Improved SERS detection of anionic pollutant with Ag Nanoparticles-decorated ZnAl layered double hydroxide nanosheets array

作者：Sun, Kexi; Tang, Zihui; Zhao, Qiangsheng; Deng, Quan; Wang, Xiujuan^*; Tang, Haibin^*

来源：Materials Letters, 2022, 314: 131878.

DOI：10.1016/j.matlet.2022.131878

• Raman
• Nanocomposites
• SERS
• Layered double hydroxide
• Anion analytes
• Enrichment

Enrichment is a valuable strategy to further improve the detection limit. In this work, ZnAl-layered double hydroxide (ZnAl-LDH) nanosheets array in situ synthesized on Al foil was used as the enrichment frame for surface-enhanced Raman spectroscopy (SERS) substrate to further improve the detection limit of anionic pollutant. High density of Ag nanoparticles (Ag-NPs) with an average diameter of 29 nm sputtered onto the surface of the ZnAl-LDH could create localized electromagnetic field enhancement for SERS detection. The as-prepared Ag-NPs@ZnAl-LDH composite substrates showed improved sensitivity to anionic pollutants methyl orange and erythrosin B, demonstrating the promising potentials to improve the detection limit of anion analytes based on SERS spectroscopy.

• 单位
  中国科学院