Synthesis, characterization and performance of polyaniline-polyoxometalates (XM 12, X = P, Si and M = Mo, W) composites as electrocatalysts of bromates

Grammatiki G. Papagianni, Dimitrios V. Stergiou, Gerasimos S. Armatas, Mercouri G Kanatzidis, Mamas I. Prodromidis

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

Composite materials of the type polyaniline (PANI)-polyoxometalates (POM = XM 12, X = P, Si and M = Mo, W) were synthesized and characterized by means of FT-IR, UV-vis, SEM, XRD, SAXS analysis and cyclic voltammetry. Suspensions of 2.5 mg mL -1 PANI-PMo 12 in 2% (w/v) poly(ethyleneimine) (PEI) in methanol were prepared and deposited onto graphene oxide-modified graphite electrodes. These were tested as sensors for the ability to electrocatalyze the reduction of bromates by using cyclic voltammetry. Various experimental variables such as the loading of the composite material, the concentration of PEI, the pH and the composition of electrolyte, and the electrode material were optimized. By performing DC amperometry at a fixed potential of -0.3 V, versus a Ag/AgCl reference electrode, in 0.05 M HCl, a linear calibration curve over the concentration range 7.5 × 10 -6 to 5.0 × 10 -4 M BrO 3 - was constructed. The 3σ limit of detection and the relative standard deviation of the method were 3.0 × 10 -6 M BrO 3 - and 3% (n = 7, 1 × 10 -4 M BrO 3 -), respectively. The accuracy of the method was established by recovery studies in spiked drinking water and flour extract samples. Recovery was 95.4-100.2%. Finally, the sensors exhibited a remarkable working and storage stability when they kept dry in ambient conditions.

Original languageEnglish
Pages (from-to)346-353
Number of pages8
JournalSensors and Actuators, B: Chemical
Volume173
DOIs
Publication statusPublished - Oct 2012

Fingerprint

Bromates
bromates
electrocatalysts
Electrocatalysts
Polyaniline
Polysilicon
Cyclic voltammetry
recovery
storage stability
flour
Recovery
Graphite electrodes
Electrodes
drinking
composite materials
electrodes
Graphite
sensors
Sensors
Composite materials

Keywords

  • Bromate electrochemical sensors
  • Flour
  • Polyaniline
  • Polyoxometalates (Heteropolyacids)
  • Tap water

ASJC Scopus subject areas

  • Instrumentation
  • Materials Chemistry
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

Cite this

Synthesis, characterization and performance of polyaniline-polyoxometalates (XM 12, X = P, Si and M = Mo, W) composites as electrocatalysts of bromates. / Papagianni, Grammatiki G.; Stergiou, Dimitrios V.; Armatas, Gerasimos S.; Kanatzidis, Mercouri G; Prodromidis, Mamas I.

In: Sensors and Actuators, B: Chemical, Vol. 173, 10.2012, p. 346-353.

Research output: Contribution to journalArticle

@article{b07882f13a954d33b9e5b7f40a9b1737,
title = "Synthesis, characterization and performance of polyaniline-polyoxometalates (XM 12, X = P, Si and M = Mo, W) composites as electrocatalysts of bromates",
abstract = "Composite materials of the type polyaniline (PANI)-polyoxometalates (POM = XM 12, X = P, Si and M = Mo, W) were synthesized and characterized by means of FT-IR, UV-vis, SEM, XRD, SAXS analysis and cyclic voltammetry. Suspensions of 2.5 mg mL -1 PANI-PMo 12 in 2{\%} (w/v) poly(ethyleneimine) (PEI) in methanol were prepared and deposited onto graphene oxide-modified graphite electrodes. These were tested as sensors for the ability to electrocatalyze the reduction of bromates by using cyclic voltammetry. Various experimental variables such as the loading of the composite material, the concentration of PEI, the pH and the composition of electrolyte, and the electrode material were optimized. By performing DC amperometry at a fixed potential of -0.3 V, versus a Ag/AgCl reference electrode, in 0.05 M HCl, a linear calibration curve over the concentration range 7.5 × 10 -6 to 5.0 × 10 -4 M BrO 3 - was constructed. The 3σ limit of detection and the relative standard deviation of the method were 3.0 × 10 -6 M BrO 3 - and 3{\%} (n = 7, 1 × 10 -4 M BrO 3 -), respectively. The accuracy of the method was established by recovery studies in spiked drinking water and flour extract samples. Recovery was 95.4-100.2{\%}. Finally, the sensors exhibited a remarkable working and storage stability when they kept dry in ambient conditions.",
keywords = "Bromate electrochemical sensors, Flour, Polyaniline, Polyoxometalates (Heteropolyacids), Tap water",
author = "Papagianni, {Grammatiki G.} and Stergiou, {Dimitrios V.} and Armatas, {Gerasimos S.} and Kanatzidis, {Mercouri G} and Prodromidis, {Mamas I.}",
year = "2012",
month = "10",
doi = "10.1016/j.snb.2012.07.020",
language = "English",
volume = "173",
pages = "346--353",
journal = "Sensors and Actuators, B: Chemical",
issn = "0925-4005",
publisher = "Elsevier",

