The XAFS phase isolation and characterization of dispersion phase structure

According to Lu Kunquan's XAFS formula for mixing phase system, it is impossible to get the true structure of this kind of system by usual data analysis. A method which combines Lu Kunquan's XAFS formula with XRD was proposed to isolate XAFS of crystalline and dispersed phases. NiO/γ-Al₂O₃ system is prepared by mixing NiO and completely dispersed NiO/γ-Al₂O₃ and dealt by this method. The obtained coordination parameters of dispersed phase is just as same as the actual value. It demonstrates that the method of the phase isolation is reasonable and practicable.