Facile controlled synthesis and growth mechanisms of flower-like and tubular MnO2 nanostructures by microwave-assisted hydrothermal method
Facile controlled synthesis and growth mechanisms of flower-like and tubular MnO2 nanostructures by microwave-assisted hydrothermal method
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DOI：
10.1016/j.jcis.2011.12.013
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发表时间：
2012-03-01
影响因子：
9.9
通讯作者：
Sun, Xueliang
中科院分区：
文献类型：
--
作者：
Li, Yongliang;Wang, Jiajun;Sun, Xueliang
采用微波辅助水热法，通过控制反应温度，在盐酸条件下对KMnO4进行简单分解，选择性地合成了水钠锰矿花状和α-管状MnO2纳米结构。用X射线衍射仪、场发射扫描电子显微镜、透射电子显微镜、高分辨电子显微镜、傅里叶变换红外光谱和拉曼散射光谱等技术对样品进行了详细的表征。虽然花状水钠锰矿-MnO2的生长可能遵循被广泛接受的Ostwald成熟过程，但我们基于我们的证据提出了纳米管状α-MnO2的形成机理，即通过定向附着过程组装纳米棒。(C)2011 Elsevier Inc.保留所有权利。
Birnessite flower-like and alpha-type tubular MnO2 nanostructures were selectively synthesized through simple decomposition of KMnO4 under hydrochloric acid condition by controlling reaction temperature using a microwave-assisted hydrothermal method. The as-prepared samples were characterized in detail by various techniques including X-ray diffraction, field emission scanning electron microscopy, transmission electron microscopy, high-resolution transmission electron microscopy, Fourier transform-infrared spectroscopy, and Raman scattering spectroscopy. While the growth of flower-like birnessite-MnO2 might follow a widely accepted Ostwald ripening process, we proposed a formation mechanism of the nanotubular alpha-MnO2 based on our evidence, which was assembly of nanorods through an "oriented attachment" process. (C) 2011 Elsevier Inc. All rights reserved.