UV-Visible photo-reactivity of permanently polarized inorganic nanotubes coupled to gold nanoparticles.

Autor: Patra S; Université Paris-Saclay, CEA, CNRS, NIMBE, 91191, Gif-sur-Yvette, France. spatra@barc.gov.in.; Radiochemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai - 400085, India., Testard F; Université Paris-Saclay, CEA, CNRS, NIMBE, 91191, Gif-sur-Yvette, France. spatra@barc.gov.in., Gobeaux F; Université Paris-Saclay, CEA, CNRS, NIMBE, 91191, Gif-sur-Yvette, France. spatra@barc.gov.in., Sicard L; Université de Paris, ITODYS, CNRS, UMR 7086, 15 rue J.-A. de Baïf, F-75013, Paris, France., Shaming D; Université de Paris, ITODYS, CNRS, UMR 7086, 15 rue J.-A. de Baïf, F-75013, Paris, France., Caër SL; Université Paris-Saclay, CEA, CNRS, NIMBE, 91191, Gif-sur-Yvette, France. spatra@barc.gov.in., Thill A; Université Paris-Saclay, CEA, CNRS, NIMBE, 91191, Gif-sur-Yvette, France. spatra@barc.gov.in.
Jazyk: angličtina
Zdroj: Nanoscale [Nanoscale] 2023 Feb 23; Vol. 15 (8), pp. 4101-4113. Date of Electronic Publication: 2023 Feb 23.
DOI: 10.1039/d2nr05796d
Abstrakt: Hybrid aluminosilicate nanotubes (Imo-CH 3 ) have the ability to trap small organic molecules inside their hydrophobic internal cavity while being dispersed in water owing to their hydrophilic external surface. They also display a curvature-induced polarization of their wall, which favors reduction outside the nanotubes and oxidation inside. Here, we coupled bare plasmonic gold nanoparticles (GNPs) with Imo-CH 3 and analyzed for the first time the redox reactivity of these hybrid nano-reactors upon UV illumination. We show that the coupling between GNPs and Imo-CH 3 significantly enhances the nanotube photocatalytic activity, with a large part of water reduction occurring directly on the gold surface. The coupling mechanism strongly influences the initial H 2 production rate, which can go from ×10 to more than ×90 as compared to bare Imo-CH 3 depending on the synthesis route of the GNPs. The present results show that this hybrid photocatalytic nano-reactor benefits from a synergy of polarization and confinement effects that facilitate efficient H 2 production.
Databáze: MEDLINE
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