Characterization of Ga-substituted zeolite Beta by X-ray absorption spectroscopy
Characterization of Ga-substituted zeolite Beta by X-ray absorption spectroscopy
复制标题
X 射线吸收光谱表征 Ga 取代沸石 Beta
DOI：
10.1039/b001643h
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发表时间：
2000
影响因子：
--
通讯作者：
J. Pérez
中科院分区：
文献类型：
--
作者：
C. Prieto;T. Blasco;M. A. Camblor;J. Pérez
X射线吸收光谱表明Ga进入了β沸石的骨架。扩展X射线吸收精细结构（EXAFS）和X射线吸收近边结构（XANES）数据的分析揭示了Ga在β沸石中的原子环境。这两种技术提供的证据表明，合成的沸石的煅烧和脱水引起Ga原子环境的变化，这可以理解为由于Ga从骨架位点迁移到骨架外位置。XANES结果允许计算两个位置处的原子分数。
The incorporation of Ga into the framework of zeolite Beta has been evidenced by X-ray absorption spectroscopy. Analysis of extended X-ray absorption fine structure (EXAFS) and X-ray absorption near edge structure (XANES) data reveals the atomic environment of Ga in zeolite Beta. Both techniques provide evidence that calcination and dehydration of the synthesized zeolites provokes changes in the Ga atomic environment, which can be understood as due to the migration of Ga from framework sites to extra-framework positions. The XANES results allow calculation of the atomic fraction at both positions.