Abstract
The Pt modified ultrafine WO3 (Pt/WO3) nanofibers with average diameter of 70 nm, showing excellent photoelectrochemical properties have been successfully prepared via a simple two-step technique. Pt/WO3 nanofibers with various Pt contents exhibit the excellent photocatalytic activity for Rhodamine B (RhB), better than pure WO3 nanofibers, which can be ascribed to the synergistic effect arising between Pt and WO3. Simultaneously, these highly composition-dependent with Pt/WO3 nanofibers shows the optimized photodegradation efficiency. 1%-Pt/WO3 nanofibers provide the enhanced photodegradation efficiency (93.7%) under the visible-light irradiation for 140 min. Based on the density functional theory, the first-principle calculations are performed to further explore the synergistic effect, electronic structure and photocatalytic mechanism of the as-prepared photocatalysts. This design opens up further opportunities for improving photocatalysts and understanding for the optimization of photocatalytic activity of these unique materials.
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