负载型ZnO/SiO_2及ZnO-SiO_2溶胶凝胶催化剂的表面结构研究  

Investigation of Surface Structures of Supported ZnO/SiO_2 and ZnO-SiO_2 Sol-gel Catalysts

作　　者：刘庆生[1] 王振旅[1] 于剑锋[1] 杨飘萍 王国甲[1] 杨洪茂[1] 郑大方[2] 吴通好[1] 

机构地区：[1]吉林大学化学系催化研究室,长春130023 [2]吉林大学分析测试中心,长春130023

出　　处：《高等学校化学学报》2001年第12期2091-2093,共3页Chemical Journal of Chinese Universities

摘　　要：ZnO/SiO\-2 and ZnO\|SiO\-2 catalysts were prepared by the impregnation and sol\|gel method, respectively. The characterization of the catalysts by XPS and FTIR indicated that much "free" zinc oxide and unreacted Si\_OH existed on the surface of ZnO/SiO\-2 sample. As for ZnO\|SiO\-2 sol\|gel catalyst, the corresponding phenomena were not observed. The prepared samples were also used as the catalysts for decomposition of 2\|butanol. A high selectivity for dehydrogenation was observed over the supported catalyst. However, a high selectivity for dehydration was shown over the ZnO\|SiO\-2 sol\|gel catalyst. The opposite selectivity for dehydration or dehydrogenation observed over the two kinds of catalysts may be just because of the different surface structures of the catalysts.ZnO/SiO\-2 and ZnO\|SiO\-2 catalysts were prepared by the impregnation and sol\|gel method, respectively. The characterization of the catalysts by XPS and FTIR indicated that much 'free' zinc oxide and unreacted Si\_OH existed on the surface of ZnO/SiO\-2 sample. As for ZnO\|SiO\-2 sol\|gel catalyst, the corresponding phenomena were not observed. The prepared samples were also used as the catalysts for decomposition of 2\|butanol. A high selectivity for dehydrogenation was observed over the supported catalyst. However, a high selectivity for dehydration was shown over the ZnO\|SiO\-2 sol\|gel catalyst. The opposite selectivity for dehydration or dehydrogenation observed over the two kinds of catalysts may be just because of the different surface structures of the catalysts.

关 键 词：FTIR XPS 丁醇-2 分解 ZNO SiO2 溶胶凝胶催化制 表面结构 负载型催化剂 二氧化硅 二氧化锡 催化活性 氧化锌 

分 类 号：O643.36[理学—物理化学] O623.411[理学—化学]