Dye-sensitized photocatalytic H2 generation has been investigated using a metal-free phenothiazine-based donor − acceptor sensitizer (PTZ-GLU) in combination with coadsorbents. The coadsorption of the PTZ-GLU dye, functionalized with a glucose end-group, in combination with a glucose-based coadsorbent, afforded improved photocatalytic activity compared to the absence of coadsorbents, to the use of a conventional (chenodeoxycholic acid) coadsorbent, or by replacing the dye glucose functionality with an alkylchain. The results suggest the strategic role of directional intermolecular dye − coadsorbent interactions on the semiconductor surface, as confirmed by first principles computational modeling, which likely suppressed detrimental recombination processes.

Dye-Sensitized Photocatalytic Hydrogen Generation: Efficiency Enhancement by Organic Photosensitizer-Coadsorbent Intermolecular Interaction

Monai, Matteo;Montini, Tiziano;Fornasiero, Paolo;
2018-01-01

Abstract

Dye-sensitized photocatalytic H2 generation has been investigated using a metal-free phenothiazine-based donor − acceptor sensitizer (PTZ-GLU) in combination with coadsorbents. The coadsorption of the PTZ-GLU dye, functionalized with a glucose end-group, in combination with a glucose-based coadsorbent, afforded improved photocatalytic activity compared to the absence of coadsorbents, to the use of a conventional (chenodeoxycholic acid) coadsorbent, or by replacing the dye glucose functionality with an alkylchain. The results suggest the strategic role of directional intermolecular dye − coadsorbent interactions on the semiconductor surface, as confirmed by first principles computational modeling, which likely suppressed detrimental recombination processes.
28-nov-2017
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https://pubs.acs.org/doi/10.1021/acsenergylett.7b00896
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11368/2917723
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