| CeO2在Al2O3及TiO2载体上的分散 |
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| 引用本文： | 金明善,徐秀峰,翁永根,索掌怀.CeO2在Al2O3及TiO2载体上的分散[J].烟台大学学报(自然科学与工程版),2003,16(1):49-53. |
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| 作者姓名： | 金明善 徐秀峰 翁永根 索掌怀 |
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| 作者单位： | 1. 烟台大学,应用化学系,山东,烟台,264005
2. 烟台大学,应用催化研究所,山东,烟台,264005 |
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| 基金项目： | 山东省教委资助课题 (J97C5 5 ) |
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| 摘 要： | 采用等体积浸渍法制备了CeO2/Al2O3、CeO2/TiO2复合氧化物载体。应用X-射线粉末衍射（XRD）、比表面积测定、激光Raman光谱、扫描电子显微镜（SEM）等技术研究了CeO2在Al2O3及TiO2载体上的分散状态。结果显示：对CeO2/Al2O3，CeO2主要存在于Al2O3表面，晶粒小、分散性好；而对CeO2/TiO2，大部分CeO2以体相形式与TiO2共存，晶粒大、分散性也差。此外，也没有发现TiO2由锐钛矿向金红石的晶相变化。CeO2/Al2O3具有比Ce/TiO2更大的比表面积，更适合用于催化剂的载体。
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| 关 键 词： | CeO2 Al2O3 TiO2 氧化铝 二氧化钛 二氧化铈 结构表征 分散状态 复合氧化物载体 催化剂 |
| 文章编号： | 1004-8820(2003)01-0049-05 |
Dispersion of CeO2 on Al2O3 and TiO2 Supports |
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| JIN Ming shan ,XU Xiu feng ,WENG Yong gen ,SUO Zhang huai.Dispersion of CeO2 on Al2O3 and TiO2 Supports[J].Journal of Yantai University(Natural Science and Engineering edirion),2003,16(1):49-53. |
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| Authors: | JIN Ming shan XU Xiu feng WENG Yong gen SUO Zhang huai |
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| Institution: | JIN Ming shan 1,XU Xiu feng 2,WENG Yong gen 1,SUO Zhang huai 2 |
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| Abstract: | CeO 2 modified Al 2O 3 and TiO 2 supports are prepared using incipient wet impregnation method. X ray diffraction (XRD), surface areas measurement, laser Raman spectroscopy, and scanning electron microscopy (SEM) are employed to study the dispersion of CeO 2 on Al2O 3 and TiO 2. The results indicate that CeO 2 has small particles with good dispersion on Al 2O 3 surface for CeO 2/Al 2O 3. However, CeO 2 phase coexists mainly with TiO 2 phase in CeO 2/TiO 2. Phase transformation from anatase to rutile of TiO 2 is not observed for CeO 2/TiO 2 sample. CeO 2/Al 2O 3 has larger specific surface area and then is more suitable as catalysts support. |
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| Keywords: | alumina titania ceria structure characterization dispersion |
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