Conductive electrospun composite fibers based on solid-state polymerized Poly(3,4-ethylenedioxythiophene) for simultaneous electrochemical detection of metal ions

Umphan Ngoensawat; Thanarath Pisuchpen; Yongsak Sritana-Anant; Nadnudda Rodthongkum; Voravee P Hoven

doi:10.1016/j.talanta.2022.123253

Conductive electrospun composite fibers based on solid-state polymerized Poly(3,4-ethylenedioxythiophene) for simultaneous electrochemical detection of metal ions

Talanta. 2022 May 1:241:123253. doi: 10.1016/j.talanta.2022.123253. Epub 2022 Jan 21.

Authors

Umphan Ngoensawat¹, Thanarath Pisuchpen¹, Yongsak Sritana-Anant¹, Nadnudda Rodthongkum², Voravee P Hoven³

Affiliations

¹ Department of Chemistry, Faculty of Science, Chulalongkorn University, Phayathai Road, Pathumwan, Bangkok, 10330, Thailand.
² Metallurgy and Materials Science Research Institute, Chulalongkorn University, Phayathai Road, Pathumwan, Bangkok, 10330, Thailand; Nanotec-CU Center of Excellence on Food and Agriculture, Department of Chemistry, Faculty of Science, Chulalongkorn University, Phayathai Road, Pathumwan, Bangkok, 10330, Thailand; Center of Excellence in Responsive Wearable Materials, Chulalongkorn University, Phayathai Road, Pathumwan, Bangkok, 10330, Thailand.
³ Department of Chemistry, Faculty of Science, Chulalongkorn University, Phayathai Road, Pathumwan, Bangkok, 10330, Thailand; Nanotec-CU Center of Excellence on Food and Agriculture, Department of Chemistry, Faculty of Science, Chulalongkorn University, Phayathai Road, Pathumwan, Bangkok, 10330, Thailand; Center of Excellence in Materials and Biointerfaces, Chulalongkorn University, Phayathai Road, Pathumwan, Bangkok, 10330, Thailand. Electronic address: vipavee.p@chula.ac.th.

PMID: 35121539
DOI: 10.1016/j.talanta.2022.123253

Abstract

Conductive composite fibers containing poly (3,4-ethylenedioxythiophene) (PEDOT) and silver nanoparticles (AgNPs) were fabricated by emulsion electrospinning of 2,5-dibromo-3,4-ethylenedioxythiophene (DBEDOT) in toluene together with aqueous solution of poly (vinyl alcohol) (PVA) and silver nanoparticles (AgNPs) in the presence of sodium dodecylsulfate followed by heat treatment at 70 °C to convert DBEDOT to conductive PEDOT via solid state polymerization (SSP). The composite fibers were characterized by scanning electron microscopy, transmission electron microscopy, x-ray photoelectron spectroscopy and thermogravimetric analysis. The PEDOT/PVA/AgNPs composite fibers deposited on a screen-printed carbon electrode (SPCE) surface exhibited good electrochemical response and was applied for simultaneous detection of heavy metal ions in a mixture, namely Zn(II), Cd(II), and Pb(II) via square wave anodic stripping voltammetry (SWASV). With added Bi⁺³ into the detection system, the bismuth film formed on the electrode allows effective alloy formation with the deposited heavy metals obtained upon reduction of the heavy metal ions, the detection of heavy metal ions after stripping was successfully accomplished with a linear range of 10-80 ppb and limits of detections (LOD) of 6, 3 and 8 ppb for Zn(II), Cd(II), and Pb(II), respectively.

Keywords: Electrospinning; Metal ion detection; PEDOT; PVA; Solid state polymerization.

MeSH terms

Bridged Bicyclo Compounds, Heterocyclic
Ions
Metal Nanoparticles*
Polymerization
Polymers
Silver

Substances

Bridged Bicyclo Compounds, Heterocyclic
Ions
Polymers
poly(3,4-ethylene dioxythiophene)
Silver