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.
Authors
- Patrycja Parnicka,
- dr hab. Wojciech Lisowski,
- prof. dr hab. inż. Tomasz Klimczuk link open in new tab ,
- Alicja Mikolajczyk,
- prof. dr hab. Adriana Zaleska-Medynska
Additional information
- DOI
- Digital Object Identifier link open in new tab 10.1016/j.apcatb.2022.121349
- Category
- Publikacja w czasopiśmie
- Type
- artykuły w czasopismach
- Language
- angielski
- Publication year
- 2022
