Preparation of Ag/Ag2W2O7 nanoribbons and their SERS detection for dye molecules

Abstract

Abstract Ag2W2O7 nanoribbons were synthesized by hydrothermal method and then Ag/Ag2W2O7 NRs were developed by in situ chemical‐reduction with NaBH4. The samples were characterized by X‐ray diffraction (XRD), scanning electron microscopy, and UV–vis spectroscopy, high‐resolution transmission electron microscope (HRTEM), and Raman spectrum. In addition, methylene blue and Rhodamine B were selected as probe molecules to explore surface‐enhanced Raman scattering effect of Ag/Ag2W2O7 NRs. It was found that the detection of limit and enhancement factor for methylene blue is 8.91 × 10−13 m and 2.78 × 107, whereas the counterpart for Rhodamine B is 8.71 × 10−12 m and 4.34 × 106 on the Ag/Ag2W2O7 NRs substrate. Relative standard deviation was not exceed 19% when methylene blue concentration reached 1.0 × 10−6 m, it can be seen that the substrate has good uniformity, strength stability and high repeatability, which can be applied to the detection of organic dyes and additives.