Add time:08/31/2019         Source:sciencedirect.com

This manuscript demonstrated a simple and efficient method to detect 1-PYRENECARBOXYLIC ACID (cas 19694-02-1) dissolved in water solution at nanoscale level via surface enhanced Raman scattering hot spot with reduced graphene oxide/silver nanoparticles (Ag-NPs) nanocomposites (RGO/Ag-NPs). Ag-NPs were attached in situ onto RGO surface with different concentrations of AgNO3 in the presence of aqueous solution of 1-pyrenecarboxylic acid. The morphology and structures of the as-prepared samples were characterised with FT-IR, UV–vis absorption, DLS, Zeta potentials, Raman spectroscopy, TEM and XRD. At higher AgNO3 concentration, Ag-NPs get aggregated onto the surface of RGO and created surface enhanced Raman spectroscopy (SERS) hot spot which detect 1-pyrenecarboxylic acid due to the greatly enhanced electromagnetic field. This novel concept can be extended for sensing different water pollutants including polycyclic aromatic hydrocarbons and benzene derivatives.

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