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Wantana Klysubun Pinit Kidkhunthod Pongjakr Tarawarakarn Panidtha Sombunchoo Chanapa Kongmark Sukit Limpijumnong Saroj Rujirawat Rattikorn Yimnirun Gamolwan Tumcharern Kajornsak Faungnawakij 《Journal of synchrotron radiation》2017,24(3):707-716
The SUT‐NANOTEC‐SLRI beamline was constructed in 2012 as the flagship of the SUT‐NANOTEC‐SLRI Joint Research Facility for Synchrotron Utilization, co‐established by Suranaree University of Technology (SUT), National Nanotechnology Center (NANOTEC) and Synchrotron Light Research Institute (SLRI). It is an intermediate‐energy X‐ray absorption spectroscopy (XAS) beamline at SLRI. The beamline delivers an unfocused monochromatic X‐ray beam of tunable photon energy (1.25–10 keV). The maximum normal incident beam size is 13 mm (width) × 1 mm (height) with a photon flux of 3 × 108 to 2 × 1010 photons s?1 (100 mA)?1 varying across photon energies. Details of the beamline and XAS instrumentation are described. To demonstrate the beamline performance, K‐edge XANES spectra of MgO, Al2O3, S8, FeS, FeSO4, Cu, Cu2O and CuO, and EXAFS spectra of Cu and CuO are presented. 相似文献
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Sylvie Daviero-Minaud Chanapa Kongmark Rose-Noëlle Vannier 《Journal of solid state chemistry》2009,182(2):289-294
The actual oxygen environment of the tungsten dopant in the Ba2In2−xWxO5+3x/2 solid solution was revealed by combining X-ray absorption spectroscopy at the tungsten LI and LIII edges and at the indium LI edge. Whatever the substitution ratio, the tungsten atoms exhibit a regular octahedral environment. When the substitution ratio increases, the oxygen vacancies are progressively filled until their total occupancy for x=2/3. For x?0.3, the perovskite structure is stabilised; the tungsten atoms are randomly distributed in the structure. Although X-ray diffraction revealed a cubic symmetry for these compositions, a local distortion of the indium environment is observed when a tungsten atom is in its surrounding. 相似文献
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