Eletrospun Nanofiber Dopped with TiO2 and Carbon Quantum Dots for the Photocatalytic Degradation of Antibiotics

Valentina Silva; Diana L. D. Lima; Etelvina de Matos Gomes; Bernardo Almeida; Vânia Calisto; Rosa M. F. Baptista; Goreti Pereira

doi:10.20944/preprints202409.2308.v1

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preprints.org > chemistry and materials science > materials science and technology > doi: 10.20944/preprints202409.2308.v1

Preprint Article Version 1 This version is not peer-reviewed

Eletrospun Nanofiber Dopped with TiO2 and Carbon Quantum Dots for the Photocatalytic Degradation of Antibiotics

Valentina Silva

Diana L. D. Lima

Etelvina de Matos Gomes

^* ,

Version 1 : Received: 27 September 2024 / Approved: 29 September 2024 / Online: 29 September 2024 (10:44:38 CEST)

How to cite: Silva, V.; Lima, D. L. D.; de Matos Gomes, E.; Almeida, B.; Calisto, V.; Baptista, R. M. F.; Pereira, G. Eletrospun Nanofiber Dopped with TiO2 and Carbon Quantum Dots for the Photocatalytic Degradation of Antibiotics. Preprints 2024, 2024092308. https://doi.org/10.20944/preprints202409.2308.v1 Silva, V.; Lima, D. L. D.; de Matos Gomes, E.; Almeida, B.; Calisto, V.; Baptista, R. M. F.; Pereira, G. Eletrospun Nanofiber Dopped with TiO2 and Carbon Quantum Dots for the Photocatalytic Degradation of Antibiotics. Preprints 2024, 2024092308. https://doi.org/10.20944/preprints202409.2308.v1

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MDPI and ACS Style

Silva, V.; Lima, D. L. D.; de Matos Gomes, E.; Almeida, B.; Calisto, V.; Baptista, R. M. F.; Pereira, G. Eletrospun Nanofiber Dopped with TiO2 and Carbon Quantum Dots for the Photocatalytic Degradation of Antibiotics. Preprints 2024, 2024092308. https://doi.org/10.20944/preprints202409.2308.v1

APA Style

Silva, V., Lima, D. L. D., de Matos Gomes, E., Almeida, B., Calisto, V., Baptista, R. M. F., & Pereira, G. (2024). Eletrospun Nanofiber Dopped with TiO2 and Carbon Quantum Dots for the Photocatalytic Degradation of Antibiotics. Preprints. https://doi.org/10.20944/preprints202409.2308.v1

Chicago/Turabian Style

Silva, V., Rosa M. F. Baptista and Goreti Pereira. 2024 "Eletrospun Nanofiber Dopped with TiO2 and Carbon Quantum Dots for the Photocatalytic Degradation of Antibiotics" Preprints. https://doi.org/10.20944/preprints202409.2308.v1

Abstract

Novel photocatalysts were synthesized through the association of carbon quantum dots (CQDs) with commercial (P25) titanium dioxide (TiO2) by sonication. The resulting TiO2/CQDs compo-site was then incorporated into the polyamide 66 (PA66) biopolymer nanofibers using the elec-trospinning technique, considering a composite nanoparticles-to-polymer ratio of 1:2 in the elec-trospinning precursor solution. The produced nanofibers presented suitable morphology and were tested for the photocatalytic degradation under simulated solar radiation of 10 mg/L of amoxicillin (AMX) and sulfadiazine (SDZ), in phosphate buffer solution (pH 8.06) and river wa-ter, using 1.5 g/L of photocatalyst. The presence of the photocatalyst increased the removal of AMX in phosphate buffer solution by 30 times, reducing the AMX degradation half-life time from 62 ± 1 h (without catalyst) to 1.98 ± 0.06 h. Moreover, SDZ degradation half-life time in phosphate buffer solution was reduced from 5.4 ± 0.1 h (without catalyst) to 1.87 ± 0.05 h in the presence of the photocatalyst. Furthermore, the PA66/TiO2/CQDs were also efficient in river wa-ter samples, and maintained their performance in at least three cycles of SDZ photodegradation in river water. The presented results evidence that the produced photocatalyst can be a promis-ing and sustainable solution for antibiotics’ efficient removal from water.

Keywords

Water treatment; Pharmaceuticals; Electrospinning; Photocatalysis; Amoxicillin; Sulfadiazine

Subject

Chemistry and Materials Science, Materials Science and Technology

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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