Photocatalytic activity in the in-flow degradation of NO on porous TiO2 –coated glasses from hybrid inorganic–organic thin films prepared by a combined ALD/MLD deposition strategy

Azpiroz, R. ; Borraz, M. ; González, A. ; Mansilla, C. ; Iglesias, M. ; Pérez Torrente, J. J. (Universidad de Zaragoza)

Resumen: A combined ALD/MLD (where ALD and MLD stand for atomic and molecular layer deposition, respectively) deposition strategy using TiCl4, H2 O and HQ (hydroquinone) as precursors has been applied for the preparation of inorganic–organic thin films on soda-lime glasses. The alternate deposition of TiO2 layers, by pulsing TiCl4 /H2 O (ALD), and hybrid layers, using TiCl4 /HQ (MLD), results in the formation of thin films that are precursors for porous TiO2-coatings after removal of the HQ template by annealing. The coated-glassed show good photocatalytic activity in the degradation of NO with up to 15% reduction of NO concentration in three successive photocatalytic cycles of 5 h each. Surface Scanning Electron Microscopy (SEM) images show that the TiO2-coating is composed of large grains that are made up of finer subgrains resulting in a porous structure with an average pore size of 3–4 nm. Transmission Electron Microscopy (TEM) images show two regions, a porous columnar structure on top and a denser region over the glass substrate. Energy Dispersive X-Ray (EDX) analysis, nanocrystal electron diffraction and Raman spectroscopy confirm the presence of the anatase phase, which, together with the porosity of the material, accounts for the observed photocatalytic activity. © 2022 by the authors. Licensee MDPI, Basel, Switzerland.

Idioma: Inglés

DOI: 10.3390/coatings12040488

Año: 2022

Publicado en: COATINGS 12, 4 (2022), 488 [13 pp.]
ISSN: 2079-6412

Factor impacto JCR: 3.4 (2022)

Categ. JCR: MATERIALS SCIENCE, COATINGS & FILMS rank: 9 / 20 = 0.45 (2022) - Q2 - T2
Categ. JCR: PHYSICS, APPLIED rank: 57 / 160 = 0.356 (2022) - Q2 - T2
Categ. JCR: MATERIALS SCIENCE, MULTIDISCIPLINARY rank: 174 / 343 = 0.507 (2022) - Q3 - T2

Factor impacto CITESCORE: 4.7 - Physics and Astronomy (Q2) - Materials Science (Q2)

Factor impacto SCIMAGO: 0.513 - Materials Chemistry (Q2) - Surfaces, Coatings and Films (Q2) - Surfaces and Interfaces (Q2)

Financiación: info:eu-repo/grantAgreement/ES/MCIU-FEDER/RTC-2017-6504-5

Tipo y forma: Article (Published version)

Área (Departamento): Área Química Inorgánica (Dpto. Química Inorgánica)