RT info:eu-repo/semantics/article
T1 Encapsulation of copper nanoparticles in electrospun nanofibers for sustainable removal of pesticides
A1 Quilez Molina, Ana Isabel
A1 Barroso Solares, Suset
A1 Hurtado García, Violeta
A1 Heredia Guerrero, José Alejandro
A1 Rodríguez Méndez, María Luz
A1 Rodríguez Pérez, Miguel Ángel
A1 Pinto Sanz, Javier
K1 Materials science
K1 Nanochemistry
K1 Chlorpyrifos
K1 Copper oxide
K1 Catalysis
K1 Electrospinning
K1 Clorpirifos
K1 Óxido de cobre
K1 Catálisis
K1 Electrohilado
K1 2210.28-1  Preparación y Caracterización de Materiales Inorgánicos
AB The excellent catalytic properties of copper nanoparticles (CuNPs) for the degradation of the highly toxic and recalcitrant chlorpyrifos pesticide are widely known. However, CuNPs generally present low stability caused by their high sensitivity to oxidation, which leads to a change of the catalytic response over time. In the current work, the immobilization of CuNPs into a polycaprolactone (PCL) matrix via electrospinning was demonstrated to be a very effective method to retard air and solvent oxidation and to ensure constant catalytic activity in the long term. CuNPs were successfully anchored into PCL electrospun fibers in the form of Cu2O at different concentrations (from 1.25 wt % to 5 wt % with respect to the PCL), with no signs of loss by leaching out. The PCL mats loaded with 2.5 wt % Cu (PCL-2.5Cu) almost halved the initial concentration of pesticide (40 mg/L) after 96 h. This process was performed in two unprompted and continuous steps that consisted of adsorption, followed by degradation. Interestingly, the degradation process was independent of the light conditions (i.e., not photocatalytic), expanding the application environments (e.g., groundwaters). Moreover, the PCL-2.5Cu composite presents high reusability, retaining the high elimination capability for at least five cycles and eliminating a total of 100 mg/L of chlorpyrifos, without exhibiting any sign of morphological damages.
PB American Chemical Society
SN 1944-8244
YR 2023
FD 2023
LK https://uvadoc.uva.es/handle/10324/59151
UL https://uvadoc.uva.es/handle/10324/59151
LA eng
NO ACS Applied Materials & Interfaces 2023, vol. 15, n. 16, pp. 20385–20397
NO Producción Científica
DS UVaDOC
RD 19-oct-2024