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Synthesis of noble metal-decorated NH2-MIL-125 titanium MOF for the photocatalytic degradation of acetaminophen under solar irradiation

Author
Muelas-Ramos, V.; Belver Coldeira, Carolinauntranslated; Rodriguez, J. J.; Bedia García-Matamoros, Jorgeuntranslated
Entity
UAM. Departamento de Ingeniería Química
Publisher
Elsevier
Date
2021-10-01
Citation
10.1016/j.seppur.2021.118896
Separation and Purification Technology 272 (2021): 118896
 
 
 
ISSN
1383-5866 (print)
DOI
10.1016/j.seppur.2021.118896
Funded by
This research was funded by the State Research Agency (PID2019-106186RB-I00/AEI/10.13039/501100011033). V. Muelas-Ramos thanks to MCIU for BES-2017-082613 grant
Project
Gobierno de España. PID2019-106186RB-I00
Editor's Version
https://doi.org/10.1016/j.seppur.2021.118896
Subjects
Acetaminophen; Noble metal nanoparticles; Photocatalysis; Water treatment; NH2-MIL-125; Química
URI
http://hdl.handle.net/10486/700594
Rights
© 2021 The Authors

Licencia de Creative Commons
Esta obra está bajo una licencia de Creative Commons Reconocimiento-NoComercial-SinObraDerivada 4.0 Internacional.

Abstract

This work reports the solvothermal synthesis of a titanium-based metal organic framework (NH2-MIL-125(Ti)) and the further deposition of palladium, platinum and silver nanoparticles on its framework, with the aim to obtain visible light-driven photocatalysts. The structure of the NH2-MIL-125 was not affected by the incorporation of the metal nanoparticles, while the textural properties changed depending on the metal used. All M/NH2-MIL-125 (M = Pd, Pt, Ag) synthesized materials showed enhanced light absorption in the visible region due to the effect of the metal nanoparticles, which were mainly in reduced state as confirmed by XPS analyses. The metal nanoparticles were between 1.8 and 3.8 nm in size depending of the metal. They were responsible for the reduction in the recombination process, as suggested by photoluminescence measurements. The photocatalytic performance of M/NH2-MIL-125 was tested for the degradation of acetaminophen (ACE) under simulated solar irradiation. Pt/NH2-MIL-125 achieved the highest conversion rate (rate constant of 0.0165 min−1), with complete conversion of the contaminant in less than three hours. Scavengers studies confirmed that O.-2[rad]− radicals play a main role in the degradation process, followed by .OH radicals. The catalytic stability of Pt/NH2-MIL-125 was confirmed upon three successive reaction cycles. Different water matrices were tested to understand the effect of common inorganic ions, being the presence of bicarbonates the most detrimental to the performance of the photocatalytic process
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Google™ Scholar:Muelas-Ramos, V. - Belver Coldeira, Carolina - Rodriguez, J. J. - Bedia García-Matamoros, Jorge

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  • Producción científica en acceso abierto de la UAM [18125]

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