Analysis of coordination environment of aluminum species in zeolites and amorphous silica-alumina by X-ray absorption and emission spectroscopy

作者：Yamamoto Takashi; Kudo Tomoyuki; Yamamoto Tomohiro; Kawai Jun

来源：Microporous and Mesoporous Materials, 2013, 182: 239-243.

DOI：10.1016/j.micromeso.2013.03.047

• Al K-edge XANES
• Al K alpha spectra
• Extended X-ray emission fine structure (EXEFS)
• Coordination number
• Alumina-based oxides

The coordination numbers of Al species in zeolites and amorphous silica alumina samples were investigated with three kinds of X-ray spectroscopic technique: namely, X-ray absorption near edge structure (XANES), wavelength dispersive X-ray fluorescence (WD-XRF), and extended X-ray emission fine structure (EXEFS) spectroscopies. XANES, WD-XRF and EXEFS spectra of zeolite samples were identical to those of four-coordinated reference compounds and were distinguishable from those for six-coordinated samples. The energy shift obtained by}CANES spectroscopy showed good correlation with those evaluated by WD-XRF and EXEFS.

• 出版日期2013-12