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Open AccessArticle

Development of Novel Polymer Supported Nanocomposite GO/TiO2 Films, Based on poly(L-lactic acid) for Photocatalytic Applications

Laboratory of Environmental Pollution Control, Department of Chemistry, Aristotle University of Thessaloniki, GR–541 24 Thessaloniki, Greece
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Appl. Sci. 2020, 10(7), 2368; https://doi.org/10.3390/app10072368
Received: 26 February 2020 / Revised: 11 March 2020 / Accepted: 20 March 2020 / Published: 30 March 2020
(This article belongs to the Special Issue Applications and Development of Bioplastics)
In the present study the development of novel polymer-supported nanocomposite graphene oxide (GO)–TiO2 films, based on poly(L-lactic acid), one of the most exploited bioplastics worldwide, was explored for photocatalytic applications. The nanocomposites were synthesized and evaluated as photocatalysts for the removal of a mixture of nine antibiotics, consisting of two sulphonamides (sulfamethoxazole, sulfadiazine), three fluoroquinolones (levofloxacin, norfloxacin, moxifloxacin), one anti-TB agent (isoniazid), one nitroimidazole (metronidazole), one lincosamide (lincomycin) and one diaminopyrimidine (trimethoprim), which are commonly found in wastewaters. The films were synthesized using 1 wt% GO and different TiO2 content (10, 25, and 50 wt%) and characterized using Fourier transform infrared spectroscopy (FTIR), wide-angle X-ray diffraction (WAXD), thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). Findings confirmed the successful immobilization of GO/TiO2 in all cases. The PLLA–GO–TiO2 50 wt% composite film demonstrated higher photocatalytic efficiency and, thus, was further investigated demonstrating excellent photostability and reusability even after four cycles. Overall, PLLA–GO–TiO2 50 wt% nanocomposite demonstrated high efficiency in the photocatalytic degradation of the antibiotics in various matrices including pure water and wastewater. View Full-Text
Keywords: antibiotics; bioplastics; graphene oxide; nanocomposites; photocatalysis; poly (L-lactic acid); titanium dioxide antibiotics; bioplastics; graphene oxide; nanocomposites; photocatalysis; poly (L-lactic acid); titanium dioxide
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Malesic Eleftheriadou, N.; Ofrydopoulou, A.; Papageorgiou, M.; Lambropoulou, D. Development of Novel Polymer Supported Nanocomposite GO/TiO2 Films, Based on poly(L-lactic acid) for Photocatalytic Applications. Appl. Sci. 2020, 10, 2368.

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