Interface Engineering of Fe-Loaded ZnO Nanostructures via Wet Impregnation and Hydrothermal Routes for Enhanced CO Selectivity in CO2 Photoreduction
This study reports the synthesis of iron-doped zinc oxide nanocomposites (ZnO-FeOx) via two distinct methods, hydrothermal (HT) and wet impregnation (WI), for photocatalytic CO2 reduction under both visible light (VLI) and ultraviolet irradiation (UVI) light irradiation. The (HT) approach yielded a...
Elmentve itt :
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| Dokumentumtípus: | Cikk |
| Megjelent: |
2026
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| Sorozat: | CHEMSUSCHEM
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| Tárgyszavak: | |
| doi: | 10.1002/cssc.202502004 |
| mtmt: | 36489544 |
| Online Access: | http://publicatio.bibl.u-szeged.hu/38682 |
| Tartalmi kivonat: | This study reports the synthesis of iron-doped zinc oxide nanocomposites (ZnO-FeOx) via two distinct methods, hydrothermal (HT) and wet impregnation (WI), for photocatalytic CO2 reduction under both visible light (VLI) and ultraviolet irradiation (UVI) light irradiation. The (HT) approach yielded a doped solid solution, whereas the (WI) method produced a heterosystem with well-defined interfaces. The ZnO-FeOx heterosystem demonstrated exceptional performance, achieving 99.99% selectivity for CO production with yields of 0.15 µmol g-1 min-1 (UVI) and 0.03 µmol g-1 min-1 (VLI). In comparison, the hydrothermally synthesized catalyst produced CO at yields of 0.042 µmol g-1 min-1 (UVI) and 0.006 µmol g-1 min-1 (VLI) with 94% selectivity. These results correspond to an approximately sevenfold enhancement for the WI-synthesized catalyst and a twofold improvement for the (HT) synthesized material relative to pristine ZnO. Combined surface analysis and DFT calculations showed that iron incorporation generates interfacial impurity states that facilitate a unique charge-transfer pathway, enhancing CO2 photoreduction. DRIFTS confirmed formate and carbonyl species as key intermediates in the reaction mechanism. |
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| Terjedelem/Fizikai jellemzők: | 13 |
| ISSN: | 1864-5631 |