Article (Scientific journals)
Nanocomposites of titanium dioxide and peripherally modified metallophthalocyanines for the photocatalytic degradation of sulfamethoxazole
Musial, Joanna; Belet, Artium; Dariusz T. Mlynarczyk et al.
2022In Nanomaterials, 12, p. 3279
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Keywords :
photocatalysis; photodegradation; phthalocyanine; sulfamethoxazole; titanium dioxide
Abstract :
[en] Phthalocyanines (Pcs) are often used in photosensitization of titanium(IV) oxide, a commonly employed photocatalyst, as such an approach holds the promise of obtaining highly stable and efficient visible light-harvesting materials. Herein, we report on the preparation, characterization and photoactivity of a series of composites based on TiO2 and peripherally modified metallophthalocyanines: either tetrasulfonated or 4,4′,4′′,4′′′-tetraazaphthalocyanines, with either copper(II), nickel(II) or zinc(II) as the central metal ion. Physicochemical characterization was performed using UV-Vis diffuse reflectance spectroscopy, hydrodynamic particle-size analysis, surface-area analysis using N2 adsorption-desorption measurements and thermogravimetry combined with differential scanning calorimetry. The band-gap energy values were lower for the composites with peripherally modified phthalocyanines than for the commercial TiO2 P25 or the unsubstituted zinc(II) phthalocyanine-grafted TiO2. TG–DSC results confirmed that the chemical deposition, used for the preparation of Pc/TiO2 composites, is a simple and efficient method for TiO2 surface modification, as all the Pc load was successfully grafted on TiO2. The photocatalytic potential of the Pc/TiO2 materials was assessed in the photocatalytic removal of sulfamethoxazole—a commonly used antibacterial drug of emerging ecological concern. To compare the activity of the materials in different conditions, photodegradation tests were conducted both in water and in an organic medium.
Disciplines :
Materials science & engineering
Author, co-author :
Musial, Joanna
Belet, Artium ;  Université de Liège - ULiège > Chemical engineering
Dariusz T. Mlynarczyk;  Poznan University of Medical Sciences
Michal Kryjewski 4;  Poznan University of Medical Sciences
Tomasz Goslinski;  Poznan University of Medical Sciences
Lambert, Stéphanie  ;  Université de Liège - ULiège > Chemical engineering ; Université de Liège - ULiège > Department of Chemical Engineering > Nanomaterials, Catalysis, Electrochemistry
Poelman Dirk;  University of Ghent
Beata J. Stanisz;  Poznan University of Medical Sciences
Language :
English
Title :
Nanocomposites of titanium dioxide and peripherally modified metallophthalocyanines for the photocatalytic degradation of sulfamethoxazole
Publication date :
2022
Journal title :
Nanomaterials
eISSN :
2079-4991
Publisher :
MDPI AG, Basel, Switzerland
Volume :
12
Pages :
3279
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 22 October 2022

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