Abstract
The dispersion of para-nitroaniline (p-NA) in water poses a threat to the environment and human health. Therefore, the development of functional adsorbents to remove this harmful compound is crucial to the implementation of wastewater purification strategies, and electrospun mats represent a versatile and cost-effective class of materials that are useful for this application. In the present study, we tested the ability of some polyethersulfone (PES) nanofibers containing adsorbed porphyrin molecules to remove p-NA from water. The functional mats in this study were obtained by two different approaches based on fiber impregnation or doping. In particular, meso-tetraphenyl porphyrin (H2TPP) or zinc(II) meso-tetraphenyl porphyrin (ZnTPP) were immobilized on the surface of PES fiber mats by dip-coating or added to the PES electrospun solution to obtain porphyrin-doped PES mats. The presence of porphyrins on the fiber surfaces was confirmed by UV–Vis spectroscopy, fluorescence measurements, and XPS analysis. p-NA removal from water solutions was spectrophotometrically detected and evaluated.
Highlights
Amines are used for many applications, but their release in the environment needs to be carefully monitored and controlled
Fiber impregnation was achieved by dip-coating PES electrospun mats in 5 μM H2 TPP or zinc(II) meso-tetraphenyl porphyrin (ZnTPP)
Porphyrin adsorption was promoted by non-covalent interactions, Fiber impregnation was achieved by dip-coating PES electrospun mats in 5 μM H2TPP or which depend on several factors, including the specific surface area and mobility of dye molecules
Summary
Amines are used for many applications, but their release in the environment needs to be carefully monitored and controlled. Porphyrins and metallo-porphyrins are widelyfibers used applications in photocatalysis heavy metal removal [23,31,32,33], and electrospun for developingwith sensing systems to their coordination sites for axial ligation pollutants and significant functionalized porphyrins aredue suitable for the detection and removal of unwanted in air optical modifications which provide evidence of successful core complexation [34]. The ability of porphyrin-modified PES haveIn been to obtain porphyrin on substrates nanofibers to remove p-NA the from ourwas knowledge, little data reporting the usePES of. Measurements, and XPS analysis, and p-NA removal from water solutions was spectrophotometrically detected and evaluated
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