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Photocatalytic Activity in the In-Flow Degradation of NO on Porous $TiO_{2}$–Coated Glasses from Hybrid Inorganic–Organic Thin Films Prepared by a Combined ALD/MLD Deposition Strategy
| Content Provider | MDPI |
|---|---|
| Author | Aida, González Jes, ús J. Pérez-Torrente Azpiroz, Ramón Borraz, Marina Mansilla, Catalina Iglesias, Manuel |
| Copyright Year | 2022 |
| Description | A combined ALD/MLD (where ALD and MLD stand for atomic and molecular layer deposition, respectively) deposition strategy using $TiCl_{4}$, $H_{2}$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 $TiO_{2}$ layers, by pulsing $TiCl_{4}/H_{2}$O (ALD), and hybrid layers, using $TiCl_{4}$/HQ (MLD), results in the formation of thin films that are precursors for porous $TiO_{2}$-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 $TiO_{2}$-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. |
| Starting Page | 488 |
| e-ISSN | 20796412 |
| DOI | 10.3390/coatings12040488 |
| Journal | Coatings |
| Issue Number | 4 |
| Volume Number | 12 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2022-04-05 |
| Access Restriction | Open |
| Subject Keyword | Coatings Spectroscopy Hybrid Inorganic-organic Molecular Layer Deposition (mld) Atomic Layer Deposition (ald) Titanium Dioxide Anatase Nitrogen Monoxide Photocatalysis |
| Content Type | Text |
| Resource Type | Article |
