Fundamental Study of Electrospun Pyrene–Polyethersulfone Nanofibers Using Mixed Solvents for Sensitive and Selective Explosives Detection in Aqueous Solution

摘要: Fluorescent pyrene–polyethersulfone (Py–PES) nanofibers were prepared through electrospinning technique using mixed solvents. The effects of solvent ratio and polymer/fluorophore concentrations on electrospun nanofiber’s morphology its sensing performance systematically investigated optimized. Py–PES under optimized conditions further applied for highly sensitive detection explosives, such as picric acid (PA), 2,4,6-trinitrotoluene (TNT), 2,4-dinitrotoluene (DNT), 1,3,5-trinitroperhydro-1,3,5-triazine (RDX) in aqueous phase with limits (S/N = 3) 23, 160, 400, 980 nM, respectively. Stern–Volmer (S–V) plot Py excimer fluorescence quenching by PA shows two linear regions at low (0–1 μM) high concentration range (>1 a constant 1.263 × 106 M–1 5.08 104 M–1, On the contrary, S–V plots TNT, DNT, RDX display an overall linearity entire...