不同形貌Mn_2O_3的制备及其催化氧化氯苯性能的研究  

Preparation of Mn_2O_3 with different morphologies and their catalytic performance for chlorobenzene

作　　者：宋灿[1] 易全瑞[1] 李经纬[1] 刘善堂[1] 

机构地区：[1]武汉工程大学绿色化工过程教育部重点实验室,武汉430074

出　　处：《功能材料》2014年第13期13050-13055,共6页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(20873097;21071113);湖北省科技厅国际合作资助项目(2011CDA049;2012IHA002);湖北省教育厅资助项目(T201306)

摘　　要：采用牺牲模板法和水热法制备了3种形貌Mn2O3(核壳球、空心立方体、纳米棒),使用X射线衍射(XRD)、扫描电镜(SEM)和透射电镜(TEM)对其进行表征,结果表明,不同形貌Mn2O3具有相同的晶体结构。在此基础上,研究了这3种Mn2O3对氯苯的催化活性。活性测试结果表明,不同形貌Mn2O3对氯苯的催化性能有显著差异,其活性顺序为空心立方体>核壳球>纳米棒。H2-TPR和BET结果表明,不同形貌Mn2O3中氧物种的流动性及催化剂比表面积的相对大小是决定其催化性能的重要因素。The Mn2 O3 catalysts with typical morphologies,such as core-shell spheres,hollow cubes and one-di-mensional nanorods were synthesized by sacrificial template and hydrothermal methods,and their catalytic properties for oxidation of chlorobenzene （CB）were tested.The samples were characterized by X-ray diffraction （XRD）,scanning electron microscopy （SEM）,transmission electron microscopy （TEM）and so on.The XRD result indicated that all samples had the same crystal structure.The catalytic activity tests showed that the per-formance for CB oxidation depended on the morphology of Mn2 O3 ,following in the order of hollow cubes ＆gt;core-shell spheres＆gt; nanorods.The H2-TPR and N2 adsorption-desorption results demonstrated that the mobili-ty of oxygen and specific surface area of the catalysts were considered as the dominant factors for low tempera-ture catalytic destruction of CB.

关 键 词：MN2O3 形貌 氯苯 催化燃烧 

分 类 号：O643.36[理学—物理化学] TQ426.6[理学—化学]