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Electrospun nanofibers decorated with bio-sonochemically synthesized gold nanoparticles as an ultrasensitive probe in amalgam-based mercury (II) detection system.
Parsaee, Zohreh.
Afiliação
  • Parsaee Z; Young Researchers and Elite Club, Bushehr Branch, Islamic Azad University, Bushehr, Iran. Electronic address: zohrehparsaee@mehr.pgu.ac.ir.
Ultrason Sonochem ; 44: 24-35, 2018 Jun.
Article em En | MEDLINE | ID: mdl-29680608
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 h, 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%.
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Texto completo: 1 Base de dados: MEDLINE Assunto principal: Sonicação / Sondas Moleculares / Amálgama Dentário / Nanopartículas Metálicas / Técnicas Eletroquímicas / Nanofibras / Ouro / Mercúrio Idioma: En Ano de publicação: 2018 Tipo de documento: Article

Texto completo: 1 Base de dados: MEDLINE Assunto principal: Sonicação / Sondas Moleculares / Amálgama Dentário / Nanopartículas Metálicas / Técnicas Eletroquímicas / Nanofibras / Ouro / Mercúrio Idioma: En Ano de publicação: 2018 Tipo de documento: Article