Εξειδίκευση τύπου :	Άρθρο σε επιστημονικό περιοδικό
Τίτλος:	Salicylic Acid-Modified Sm-TiO2 for Photoluminescence and Photocatalysis under Real Sunlight: Synergistic Effects between Ligand-to-Metal Charge Transfer (LMCT) and Sm3+ Dopant
Δημιουργός/Συγγραφέας:	Lakhdar, Rostom Freyria, Francesca S [EL] Μούσδης, Γεώργιος Α.[EN] Mousdis, George A. Bonelli, Barbara Elghniji, Kais
Ημερομηνία:	2024-08-15
Γλώσσα:	Αγγλικά
ISSN:	1932-7447
DOI:	10.1021/acs.jpcc.4c03459
Άλλο:	39165482
Περίληψη:	A salicylic-acid (SA)-modified samarium-doped TiO2 complex (Sm-TiO2/SA) was synthesized via a sol-gel method followed by impregnation. A Raman Fourier transform IR and X-ray photoelectron spectroscopic study showed that SA (as an electron donor) forms a surface complex on the Sm-TiO2 surface through its phenolic/carboxylic functional groups. In the Sm-TiO2/SA complex, a ligand-to-metal charge transfer (LMCT) is active, inducing a marked red-shift in the absorption spectrum of TiO2, which extends to 550-600 nm. The synergetic effect between the LMCT process and the luminescent properties of the lanthanide ions (Sm3+) is discussed and supported by the photoluminescence spectra. Further photocatalytic experiments (under sunlight) and the study of the effect of different scavengers show the presence of competitive reactions between de-ethylation and cleavage of Rhodamine B (RhB) during its degradation. With the Sm-TiO2/SA complexes, the superoxide radical ion (O2 •-) is the main active species responsible for the N-de-ethylation pathway under sunlight irradiation. The cleavage of RhB by the hydroxyl radical (•OH) appears, instead, to dominate with the Sm-TiO2 photocatalysts.
Τίτλος πηγής δημοσίευσης:	The journal of physical chemistry. C, Nanomaterials and interfaces
Τόμος/Κεφάλαιο:	128
Τεύχος:	32
Θεματική Κατηγορία:	[EL] Ανόργανη χημεία[EN] Inorganic chemistry [EL] Νανοτεχνολογία[EN] Nanotechnology [EL] Φυσική και θεωρητική χημεία[EN] Physical and theoretical chemistry
Λέξεις-Κλειδιά:	absorption oxides ligands ions
Κάτοχος πνευματικών δικαιωμάτων:	© 2024 The Authors. Published by American Chemical Society
Όροι και προϋποθέσεις δικαιωμάτων:	This publication is open and licensed under CC-BY-NC-ND 4.0
Ηλεκτρονική διεύθυνση στον εκδότη (link):	https://doi.org/10.1021/acs.jpcc.4c03459
Εμφανίζεται στις συλλογές:	Ινστιτούτο Θεωρητικής και Φυσικής Χημείας (ΙΘΦΧ) - Επιστημονικό έργο