Controlled synthesis and optical properties of 1D frog egg-like Mn(IO₃)₂/MnO₂ composite nanostructures with ultra-high aspect ratio

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• 作者：Limin Song^a ; ^{cbnk@yahoo.cn} ; Shujuan Zhang^b ; ¹ ; Xiaoqing Wu^c ; ^{wuxiaoqing@tjpu.edu.cn} ; Qingwu Wei^a
• 关键词：Mn(IO3)2/MnO2 micro and nanostructures ; Tunable shapes ; Hydrothermal method
• 刊名：Chemical Engineering Journal
• 出版年：2012
• 期刊代码：16_13858947
• 类别：ce
• 出版时间：1 April, 2012
• 卷：187
• 期：Complete
• 页码：385-390
• 文件大小：1430 K

摘要

The one-dimensional (1D) frog egg-like Mn(IO₃)₂/MnO₂ nanostructures with ultra-high aspect ratio are prepared by reaction of MnCl₂路4H₂O with KIO₃ using a mild hydrothermal method. Tunable shapes, including several three-dimensional structures (grass-, leaf-, and rose-like), can also be obtained by altering experimental conditions. The X-ray powder diffraction (XRD) and energy-dispersive X-ray (EDS) analysis indicate that the products are under a mixed Mn(IO₃)₂/MnO₂ phase. The morphology of the products can be controlled by altering the concentration, reaction time, and temperature. The growth mechanism of the nanostructures is proposed and discussed in detail. The optical properties of the 1D frog egg-like nanostructures are also examined using UV-Vis and photoluminescence (PL) spectrum.