15, 2010
• 年：2010
• 卷：114
• 期：14
• 页码：6237-6242
• 全文大小：341K
• 年卷期：v.114,no.14(April 15, 2010)
• ISSN：1932-7455

文摘

In this study, we developed a facile microwave-assisted ethylene glycol approach to synthesize Fe₃O₄ nanoroses in the presence of the PEO-PPO-PEO block copolymer (P123). The resulting products were systematically characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM), and Fourier transform infrared absorption spectroscopy (FT-IR). The characterization results revealed that the Fe₃O₄ nanoroses were formed by P123 directed assembly of nanoparticles under microwave irradiation. Besides size and morphology-dependent magnetic properties, the as-prepared nanocrystalline Fe₃O₄ nanoroses exhibited high sensitivity and good reversibility for gas-sensing of ethanol vapor at room temperature. Our results suggest these Fe₃O₄ nanoroses are promising materials for magnetic and sensing applications.