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Visible-light-driven lanthanide-organic-frameworks modified TiO2 photocatalysts utilizing up-conversion effect
Abstract
Highly efficient and quite stable composite with core-shell-like architecture reported herein, responds to the challenge of sunlight-driven photocatalysts. The Ln(ndc)/TiO2 photocatalytic system comprises active lanthanide-carboxylate coordination networks (Nd, Er, Ho, and Tm as metal ions, and 2,6-naphthalene dicar-boxylic acid as the organic linker) and inert titanium dioxide and allow to convert incompatible visible radiation into functional ultraviolet photons. The combination of the antenna-reactor photocatalyst complex with Ln(ndc) shell layers promotes light harvesting and efficient mass transfer, resulting in additional photoexcited electrons. The Nd(ndc) metal-organic framework successfully activate TiO2 via up-conversion energy transfer. The apparent quantum efficiency, determined at wavelengths corresponding to the transitions from the Nd3+ground state, equals to 2.8% and 3.2% for 525 and 583 nm, respectively. Integration of the Nd(ndc) MOF and TiO2 results in the highest efficiency of phenol degradation, affording a value of 87.5% after 60 min of visible light (λ >420 nm) exposure.
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Authors (6)
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Patrycja Parnicka
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Wojciech Lisowski dr hab.
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Andrzej Żak
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Adriana Zaleska-Medynska Prof. dr hab. inż.
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- Category:
- Articles
- Type:
- artykuły w czasopismach
- Published in:
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APPLIED CATALYSIS B-ENVIRONMENTAL
no. 291,
ISSN: 0926-3373 - Language:
- English
- Publication year:
- 2021
- Bibliographic description:
- Parnicka P., Lisowski W., Klimczuk T., Łuczak J., Żak A., Zaleska-Medynska A.: Visible-light-driven lanthanide-organic-frameworks modified TiO2 photocatalysts utilizing up-conversion effect// APPLIED CATALYSIS B-ENVIRONMENTAL -Vol. 291, (2021), s.120056-
- DOI:
- Digital Object Identifier (open in new tab) 10.1016/j.apcatb.2021.120056
- Verified by:
- Gdańsk University of Technology
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