Photodeposition of silver on Zinc/Calcium ferrite nanoparticles: A contribution to efficient effluent remediation and catalyst reutilization

The efficient photodegradation of textile dyes is still a challenge, especially considering resistant azo dyes. In this work, zinc/calcium mixed ferrite nanoparticles prepared by the sol-gel method were coupled with silver by a photodeposition method to enhance the photocatalytic potency. The obtain...

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Bibliographic Details
Published in:Nanomaterials (Basel, Switzerland) Switzerland), 2021-03, Vol.11 (4), p.831
Main Authors: Fernandes, Ricardo Jorge Cunha, Magalhães, Carlos A. B., Rodrigues, Ana Rita Oliveira, Almeida, B. G., Pires, Ana, Pereira, André Miguel, Araujo, João Pedro, Castanheira, Elisabete M. S., Coutinho, Paulo J. G.
Format: Article
Language:English
Subjects:
Aqueous solutions
Azo dyes
Calcium
calcium ferrite
Calcium ferrites
Catalysts
Dyes
Effluent remediation
Engenharia e Tecnologia
Magnetic fields
Magnetic measurement
Magnetic nanoparticles
Nanoparticles
Nanotecnologia
Photocatalysis
Photocatalytic activities
Photodegradation
Radiation
Science & Technology
Silver
Silver photodeposition
Sol-gel processes
Zinc
Zinc ferrites
Zinc/calcium ferrite
Água potável e saneamento
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Summary:The efficient photodegradation of textile dyes is still a challenge, especially considering resistant azo dyes. In this work, zinc/calcium mixed ferrite nanoparticles prepared by the sol-gel method were coupled with silver by a photodeposition method to enhance the photocatalytic potency. The obtained zinc/calcium ferrites are mainly cubic-shaped nanoparticles sized 15 ± 2 nm determined from TEM and XRD and an optical bandgap of 1.6 eV. Magnetic measurements indicate a superparamagnetic behavior with saturation magnetizations of 44.22 emu/g and 27.97 emu/g, respectively, for Zn/Ca ferrite and Zn/Ca ferrite with photodeposited silver. The zinc/calcium ferrite nanoparticles with photodeposited silver showed efficient photodegradation of the textile azo dyes C.I. Reactive Blue 250 and C.I. Reactive Yellow 145. Subsequent cycles of the use of the photocatalyst indicate the possibility of magnetic recovery and reutilization without a significant loss of efficiency. This work was supported by the Portuguese Foundation for Science and Technology (FCT) in the framework of the Strategic Funding of CF-UM-UP (UIDB/04650/2020) and research project PTDC/QUI-QFI/28020/2017 (POCI-01-0145-FEDER-028020) funded by FCT, FEDER, PORTUGAL2020, and COMPETE2020.
ISSN:2079-4991
2079-4991
DOI:10.3390/nano11040831