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A novel (Ti/Ce)UiO-X MOFs@TiO2 heterojunction for enhanced photocatalytic performance: Boosting via Ce4+/Ce3+ and Ti4+/Ti3+ redox mediators
Abstract
Titanium-substituted cerium-oxo-based UiO MOFs with terephthalate linkers modified by various groups (–Br, –NH2, –NO2) or their derivatives (N-heterocyclic or biphenyl groups) were combined with titanium dioxide in a multistep route to obtain a core-shell-like architecture. DFT simulations showed that Ce- and bimetallic Ti/Ce- MOFs exhibited different charge compensation. Extended characterization revealed the formation of heterojunctions between the (Ti/Ce)UiO-X MOFs and TiO2 nanoflowers, suitable band edge positions, and high specific surface area and porosity, which resulted in effective electron transfer and excellent photocatalytic activity. The photoactivity of the (Ti/Ce)UiO-X@TiO2 composites for hydrogen production or phenol degradation varied according to the order –NH2 > biphenyl > –N– > –H > –Br > –NO2 > pristine TiO2 or –Br > –NH2 > –NO2 > –N– > –H > biphenyl > pristine TiO2. The photocatalytic hydrogen production rate of (Ti/Ce)UiO-66-NH2@TiO2 was 4724 and 19.3 μmol⋅gcat–1 after 4 h of UV–Vis and visible light irradiation, which were 79 and 19 times higher than that of pristine rutile, respectively.
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Authors (5)
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Patrycja Parnicka
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Wojciech Lisowski dr hab.
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Alicja Mikolajczyk
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Adriana Zaleska-Medynska prof. dr hab.
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Keywords
Details
- Category:
- Articles
- Type:
- artykuły w czasopismach
- Published in:
-
APPLIED CATALYSIS B-ENVIRONMENTAL
no. 310,
ISSN: 0926-3373 - Language:
- English
- Publication year:
- 2022
- Bibliographic description:
- Parnicka P., Lisowski W., Klimczuk T., Mikolajczyk A., Zaleska-Medynska A.: A novel (Ti/Ce)UiO-X MOFs@TiO2 heterojunction for enhanced photocatalytic performance: Boosting via Ce4+/Ce3+ and Ti4+/Ti3+ redox mediators// APPLIED CATALYSIS B-ENVIRONMENTAL -Vol. 310, (2022), s.121349-
- DOI:
- Digital Object Identifier (open in new tab) 10.1016/j.apcatb.2022.121349
- Sources of funding:
-
- COST_FREE
- Verified by:
- Gdańsk University of Technology
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