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Shape-controlled synthesis of Mn3O4 nanocrystals and their catalysis of the degradation of methylene blue

Zhang, Pengqu and Zhan, Yonggong and Cai, Bingxin and Hao, Chenchun and Wang, Jun and Liu, Chunxiao and Meng, Zhoujun and Yin, Zhoulan and Chen, Qiyuan (2010) Shape-controlled synthesis of Mn3O4 nanocrystals and their catalysis of the degradation of methylene blue. Nano Research, 3 (4). pp. 235-243.

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Abstract

Various sizes and shapes of Mn3O4 nanocrystals have been prepared in a one-pot synthesis in extremely dilute solution by soft template self-assembly. To better control size and shape, the effects of varying the growth time, reaction temperature, surfactant, and manganese source were examined. The average size of octahedral Mn3O4 crystallites was found to be related to the reaction time, while higher reaction temperature (150 °C) and the use of a cetyltrimethylammonium bromide/poly(vinylpyrrolidone) (CTAB/PVP) mixture allowed construction of a better-defined octahedral morphologies. When PVP or poly(ethylene oxide)-poly(propylene oxide) (P123) was used as template, large-scale agglomeration resulting in loss of the octahedral morphology occurred and crystallites with a quasi-spherical shape were obtained. The nano-octahedral crystallites were shown to be an efficient catalyst for the oxidation of methylene blue.

Item Type:Article
Uncontrolled Keywords:Mn3O4, octahedron, nanocrystals, self-assembly, methylene blue
Subjects:Material Science > Nanochemistry
Material Science > Nanostructured materials
ID Code:8820
Deposited By:Lesley Tobin
Deposited On:07 Apr 2010 15:59
Last Modified:07 Apr 2010 15:59

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