Toxic Ag⁺ detection based on Au@Ag core shell nanostructure formation using Tannic acid assisted synthesis of Pullulan stabilized gold nanoparticles.

ABSTRACT: Herein, a sensitive colorimetric detection strategy is proposed for Ag⁺ detection based on the use of environmentally friendly synthesis of gold nanoparticles (AuNPs), at room temperature, using (tannic acid, TA), as the reductant and pullulan (PUL) as stabilizing agent. The colloidal solution (TA/PUL-AuNPs), at the optimal synthesis conditions, showed maximum absorbance at 529 nm with a berry red color. TEM and FESEM validated that the particles are spherical and monodispersed, while other characterization results elucidated the role of pullulan in the nano-synthesis. Ag⁺ addition to the probe (TA/PUL-AuNPs), pH 11, resulted in naked-eye color changes, owing to Au@Ag core shell nanostructure formation. Further, the added Ag⁺ is reduced to AgNPs, on the sur

SUBMITTER: Jayeoye TJ 

PROVIDER: S-EPMC9892037 | biostudies-literature | 2023 Feb

REPOSITORIES: biostudies-literature