Shape-Controlled Synthesis of Mn_(3)O_(4) Nanocrystals and Their Catalysis of the Degradation of Methylene Blue

查看全文 作　　者：Pengqu [1]Zhang;Yonggong [1,2]Zhan;Bingxin [1]Cai;Chenchun [1]Hao;Jun [1]Wang;Chunxiao [1]Liu;Zhoujun [1]Meng;Zhoulan [2]Yin;Qiyuan [2]Chen

机构地区：[1]College of Chemistry and Chemical Engineering,Hunan University,Changsha 410082,China;[2]College of Chemistry and Chemical Engineering,Central South University,Changsha 410083,China

出　　处：《Nano Research》索引2010年第3卷第4期,共9页

基　　金：This work was financially supported by the Chinese Ministry of Science and Technology(Project Nos.2006BAE02B05 and 2005CB221406). 摘　　要：Various sizes and shapes of Mn_(3)O_(4) 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 Mn_(3)O_(4) 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. 关键词：Mn_(3)O_(4) OCTAHEDRON NANOCRYSTALS SELF-ASSEMBLY methylene blue

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Shape-Controlled Synthesis of Mn_(3)O_(4) Nanocrystals and Their Catalysis of the Degradation of Methylene Blue

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