关键词: 丝光沸石, 铁, Ｘ射线衍射分析, 付里叶变换, 红外分光光度法

The Fe-substituted mordenite was hydrothemally synthesized and characterized by XRD, FT-IR, TPR and XAFS. The FT-IR spectra and powder X-ray diffraction patterns showed that the as-synthesized samples were well crystalline mordenite and the incorporation of Fe into the framework of zeolite was verified. The local structure of Fe in the framework was characterized by XAFS. The pre-edge peaks appeared in the XANES spectra of (Si, Fe)-MOR suggested the tetrahedral structure of Fe, and confirmed the incorporation of Fe into the framework of zeolites. the results calculated from the XAFS indicated that the Fe had a tetrahedral structure with an Fe－O distance of 0.188～0.189nm, which accorded well with the stable structure of as-synthesized zeolites. The peaks at 0.320nm and 0. 338nm were assigned to the coordinated Si atoms in the framework.

Key words: MORDENITE, IRON, X-RAY DIFFRACTION ANALYSIS, FOURIER TRANSFORM, INFRARED SPECTROPHOTOMETRY