Electrospun Nanofiber Dopped with TiO2 and Carbon Quantum Dots for the Photocatalytic Degradation of Antibiotics
Year: 2024
Type: article
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.
Source: Polymers
Language: English
Field: Energy
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $3,069
Awards: G1169335522, Centro de Investigação em Saúde e Tecnologia, G143066982, G1483381719, G1521607044, G1537646698, G155983056, G1578237752, G1690109813, G1692201249, G2149047050, G2219685250, G2320776104, G235107182, G2637256346, G2736865772, Centro de Investigação em Saúde e Tecnologia, Centro de Estudos do Ambiente e do Mar, G312535267, G3534458110, Centro de Estudos do Ambiente e do Mar, G4074587301, G4090066734, G4175318206, G4631959511, G471092553, G4900599870, Centro de Física das Universidades do Minho e do Porto, G5389921940, G587154774, G5999395293, G6039851006, G670901311, G6825028525, G684853495, G6997658380, G7665809008, Centro de Física das Universidades do Minho e do Porto, G8147792175, Sem título, G8483056154, Centro de Estudos do Ambiente e do Mar, G8833117603, G8945308682
OpenAlex ID: W4403637710