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Extraction and determination of trace amounts of gold(III), palladium(II), platinum(II) and silver(I) with the aid of a magnetic nanosorbent made from Fe3O4-decorated and silica-coated graphene oxide modified with a polypyrrole-polythiophene copolymer

Mikrochimica acta (1966), 2017-07, Vol.184 (7), p.2191-2200 [Peer Reviewed Journal]

Springer-Verlag Wien 2017 ;Copyright Springer Science & Business Media 2017 ;Microchimica Acta is a copyright of Springer, (2017). All Rights Reserved. ;ISSN: 0026-3672 ;EISSN: 1436-5073 ;DOI: 10.1007/s00604-017-2170-y

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Title:
Extraction and determination of trace amounts of gold(III), palladium(II), platinum(II) and silver(I) with the aid of a magnetic nanosorbent made from Fe3O4-decorated and silica-coated graphene oxide modified with a polypyrrole-polythiophene copolymer
Author: Jalilian, Niloofar ; Ebrahimzadeh, Homeira ; Asgharinezhad, Ali Akbar ; Molaei, Karam
Subjects: Analytical Chemistry ; Characterization and Evaluation of Materials ; Chemical synthesis ; Chemistry ; Chemistry and Materials Science ; Copolymers ; Electron microscopes ; Electron microscopy ; Electroplating ; Elution ; Functional groups ; Gold ; Graphene ; Iron oxides ; Magnetic measurement ; Microengineering ; Microscopy ; Nanochemistry ; Nanocomposites ; Nanoparticles ; Nanotechnology ; Noble metals ; Original Paper ; Palladium ; Platinum ; Polypyrroles ; Polythiophene ; Scanning electron microscopy ; Seawater ; Sheets ; Silicon dioxide ; Silver ; Solid phases ; Sorbents ; Thermogravimetric analysis ; Wastewater
Is Part Of: Mikrochimica acta (1966), 2017-07, Vol.184 (7), p.2191-2200
Description: The authors describe the synthesis of a nanosorbent for fast magnetic solid phase extraction of trace levels of Ag(I), Au(III), Pd(II) and Pt(II). It consists of graphene oxide sheets modified with magnetite nanoparticles (mGO) coated with silica. This material was further modified with a polypyrrole-polythiophene copolymer via oxidative polymerization to end up with a material of the type mGO@SiO 2 @PPy-PTh. Successful synthesis of the nanocomposite and its components was corroborated by FT-IR, scanning electron microscopy, transmission electron microscopy, vibrating sample magnetometry and thermogravimetric analysis. The presence of nitrogen- and sulfur-containing functional groups on both sides of the nanocomposite sheets facilitates the formation of strong complexes between target (i.e. noble metal ions) and the surface of the sorbent. Following elution with thiourea-HCl, the ions were quantified by FAAS. Under optimized conditions, the lower limits of detection range from 0.1 to 1.0 μg L −1 . The maximum sorption capacities are 49, 50, 45, and 50 mg g −1 for Ag(I), Au(III), Pd(II) and Pt(II), respectively. The method was successfully applied to the extraction and determination of the analytes in wastewater (electroplating, radiological and photographical wastewater), sea water, and road dust. Graphical abstract A sorbent of the type mGO@SiO 2 @PPy-PTh (where mGO stands for magnetic graphene oxide, PPy for polypyrrole, and PTh for polythiophene) was synthesized and used as a nanosorbent for the micro solid phase extraction of the ions Ag(I), Au(III), Pd(II), and Pt(II) prior to their determination by FAAS. mGO: Magnetic graphene oxide. TEOS: Tetraethyl orthosilicate. PPy-PTh: Polypyrrole-Polythiophene copolymer.
Publisher: Vienna: Springer Vienna
Language: English
Identifier: ISSN: 0026-3672
EISSN: 1436-5073
DOI: 10.1007/s00604-017-2170-y
Source: ProQuest Central

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Extraction and determination of trace amounts of gold(III), palladium(II), platinum(II) and silver(I) with the aid of a magnetic nanosorbent made from Fe3O4-decorated and silica-coated graphene oxide modified with a polypyrrole-polythiophene copolymer

Springer-Verlag Wien 2017 ;Copyright Springer Science & Business Media 2017 ;Microchimica Acta is a copyright of Springer, (2017). All Rights Reserved. ;ISSN: 0026-3672 ;EISSN: 1436-5073 ;DOI: 10.1007/s00604-017-2170-y

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