Highly silver-selective fluorescent sensor based on functionalized nanoporous silica (SBA-Pr-NMP) in aqueous media

Abstract

Abstract: A new chemosensor based on silica entitled SBA-Pr-NMP was prepared by modification of SBA-15 with (3-aminopropyl)triethoxysilane and 3-methyl-1-phenyl-5-oxo-1H-pyrazole-4-carbaldehyde. The functionalized structure was characterized and confirmed via various methods like FT-IR, XRD, EDX, SEM, TGA, and BET. The sensing properties of SBA-Pr-NMP were studied using fluorescence spectroscopy in the presence of various metal ions, and the intensity increased remarkably with Ag+ ion compared to other cations. Also, a good linear relationship was obtained between the fluorescence intensity of SBA-Pr-NMP and the concentration of Ag+ with a calculated detection limit of 2.85 × 10–7 M. Graphical abstract: [Figure not available: see fulltext.]