Εξειδίκευση τύπου :	Άρθρο σε επιστημονικό περιοδικό
Τίτλος:	Enhancing the Photocatalytic Activity of Immobilized TiO2 Using Laser-Micropatterned Surfaces
Δημιουργός/Συγγραφέας:	Giannakis, Theodoros Zervou, Sevasti-Kiriaki Triantis, Theodoros M. Christophoridis, Christophoros Bizani, Erasmia Starinskiy, Sergey V. Koralli, Panagiota [EL] Μούσδης, Γεώργιος Α.[EN] Mousdis, George A. Hiskia, Anastasia [EL] Κάνδυλα, Μαρία[EN] Kandyla, Maria
Ημερομηνία:	2024
Γλώσσα:	Αγγλικά
ISSN:	2076-3417
DOI:	10.3390/app14073033
Περίληψη:	In the past, the application of TiO2 slurry reactors has faced difficulties concerning the recovery and reusability of the catalyst. In response to these challenges, immobilized photocatalyst systems have been investigated, wherein the catalyst is fixed onto a solid support, frequently with reduced photocatalytic performance. In the present study, thin TiO2 films were developed in the anatase phase by the sol-gel process and spin-cast on laser-microstructured silicon substrates, to form photocatalytic surfaces of increased activity. The TiO2 films were thoroughly characterized using SEM-EDX, XRD, UV–Vis spectroscopy, and Raman spectroscopy. The photocatalytic activity of these surfaces was evaluated by the degradation of atrazine in aqueous solution under UV irradiation. Their photocatalytic activity was found to be significantly enhanced (mean kobs 24.1 × 10−3 min−1) when they are deposited on laser-microstructured silicon compared with flat silicon (mean kobs 4.9 × 10−3 min−1), approaching the photocatalytic activity of sol-gel TiO2 fortified with Degussa P25, used as a reference material (mean kobs 32.7 × 10−3 min−1). During the photocatalytic process, several transformation products (TPs) of atrazine, namely 2-chloro-4-(isopropylamino)-6-amino-s-triazine (CIAT), 2-chloro-4-amino-6-(ethylamino)-s-triazine (CAET), and 2-chloro-4.6-diamino-s-triazine (CAAT), were identified with LC–MS/MS. The stability of the photocatalytic surfaces was also investigated and remained unchanged through multiple cycles of usage. The surfaces were further tested with two other pollutants, i.e., 2,4,6-trichlorophenol and bisphenol-a, showing similar photocatalytic activity as with atrazine.
Τίτλος πηγής δημοσίευσης:	Applied Sciences
Τόμος/Κεφάλαιο:	14
Τεύχος:	7
Θεματική Κατηγορία:	[EL] Νανοτεχνολογία[EN] Nanotechnology [EL] Περιβαλλοντική τεχνολογία. Υγειονομική μηχανική[EN] Environmental technology. Sanitary engineering [EL] Χημική μηχανική[EN] Chemical engineering [EL] Εφαρμοσμένη οπτική. Φωτονική[EN] Applied optics. Photonics
Λέξεις-Κλειδιά:	immobilized TiO2 photocatalysis laser patterned silicon atrazine 2,4,6-trichlorophenol bisphenol-a
Χρηματοδότης:	European Union
EU Grant:	Photocatalytic reactors for water and liquid waste purification with immobilized photocatalysts on micro/nanopatterned surfaces
EU Grant identifier:	MIS 5185074
Κάτοχος πνευματικών δικαιωμάτων:	© 2024 by the authors. Licensee MDPI, Basel, Switzerland.
Όροι και προϋποθέσεις δικαιωμάτων:	This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https:// creativecommons.org/licenses/by/ 4.0/).
Ηλεκτρονική διεύθυνση στον εκδότη (link):	https://doi.org/10.3390/app14073033
Εμφανίζεται στις συλλογές:	Ινστιτούτο Θεωρητικής και Φυσικής Χημείας (ΙΘΦΧ) - Επιστημονικό έργο