}

TY - JOUR

T1 - Synthesis, characterization and performance of polyaniline-polyoxometalates (XM 12, X = P, Si and M = Mo, W) composites as electrocatalysts of bromates

AU - Papagianni, Grammatiki G.

AU - Stergiou, Dimitrios V.

AU - Armatas, Gerasimos S.

AU - Kanatzidis, Mercouri G

AU - Prodromidis, Mamas I.

PY - 2012/10

Y1 - 2012/10

N2 - Composite materials of the type polyaniline (PANI)-polyoxometalates (POM = XM 12, X = P, Si and M = Mo, W) were synthesized and characterized by means of FT-IR, UV-vis, SEM, XRD, SAXS analysis and cyclic voltammetry. Suspensions of 2.5 mg mL -1 PANI-PMo 12 in 2% (w/v) poly(ethyleneimine) (PEI) in methanol were prepared and deposited onto graphene oxide-modified graphite electrodes. These were tested as sensors for the ability to electrocatalyze the reduction of bromates by using cyclic voltammetry. Various experimental variables such as the loading of the composite material, the concentration of PEI, the pH and the composition of electrolyte, and the electrode material were optimized. By performing DC amperometry at a fixed potential of -0.3 V, versus a Ag/AgCl reference electrode, in 0.05 M HCl, a linear calibration curve over the concentration range 7.5 × 10 -6 to 5.0 × 10 -4 M BrO 3 - was constructed. The 3σ limit of detection and the relative standard deviation of the method were 3.0 × 10 -6 M BrO 3 - and 3% (n = 7, 1 × 10 -4 M BrO 3 -), respectively. The accuracy of the method was established by recovery studies in spiked drinking water and flour extract samples. Recovery was 95.4-100.2%. Finally, the sensors exhibited a remarkable working and storage stability when they kept dry in ambient conditions.

AB - Composite materials of the type polyaniline (PANI)-polyoxometalates (POM = XM 12, X = P, Si and M = Mo, W) were synthesized and characterized by means of FT-IR, UV-vis, SEM, XRD, SAXS analysis and cyclic voltammetry. Suspensions of 2.5 mg mL -1 PANI-PMo 12 in 2% (w/v) poly(ethyleneimine) (PEI) in methanol were prepared and deposited onto graphene oxide-modified graphite electrodes. These were tested as sensors for the ability to electrocatalyze the reduction of bromates by using cyclic voltammetry. Various experimental variables such as the loading of the composite material, the concentration of PEI, the pH and the composition of electrolyte, and the electrode material were optimized. By performing DC amperometry at a fixed potential of -0.3 V, versus a Ag/AgCl reference electrode, in 0.05 M HCl, a linear calibration curve over the concentration range 7.5 × 10 -6 to 5.0 × 10 -4 M BrO 3 - was constructed. The 3σ limit of detection and the relative standard deviation of the method were 3.0 × 10 -6 M BrO 3 - and 3% (n = 7, 1 × 10 -4 M BrO 3 -), respectively. The accuracy of the method was established by recovery studies in spiked drinking water and flour extract samples. Recovery was 95.4-100.2%. Finally, the sensors exhibited a remarkable working and storage stability when they kept dry in ambient conditions.

KW - Bromate electrochemical sensors

KW - Flour

KW - Polyaniline

KW - Polyoxometalates (Heteropolyacids)

KW - Tap water

UR - http://www.scopus.com/inward/record.url?scp=84867090601&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84867090601&partnerID=8YFLogxK

U2 - 10.1016/j.snb.2012.07.020

DO - 10.1016/j.snb.2012.07.020

M3 - Article

AN - SCOPUS:84867090601

VL - 173

SP - 346

EP - 353

JO - Sensors and Actuators, B: Chemical

JF - Sensors and Actuators, B: Chemical

SN - 0925-4005

ER -