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Highly-efficient solar steam generation of supported metal-organic framework membranes by a photo-induced electron transfer process

Abstract

Porphyrin-based molecules possess excellent photo-physical properties, and are widely applied to solar-to-energy-related research fields. Nonetheless, these molecules featuring small cross section of optical absorption and high radiative recombination rate give rise to inferior performance for photothermal conversion. Herein, porphyrin paddle-wheel frameworks-3 (PPF-3) comprised of tetrakis (4-carboxyphenyl) porphyrin (TCPP) and Co2+ was utilized to study the possibility for the enhanced photothermal effect induced by a photo-induced electron transfer (PET) process. Finally, a supported PPF-3 membrane exhibited comparable solar steam generation performance to a supported membrane of Au nanoparticles. Solar thermal receiver efficiency of the supported PPF-3 membrane was increased to 70.3% that was ~420% higher than that of the supported TCPP membrane. The enhanced performance is beneficial from PPF-3 structure and component that enable to broaden optical absorption range and suppress radiative recombination of excitons by PET from the lowest unoccupied molecular orbital (LUMO) of TCPP to cobalt ions. Based on the ubiquitous structures in metal-organic frameworks (MOFs), the research opens a new avenue for MOFs’ applications as cost-efficient and eligible photothermal materials.

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Publication details

The article was received on 10 Nov 2018, accepted on 15 Apr 2019 and first published on 15 Apr 2019


Article type: Paper
DOI: 10.1039/C8NR09080G
Citation: Nanoscale, 2019, Accepted Manuscript

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    Highly-efficient solar steam generation of supported metal-organic framework membranes by a photo-induced electron transfer process

    L. Chen, D. Li, Y. Wang and C. Duan, Nanoscale, 2019, Accepted Manuscript , DOI: 10.1039/C8NR09080G

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