DETECTING OF METHYLENE BLUE USING SURFACE ENHANCED RAMAN SCATTERING BASED ON STRUCTURE PLATINUM NANOPARTICLES

Abstract

Noble metal nanoparticles (e.g., Au, Ag, Pt) possess notable optical properties, finding diverse applications in fields like biology and environmental science. Surface-enhanced Raman scattering (SERS) is extensively explored for trace organic compound detection using nanostructured metal frameworks. This study quantitatively assessed Methylene blue (MB) detection via SERS employing Platinum nanoparticles (PtNPs), synthesized via a simple one-step chemical method. PtNPs exhibited spherical morphology, averaging 4-5 nm in size, with an absorption spectrum showing a singular peak at ~292 nm, intensifying with higher H₂PtCl₆ concentrations. X-ray diffraction (XRD) confirmed well - crystallized, impurity-free PtNP samples, with a crystal size of 4.8 nm. Notably, MB detection at low concentrations and a linear SERS intensity-MB concentration relationship (Isers = 44.819*C_MB + 483.14; R² = 0.996) were observed, with a minimum detection limit of 0.5 ppm, indicating Pt nanoparticles' potential as effective SERS sensors for detecting MB in the environment.