Details
| Original language | English |
|---|---|
| Pages (from-to) | 1183-1195 |
| Number of pages | 13 |
| Journal | Journal of Solid State Electrochemistry |
| Volume | 25 |
| Issue number | 4 |
| Early online date | 9 Jan 2021 |
| Publication status | Published - Apr 2021 |
| Externally published | Yes |
Abstract
Pb2+ ions were detected on a carbon paste electrode modified with a geopolymer cement. The X-ray pattern and the infrared spectrum of the geopolymer synthesized from metakaolin and phosphoric acid showed a three-dimensional semi-crystalline structure. The obtained geopolymer cement indicates the formation of a broad hump structure between 17 and 40° (2θ) ascribed to the poly(phospho-siloxo) network. The electroanalysis of Pb2+ ions was done in three steps by stripping voltammetry: accumulation of Pb2+ ions in open circuit at pH 4, detection in NaNO3 medium, and desorption. The peak current of Pb2+ ions obtained after 5-min accumulation on the geopolymer cement–modified carbon paste electrode was found to be four times higher than that from the bare carbon paste electrode. After optimization of some parameters related to the detection process (geopolymer cement content in paste, accumulation time, pH of detection medium, detection medium, electrolysis time, potential electrode), a calibration line was drawn in the concentration range from 0.2 × 10−6 M to 1.4 × 10−6 M. The detection limit obtained from a signal-to-noise ratio equal to 3 is 2.3 × 10−9 M. The interferences of some heavy metal ions, such as Hg2+, Cd2+, and Cu2+, and some inorganic ions Al3+, Fe2+, Zn2+, Na+, K+, Ca2+, Mg2+, Cl−, SO42−, and NO3− on CPE/GP-Dib2 sensor were examined. The results obtained shows that these inorganic ions did not interfere with the determination of Pb2+ ions. It indicated that the prepared sensor possessed high selectivity for Pb2+. [Figure not available: see fulltext.]
Keywords
- Acid medium, Carbon paste electrode, Electroanalysis, Geopolymer cement, Lead ions
ASJC Scopus subject areas
- Materials Science(all)
- General Materials Science
- Physics and Astronomy(all)
- Condensed Matter Physics
- Chemistry(all)
- Electrochemistry
- Engineering(all)
- Electrical and Electronic Engineering
Cite this
- Standard
- Harvard
- Apa
- Vancouver
- BibTeX
- RIS
In: Journal of Solid State Electrochemistry, Vol. 25, No. 4, 04.2021, p. 1183-1195.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Geopolymer cement–modified carbon paste electrode
T2 - application to electroanalysis of traces of lead(II) ions in aqueous solution
AU - Pengou, Martin
AU - Ngassa, Guy Bertrand Piegang
AU - Boutianala, Michèle
AU - Tchakouté, Hervé Kouamo
AU - Nanseu-Njiki, Charles Péguy
AU - Ngameni, Emmanuel
N1 - Publisher Copyright: © 2021, The Author(s), under exclusive licence to Springer-Verlag GmbH, DE part of Springer Nature. Copyright: Copyright 2021 Elsevier B.V., All rights reserved.
PY - 2021/4
Y1 - 2021/4
N2 - Pb2+ ions were detected on a carbon paste electrode modified with a geopolymer cement. The X-ray pattern and the infrared spectrum of the geopolymer synthesized from metakaolin and phosphoric acid showed a three-dimensional semi-crystalline structure. The obtained geopolymer cement indicates the formation of a broad hump structure between 17 and 40° (2θ) ascribed to the poly(phospho-siloxo) network. The electroanalysis of Pb2+ ions was done in three steps by stripping voltammetry: accumulation of Pb2+ ions in open circuit at pH 4, detection in NaNO3 medium, and desorption. The peak current of Pb2+ ions obtained after 5-min accumulation on the geopolymer cement–modified carbon paste electrode was found to be four times higher than that from the bare carbon paste electrode. After optimization of some parameters related to the detection process (geopolymer cement content in paste, accumulation time, pH of detection medium, detection medium, electrolysis time, potential electrode), a calibration line was drawn in the concentration range from 0.2 × 10−6 M to 1.4 × 10−6 M. The detection limit obtained from a signal-to-noise ratio equal to 3 is 2.3 × 10−9 M. The interferences of some heavy metal ions, such as Hg2+, Cd2+, and Cu2+, and some inorganic ions Al3+, Fe2+, Zn2+, Na+, K+, Ca2+, Mg2+, Cl−, SO42−, and NO3− on CPE/GP-Dib2 sensor were examined. The results obtained shows that these inorganic ions did not interfere with the determination of Pb2+ ions. It indicated that the prepared sensor possessed high selectivity for Pb2+. [Figure not available: see fulltext.]
AB - Pb2+ ions were detected on a carbon paste electrode modified with a geopolymer cement. The X-ray pattern and the infrared spectrum of the geopolymer synthesized from metakaolin and phosphoric acid showed a three-dimensional semi-crystalline structure. The obtained geopolymer cement indicates the formation of a broad hump structure between 17 and 40° (2θ) ascribed to the poly(phospho-siloxo) network. The electroanalysis of Pb2+ ions was done in three steps by stripping voltammetry: accumulation of Pb2+ ions in open circuit at pH 4, detection in NaNO3 medium, and desorption. The peak current of Pb2+ ions obtained after 5-min accumulation on the geopolymer cement–modified carbon paste electrode was found to be four times higher than that from the bare carbon paste electrode. After optimization of some parameters related to the detection process (geopolymer cement content in paste, accumulation time, pH of detection medium, detection medium, electrolysis time, potential electrode), a calibration line was drawn in the concentration range from 0.2 × 10−6 M to 1.4 × 10−6 M. The detection limit obtained from a signal-to-noise ratio equal to 3 is 2.3 × 10−9 M. The interferences of some heavy metal ions, such as Hg2+, Cd2+, and Cu2+, and some inorganic ions Al3+, Fe2+, Zn2+, Na+, K+, Ca2+, Mg2+, Cl−, SO42−, and NO3− on CPE/GP-Dib2 sensor were examined. The results obtained shows that these inorganic ions did not interfere with the determination of Pb2+ ions. It indicated that the prepared sensor possessed high selectivity for Pb2+. [Figure not available: see fulltext.]
KW - Acid medium
KW - Carbon paste electrode
KW - Electroanalysis
KW - Geopolymer cement
KW - Lead ions
UR - http://www.scopus.com/inward/record.url?scp=85099295352&partnerID=8YFLogxK
U2 - 10.1007/s10008-021-04897-y
DO - 10.1007/s10008-021-04897-y
M3 - Article
AN - SCOPUS:85099295352
VL - 25
SP - 1183
EP - 1195
JO - Journal of Solid State Electrochemistry
JF - Journal of Solid State Electrochemistry
SN - 1432-8488
IS - 4
ER -