| 负载型ZnO/SiO2及ZnO-SiO2溶胶凝胶催化剂的表面结构研究 |
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| 引用本文： | 刘庆生,王振旅,于剑锋,杨飘萍,王国甲,杨洪茂,郑大方,吴通好.负载型ZnO/SiO2及ZnO-SiO2溶胶凝胶催化剂的表面结构研究[J].高等学校化学学报,2001,22(12):2091-2093. |
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| 作者姓名： | 刘庆生 王振旅 于剑锋 杨飘萍 王国甲 杨洪茂 郑大方 吴通好 |
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| 作者单位： | 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 |
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| 摘 要： | 催化剂的表面结构不仅影响催化剂的催化活性, 而且还影响反应产物的选择性1]. 制备催化剂的方法不同, 其表面结构及表面性质也不同2~4]. 浸渍法简单实用, 有利于得到高分散、晶粒细小的高比表面催化剂, 而溶胶-凝胶法则由于其制备温度较低, 易于形成无定形的或介态的氧化物相5]而可达到分子级的混合, 其活性组分能有效地嵌入网状结构中, 不易受外界的影响而聚集或长大, 因此对催化剂的稳定性更为有利6,7].
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| 关 键 词： | FTIR XPS 丁醇-2分解 ZnO/SiO2 ZnO-SiO2溶胶凝胶催化剂 表面结构 |
| 文章编号： | 0251-0790(2001)12-2091-03 |
| 收稿时间： | 2000-07-03 |
Investigation of Surface Structures of Supported ZnO/SiO2 and ZnO-SiO2 Sol-gel Catalysts |
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| LIU QingSheng,WANG ZhenLü,YU JianFeng,YANG PiaoPing,WANG GuoJia,YANG HongMao,ZHENG DaFang,WU TongHao.Investigation of Surface Structures of Supported ZnO/SiO2 and ZnO-SiO2 Sol-gel Catalysts[J].Chemical Research In Chinese Universities,2001,22(12):2091-2093. |
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| Authors: | LIU QingSheng WANG ZhenLü YU JianFeng YANG PiaoPing WANG GuoJia YANG HongMao ZHENG DaFang WU TongHao |
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| Institution: | 1. Departmentof Chemistry, Jilin University, Changchun 130023, China;
2. Analysis Test&Exp eriment Center, Jilin University, Changchun 130023, China |
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| Abstract: | 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. |
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| Keywords: | FTIR XPS Decomposition of 2\|butanol ZnO/SiO\-2 ZnO\|SiO\-2 sol\|gel catalysts Surface structure |
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