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Opposite effect of the Cu photodeposition on the ∙OH generation and diclofenac degradation depends on the exposed anatase facet
Abstrakt
Exposition of a specific crystal facets and modification with co-catalysts are often used in order to improve photocatalytic activity of a material. However, considering complexity of these interactions, it is still challenging to fully understand and predict activity of a specific system. Here, we report combination of the {0 0 1} and {1 0 1} crystal facets of anatase TiO2 with CuXO co-catalyst, applied for diclofenac degradation, ∙OH generation and 4-nitrophenol reduction. Interestingly, we observed opposite effect of Cu for ∙OH generation and DCF degradation, with clear enhancement of the activity observed only for the {0 0 1} facets. EPR measurements further proved that for the most active material in this series, Cu exist as an atomically-scattered Cu2+ species at the surface, achieved as the result of high surface development and high adsorption energy (from DFT). Based on the absorbance measurements and XPS analysis, these species are shown to be further reduced to Cu2O during degradation process. Compared to this, all other systems ({1 0 1} and all results for nitrophenol) showed reduction of the activity due to the CuXO presence. In this regard, CuXO cannot be seen as an universal reduction co-catalyst for TiO2, with final effect being clearly dependent on exposed facet and reaction. This is despite TiO2/CuXO was found to form analogical, well-known Z-scheme junction in case of both surfaces. Ultimately, we showed that specifically {0 0 1} with CuXO make highly synergistic combination for ROS generation.
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Autorzy (8)
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Adam Ostrowski
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Aleksandra Szkudlarek dr inż.
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Mateusz Marzec
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Krystian Sokołowski
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Karol Sikora dr
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Pełna treść
- Wersja publikacji
- Accepted albo Published Version
- DOI:
- Cyfrowy identyfikator dokumentu elektronicznego (otwiera się w nowej karcie) 10.1016/j.cej.2024.159146
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Informacje szczegółowe
- Kategoria:
- Publikacja w czasopiśmie
- Typ:
- artykuły w czasopismach
- Opublikowano w:
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CHEMICAL ENGINEERING JOURNAL
nr 505,
ISSN: 1385-8947 - Język:
- angielski
- Rok wydania:
- 2025
- Opis bibliograficzny:
- Dudziak S., Smoliński J., Ostrowski A., Szkudlarek A., Marzec M., Sokołowski K., Sikora K., Zielińska-Jurek A.: Opposite effect of the Cu photodeposition on the ∙OH generation and diclofenac degradation depends on the exposed anatase facet// CHEMICAL ENGINEERING JOURNAL -Vol. 505, (2025), s.159146-
- DOI:
- Cyfrowy identyfikator dokumentu elektronicznego (otwiera się w nowej karcie) 10.1016/j.cej.2024.159146
- Źródła finansowania:
- Weryfikacja:
- Politechnika Gdańska
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