锰掺杂CeO_2-CoO的制备及其催化苯甲醇液相选择性氧化  

Preparation of Mn-doped CeO_2-CoO and its catalytic performance for selective oxidation of benzyl alcohol

作　　者：范国枝[1] 邹兵[1] 余承卫[1] 蔡细娇[1] 

机构地区：[1]武汉工业学院化学与环境工程学院,湖北武汉430023

出　　处：《化学试剂》2011年第5期453-456,共4页Chemical Reagents

基　　金：湖北省教育厅优秀中青年人才资助项目(Q2009-1810);武汉工业学院引进人才科研启动项目(080989)

摘　　要：以硝酸盐作前体,通过均匀共沉淀法制备了掺锰复合氧化物CeO2-MnO2-CoO,采用X-射线粉末衍射(XRD)对复合氧化物进行了表征,并研究了复合氧化物在苯甲醇液相氧化反应中的催化性能。结果表明,复合氧化物的组成、反应时间、溶剂种类和氧化剂用量等对苯甲醇转化率和苯甲醛选择性均有影响。采用叔丁基过氧化氢作氧化剂,正己烷为溶剂,回流反应8h,苯甲醇的转化率和苯甲醛选择性分别达到了88.4%和94.7%。Mn-doped CeO2-CoO mixed oxides were prepared by the co-precipitation method using nitrates as precursor,and the products were characterized by X-ray diffraction（XRD）.The catalytic performance of mixed oxides in the liquid oxidation of benzyl alcohol was studied using tert-butyl hydropero-xide as oxidant.The composition of mixed oxides,reaction time,solvent and amount of oxidant have significant effect on the conversion of benzyl alcohol and selectivity of benzaldehyde.88.4% conversion of benzyl alcohol and 94.7% selectivity of benzaldehyde were obtained with CeO2-MnO2-CoO as catalyst,n-hexane as solvent at reflux for 8 h.

关 键 词：锰掺杂复合氧化物 选择性氧化 苯甲醇 催化 

分 类 号：O643.32[理学—物理化学]