Enhanced visible-light photodegradation of fluoroquinolone-based antibiotics and E. coli growth inhibition using Ag–TiO₂ nanoparticles

Abstract

Ag nanoparticles decorated-TiO2 P25 are a viable alternative for the degradation, through a rutile-mediated mechanism, of fluoroquinolone-based antibiotics under visible light irradiation and, at the same time, for bacteria inactivation in water.

Reusable and Antibacterial Polymer‐Based Nanocomposites for the Adsorption of Dyes and the Visible‐Light‐Driven Photocatalytic Degradation of Antibiotics

“…The common antibiotics CIP and NFX were chosen as models in this study. As we reported in our former publication, [28] Ag-TiO 2 NPs can degrade CIP and NFX under visible-light irradiation. Therefore, we expected that CIP and NFX could be degraded also by the nanocomposites under visible-light irradiation, thanks to the presence of Ag-TiO 2 NPs in the nanocomposites.…”

“…The preparation pathway for the proposed Fe 3 O 4 /P(NIPAM-co-MAA)/Ag-TiO 2 nanocomposites is schematically illustrated in Scheme S1, Supporting Information, and involves the combination of magnetic Fe 3 O 4 /P(NIPAM-co-MAA) microspheres, previously reported from Wang et al, [27] and Ag-TiO 2 NPs, as previously reported from Wang et al [28] The details are reported in the Experimental Section. The possible explanation about the interaction between the Fe 3 O 4 /P(NIPAM-co-MAA) microspheres and the Ag-TiO 2 NPs in the nanocomposites is that the carboxylate groups on Fe 3 O 4 /P(NIPAM-co-MAA) microspheres may transfer their acidic hydrogen to the surface of Ag-TiO 2 NPs, forming a bridging hydroxyl group and a chemisorbed methacrylate moiety.…”

Conversion of scrap iron into ultrafine α-Fe2O3 nanorods for the efficient visible light photodegradation of ciprofloxacin

“…23 Wang et al showed 92% CIP degradation could be achieved in 240 min under visible light irradiation by Ag-TiO 2 nanoparticles synthesized via a photochemical method. 24 In a recent work by Li et al, g-Fe 2 O 3 @ZnO core-shell heterostructures synthesized via a hydrothermal sintering and atomic layer deposition method demonstrated the 92.5% photodegradation of CIP in 60 min under simulated light conditions. 25 Chatterjee et al synthesized an iron-copper-based metal-organic framework and reported the 74.48% photocatalytic degradation of CIP.…”

Synthesis, characterization and photocatalytic properties of nanostructured lanthanide doped β-NaYF4/TiO2 composite films

“…However, especially in the most commonly used crystalline anatase phase, TiO 2 suffers from the drawback of possessing a large bandgap (~ 3.2 eV) which, in turn, implies the use of UV light irradiation for its activation. Therefore, over the years, several methods, including metal and non-metal doping, decoration with noble metals and combination with binary or ternary selenide nanoparticles, have been investigated to enhance the activity of TiO 2 under visible-light by reducing its bandgap and/or by decreasing its electron–hole pair recombination rate 14 – 21 . The need to obtain also a product with a vast range of applications exploiting the largest available energy source, i.e.…”