Abstract
Abstract The electronic state modification and the decay process of WO3 after photoabsorption were followed using picosecond X-ray absorption fine structure (XAFS) spectroscopy. The W d(eg) orbital was filled by transition from the oxygen valence state. The decay process is explained mostly by a first-order process with a rate constant k = 0.5 ± 0.1 ns−1. The UV optical length is extremely important to follow the photoreduction process using XAFS spectroscopy.
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