New efficient inorganic-organic nanofibers electrospun membrane for fluorescence detection and removal of mercury (II) ions

摘要

In this study, a new inorganic-organic nano fibrous membrane (PTSNFM) has been fabricated via immobilization of carbazol-based Schiff base (5) into a polyvinyl alcohol (PVA) - tetraethyl orthosilicate (TEOS) polymeric support using the electrospinning method. PTSNFM has been used as an optode to detect and remove of mercury (II) ions. The characterization of PTSNFM has been fully carried out using different methods including FE-SEM, TEM, AFM, viscosity, surface tension and conductivity. FE-SEM and FT-IR analysis demonstrated the binding of Hg (II) to the PTSNFM via chelating of Hg (II) to the Schiff base ligand. PTSNFM can detect Hg (II) in the dynamic range of 0.020-0.50 ng/mL, with the LOD of 0.0180 ng/mL. PTSNFM has been evaluated in the some aqueous real samples showing the removal efficiency in the range of 97.78-99.41%. (C) 2018 Published by Elsevier B.V.