Synthesis and application of colloidal beta-cyclodextrin-decorated silver nanoparticles for rapid determination of malachite green in environmental water using surface-enhanced Raman spectroscopy

摘要

In this study, a green synthesis method of colloidal silver nanoparticles based on the traditional silver mirror reaction induced by adding beta-cyclodextrin (CD) to [Ag(NH3)(2)](+) solution was proposed. The beta-cyclodextrin-decorated silver nanoparticles (CD-AgNPs) were applied to the rapid determination of malachite green (MG) in environmental water using surface-enhanced Raman spectroscopy (SERS) with peaks at 1175, 1220, 1298, and 1618 cm(-1). The effects of the synthesis parameters including the amount of [Ag(NH3)(2)](+) solution and CD, and the effects of analysis parameters including the amount and mixing time of CD-AgNPs and acidity regulator, were investigated. The analytical response to MG was linear in a concentration range of 0.010-0.15 mg L-1, with the correlation coefficients (R-2) of 0.9916-0.9988 and a detection limit of 1 mu g L-1. Recoveries obtained by analyzing the 6 spiked environmental water samples were between 85.3 and 103.2%.