Facile Preparation of Ag-NP-Deposited HRGB-SERS Substrate for Detection of Polycyclic Aromatic Hydrocarbons in Water

In this study, a surface-enhanced Raman scattering (SERS) substrate based on high-refractive-index reflective glass beads (HRGBs) was prepared by facile method and successfully applied to the detection of polycyclic aromatic hydrocarbons (PAHs). The HRGB-SERS depositing silver nanoparticles (Ag NPs) onto surface HRGBs. preparation procedure simplified accelerating hydrolysis (3-Aminopropyl) trimethoxysilane (APTMS) increasing concentration Ag NPs. Compared with previous methods, one round deposition has same performance, simpler process, lower cost. Additionally, halide ions were used modify increase sensitivity PAHs. Adding 10 mM KBr solution found achieve best modification effect. Under optimal conditions, pyrene improved 3 orders magnitude (10−7 M). Due substrate’s excellent rapid identification trace spiked water samples mixed anthracene, phenanthrene, realized using spectrometer only volume μL samples.