纺锤形介孔纳米二氧化锰的控制合成

引用本文: 韩玲, 倪纪朋, 张良苗, 岳宝华, 申杉杉, 张浩, 陆文聪. 纺锤形介孔纳米二氧化锰的控制合成[J]. 物理化学学报, 2011, 27(03): 743-748. doi: 10.3866/PKU.WHXB20110318 shu

Citation: HAN Ling, NI Ji-Peng, ZHANG Liang-Miao, YUE Bao-Hua, SHEN Shan-Shan, ZHANG Hao, LU Wen-Cong. Controlled Synthesis of Mesoporous MnO₂ Nanospindles[J]. Acta Physico-Chimica Sinica, 2011, 27(03): 743-748. doi: 10.3866/PKU.WHXB20110318 shu

纺锤形介孔纳米二氧化锰的控制合成

基金项目:
上海市纳米技术项目(0852nm00700) (0852nm00700)

上海大学创新项目(A.10-0101-09-023)资助 (A.10-0101-09-023)

摘要:

在KMnO₄和葡萄糖水溶液体系中, 用一步水热法控制合成了介孔MnCO₃纳米纺锤体, 通过焙烧MnCO₃前驱体可以得到介孔纳米MnO₂, 且保持了原有的纺锤体形貌. 用X射线衍射(XRD)、傅里叶变换红外(FTIR)光谱、扫描电镜(SEM)、透射电镜(TEM)和N₂吸附-脱附(BET)对制备的样品进行了形貌和结构的表征. 并对反应时间、反应物浓度等对产物形貌的影响进行了研究. 实验结果表明, 反应时间和葡萄糖的浓度对MnCO₃前驱体的尺寸和形貌具有重要影响, MnCO₃纵横比可从1.35:1到2.89:1之间改变. 并初步探讨了介孔MnO₂纺锤体的生长机制, MnO₂ 孔的形成是由于焙烧葡萄糖降解形成的纳米碳颗粒所致.

关键词:

水热法
/ 纺锤形
/ MnO₂
/ 介孔

English

Controlled Synthesis of Mesoporous MnO₂ Nanospindles

1.
Department of Chemistry, Shanghai University, Shanghai 200444, P. R. China
Received Date: 27 September 2010
Available Online: 03 March 2011
Fund Project:
上海市纳米技术项目(0852nm00700)

上海大学创新项目(A.10-0101-09-023)资助

Abstract:

We synthesized mesoporous MnO₂ nanospindles by a one-step hydrothermal process in an aqueous solution of KMnO₄ and glucose. The structure, morphology, purity, and size of the products were characterized by X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, transmission electron microscopy (TEM), high resolution transmission electron microscopy (HRTEM), scanning electron microscopy (SEM), and nitrogen adsorption/desorption (BET) measurements. The reaction time and concentrations of glucose influenced the final structures and shapes of the MnO₂ nanospindles. The length to diameter ratio of the MnCO₃ precursor nanospindles can be easily tuned from 1.35:1 to 2.89:1. A possible formation mechanism for the mesoporous MnO₂ nanospindles is proposed and discussed.

Key words:

Hydrothermal method
/ Spindle
/ MnO₂
/ Mesoporous

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沈阳化工大学材料科学与工程学院沈阳 110142

纺锤形介孔纳米二氧化锰的控制合成

English

Controlled Synthesis of Mesoporous MnO₂ Nanospindles

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