Title: Electrospun nanofibers decorated with bio-sonochemically synthesized gold nanoparticles as an ultrasensitive probe in amalgam-based mercury (II) detection system
Journal: Ultrasonics Sonochemistry
Author: 1. Zohreh Parsaee
Year: 2018
Address: 1. Young Researchers and Elite Club, Bushehr Branch, Islamic Azad University, Bushehr, Iran
Abstract: In this study, bio-ultrasound-assisted synthesized gold nanoparticles using Gracilaria canaliculata algae have been immobilized on a polymeric support and used as a glassy probe chemosensor for detection and rapid removal of Hg2+ ions. The function of the suggested chemosensor has been explained based on gold-amalgam formation and its catalytic role on the reaction of sodium borohydride and rhodamine B (RhB) with fluorescent and colorimetric sensing function. The catalyzed reduction of RhB by the gold amalgam led to a distinguished color change from red and yellow florescence to colorless by converting the amount of Hg2+ deposited on Au-NPs. The detection limit of the colorimetric and fluorescence assays for Hg2+ was 2.21 nM and 1.10 nM respectively. By exposing the mentioned colorless solution to air for at least 2 hours, unexpectedly it was observed that the color and fluorescence of RhB were restored. Have the benefit of the above phenomenon a recyclable and portable glass-based sensor has been provided by immobilizing the Au-NPs and RB on the glass slide using electrospinning. Moreover, the introduced combinatorial membrane has facilitated the detection and removal of Hg2+ ions in various Hg (II)-contaminated real water samples with efficiency of up to 99%.
Keywords: Ultrasound, Gold NPs, Gracilaria canaliculata, Mercury (II), Electrospinning, Chemosensor
Application: Sensor, Nanoparticle
Product Model 1: Electroris
Product Model 2:
URL: #https://www.sciencedirect.com/science/article/pii/S1350417718301792#