Preparation of Ag/Ag 2 W 2 O 7 nanoribbons and their SERS detection for dye molecules

Ag 2 W 2 O 7 nanoribbons were synthesized by hydrothermal method and then Ag/Ag 2 W 2 O 7 NRs were developed by in situ chemical‐reduction with NaBH 4 . 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/Ag 2 W 2 O 7 NRs. It was found that the detection of limit and enhancement factor for methylene blue is 8.91 × 10 −13   m and 2.78 × 10 7 , whereas the counterpart for Rhodamine B is 8.71 × 10 −12   m and 4.34 × 10 6 on the Ag/Ag 2 W 2 O 7 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.