| 纳米结构MnO2的水热合成、晶型及形貌演化 |
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| 引用本文： | 李英品,周晓荃,周慧静,沈铸睿,陈铁红.纳米结构MnO2的水热合成、晶型及形貌演化[J].高等学校化学学报,2007,28(7):1223-1226. |
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| 作者姓名： | 李英品 周晓荃 周慧静 沈铸睿 陈铁红 |
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| 作者单位： | 南开大学化学学院,材料化学系,天津,300071 |
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| 摘 要： | 以水热合成方法制备了具有不同微观形貌的纳米结构MnO2, 并以X射线衍射(XRD), 扫描电镜(SEM)和X射线光电子能谱(XPS)等方法对其进行了表征. 跟踪考察了二氧化锰的晶型及微观形貌随水热反应时间的演变过程, 在Ostwald ripening机理作用下, MnO2晶型转化过程为γ-MnO2, α-MnO2和β-MnO2, 同时形貌由微米球转变为海胆结构、空心海胆结构和纳米线.
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| 关 键 词： | 二氧化锰 水热合成 晶型 核壳结构 纳米线 |
| 文章编号： | 0251-0790（2007）07-1223-04 |
| 收稿时间： | 2007-01-22 |
| 修稿时间： | 2007-01-22 |
Hydrothermal Preparation of Nanostructured MnO2 and Morphological and Crystalline Evolution |
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| LI Ying-Pin,ZHOU Xiao-Quan,ZHOU Hui-Jing,SHEN Zhu-Rui,CHEN Tie-Hong.Hydrothermal Preparation of Nanostructured MnO2 and Morphological and Crystalline Evolution[J].Chemical Research In Chinese Universities,2007,28(7):1223-1226. |
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| Authors: | LI Ying-Pin ZHOU Xiao-Quan ZHOU Hui-Jing SHEN Zhu-Rui CHEN Tie-Hong |
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| Institution: | Department of Materials Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China |
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| Abstract: | Manganese dioxides with various morphologies were prepared with a common hydrothermal method without any templates or additives. The morphological evolution was accompanied with the conversion of the polymorphic forms, gradually from γ-type to β-type. Meanwhile, MnO2 microspheres, urchinlike nanostructures and nanowires were successfully synthesized. The products were characterized via X-ray powder diffraction, X-ray photoelectron spectroscopy, scanning electron microscope and transmission electron microscope. The process can be explained with Ostwald-Ripening mechanism. |
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| Keywords: | MnO_2 Hydrothermal preparation Crystal type Core-shell structure Nanowires |
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