Black TiOx photocatalyst obtained by laser irradiation in water

M. Zimbone (1) , G. Cacciato (1) , R. Sanz (1) , Robert Carles (2) , A. Gulino (3) , V. Privitera (1) , M.G. Grimaldi (1)

1 IMM-CNR - Laboratorio MDM
2 CEMES-NeO - Nano-Optique et Nanomatériaux pour l'optique
3 Unict - Università degli studi di Catania = University of Catania

In this work, we present the synthesis of a nanostructured TiOx film on a Ti foil by using a scalable and environmental friendly methodology such as the laser irradiation in liquid. The obtained black-TiOx film is composed by amorphous titanates and shows a high absorption in both visible and UV range. The introduction of a thin layer of Pt nanoparticles (PtNps) on the rear side of the Ti foil, gave rise to a stacked layered structure (TiOx/Ti/PtNps) that boosted the quantum photocatalytical efficiency, according to ISO 10678:2010. Such enhancement is discussed in terms of hole trapping by surface states and electron scavenging by the Pt Nps.

Mots clés: Amorphous films; Photocatalysis; Platinum; Environmental-friendly; Hole trapping; Irradiation in liquids; Layered Structures; Nanostructured TiO; Pt nanoparticles; Thin layers; Titania; Irradiation

Domaines: Physique [physics]

M. Zimbone, G. Cacciato, R. Sanz, Robert Carles, A. Gulino, et al.. Black TiOx photocatalyst obtained by laser irradiation in water. Catalysis Communications, 2016, 84, pp.11-15. ⟨10.1016/j.catcom.2016.05.024⟩. ⟨hal-01763597⟩