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A triptych photocatalyst based on the Co-Integration of Ag nanoparticles and carbo-benzene dye into a TiO2 thin film

Cure, Jérémy and Cocq, Kévin and Mlayah, Adnen and Hungria, Teresa and Alphonse, Pierre and Chabal, Yves J. and Maraval, Valérie and Chauvin, Rémi and Estève, Alain and Rossi, Carole A triptych photocatalyst based on the Co-Integration of Ag nanoparticles and carbo-benzene dye into a TiO2 thin film. (2019) International Journal of Hydrogen Energy, 44 (48). 26347-26360. ISSN 0360-3199

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Official URL: https://doi.org/10.1016/j.ijhydene.2019.08.126

Abstract

This work proposes a new efficient, long-lasting scalable and low-cost triptych photocatalyst by assembling a semiconductor thin film (planar anatase TiO2), a photosensitive molecule of the carbo-benzene (Cbz) family and plasmonic Ag nanoparticles with exquisite degree of intimacy with the semiconductor. Under simulated sunlight conditions over 48 h, the triptych TiO2/Ag/Cbz photocatalyst allows a hydrogen production rate of 0.18 mmol gphotocatalyst−1 h−1 in conditions of applicative pressure (2.2 bars) and temperature (ambient) suitable for commercial applications. A ternary synergy (~33%) for hydrogen production is clearly evidenced with the triptych material in comparison with the diptych counterpart. The role of each component (TiO2, Ag and Cbz) on the H2 production is investigated systematically by discriminating the light absorption from the different materials and interfaces. We show how to achieve an efficient vertical Schottky junction between Ag nanoparticles and the TiO2 substrate that is demonstrated to be of crucial importance in the water-splitting process.

Item Type:Article
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Université de Toulouse > Institut National des Sciences Appliquées de Toulouse - INSA (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Other partners > University of Texas at Dallas (USA)
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Deposited On:02 Apr 2021 08:24

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