| 利用Eu3+荧光特性研究CaO-La2O3催化剂结构 |
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| 引用本文： | 纪敏,毕颖丽,甄开吉,徐立羽华,魏诠.利用Eu3+荧光特性研究CaO-La2O3催化剂结构[J].物理化学学报,1995,11(2):175-179. |
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| 作者姓名： | 纪敏 毕颖丽 甄开吉 徐立羽华 魏诠 |
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| 作者单位： | Department of Chemistry,Jilin University,Changchun 130023,The Chentre of Analysis and Testing,Jilin University,Changchun 130023 |
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| 摘 要： | 近年来，利用稀土窝子荧光特性作为探针研究无机、有机、生物大分子结构，日益引起人们的注意．因为稀土荧光特征可以灵敏地反映发光离子近部环境的对称性、所处格位及不同对称性的格位数、有无反演中。心等结构信息1]．由于Eu3＋离子基态能级7F0和主要的发射能级5D0的总角动量数J都为零，不被晶体场所劈裂，而且Eu3＋在不同点群对称性时，7FJ（J＝1，2，3，4，5，6）的能级劈裂数和5D0→7FJ的跃过数均有报导2]，所以，Eu3＋可用于探针分析减土金属氧化物和稀土金属氧化物都是甲烷氧化倡联较好的催化剂．前者具有较强的碱性，后者具…
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| 关 键 词： | 稀土 荧光 甲烷氧化偶联 |
| 收稿时间： | 1994-01-15 |
| 修稿时间： | 1994-04-25 |
The Study on Structures of CaO-La_2O_3 Catalysts by Fluorescence Emission of Eu~(3 ) |
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| Ji Min, Bi Yingli, Zhen Kaiji, Xu Yuhua.The Study on Structures of CaO-La_2O_3 Catalysts by Fluorescence Emission of Eu~(3 )[J].Acta Physico-Chimica Sinica,1995,11(2):175-179. |
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| Authors: | Ji Min Bi Yingli Zhen Kaiji Xu Yuhua |
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| Institution: | Department of Chemistry,Jilin University,Changchun 130023|The Chentre of Analysis and Testing,Jilin University,Changchun 130023 |
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| Abstract: | The C2 selectivity of catalyst La2O3 in okidative coupling of methane may beincreased by doping small amount of CaO. Some experimental techniques were adoptedsuch as measurement of fluorescence emission of Eu3 doped into La2O3, deterIninationsof the lattice paramters and XPS of the catalysts. The doping of CaO results in anincreace m ambient symmetry of La3 and in the concentration for creating oxygen ionvacancies in La2O3. |
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| Keywords: | Rare earth Fluorescence Oxidative coupling of methane |
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