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

作     者：Pengqu Zhang Yonggong Zhan Bingxin Cai Chenchun Hao Jun Wang Chunxiao Liu Zhoujun Meng Zhoulan Yin Qiyuan Chen 

作者机构：College of Chemistry and Chemical EngineeringHunan UniversityChangsha 410082China College of Chemistry and Chemical EngineeringCentral South UniversityChangsha 410083China 

出 版 物：《Nano Research》 (纳米研究（英文版）)

年 卷 期：2010年第3卷第4期

页      面：235-243页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 070303[理学-有机化学] 0703[理学-化学] 

基　　金：This work was financially supported by the Chinese Ministry of Science and Technology(Project Nos.2006BAE02B05 and 2005CB221406) 

主　　题：Mn_(3)O_(4) octahedron nanocrystals self-assembly methylene blue 

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.