Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Photocatalytic Degradation of Fluoroquinolone Antibiotics in Solution

Version 1 : Received: 8 January 2022 / Approved: 10 January 2022 / Online: 10 January 2022 (14:59:49 CET)

How to cite: Machín, A.; Márquez, F.; Fontánez, K.; Duconge, J.; Cotto, M.; Morant, C.; Petrescu, F.I.T. Photocatalytic Degradation of Fluoroquinolone Antibiotics in Solution. Preprints 2022, 2022010122 (doi: 10.20944/preprints202201.0122.v1). Machín, A.; Márquez, F.; Fontánez, K.; Duconge, J.; Cotto, M.; Morant, C.; Petrescu, F.I.T. Photocatalytic Degradation of Fluoroquinolone Antibiotics in Solution. Preprints 2022, 2022010122 (doi: 10.20944/preprints202201.0122.v1).

Abstract

The photocatalytic degradation of two quinolone-type antibiotics (ciprofloxacin and levofloxacin) in aqueous solution was studied, using catalysts based on ZnO nanoparticles, which were synthesized by a thermal procedure. The efficiency of ZnO was subsequently optimized by incorporating different co-catalysts of gC3N4, reduced graphene oxide and nanoparticles of gold. The catalysts were fully characterized by electron microscopy (TEM and SEM), XPS, XRD, Raman, and BET surface area. The most efficient catalyst was 10%[email protected]%rGO-3%gC3N4, allowing to obtain degradations of both pollutants above 96%. This catalyst has the largest specific area, and its activity has been related to a synergistic effect, involving factors as relevant as the surface of the material and the ability to absorb radiation in the visible region, mainly produced by the incorporation of rGO and gC3N4 to the semiconductor. The use of different scavengers during the catalytic process, was used to establish the possible photodegradation mechanism of both antibiotics.

Keywords

ciprofloxacin; levofloxacin; ZnO; gC3N4; rGO; Au nanoparticles.

Subject

CHEMISTRY, Physical Chemistry

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