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Deciphering lead and cadmium stripping peaks for porous antimony deposited electrodes

Aqeel Ahmad Taimoor
Aqeel Ahmad Taimoor
   | 07 juin 2016
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Article Category: Research Article
Publié en ligne: 07 juin 2016
Pages: 233 - 241
Reçu: 18 févr. 2015
Accepté: 01 mai 2016
DOI: https://doi.org/10.1515/msp-2016-0063
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© Wroclaw University of Technology
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Fig. 1

Process flow chart for the preparation of antimony impregnated activated carbon electrode, To and Tf are the initial and final temperatures, respectively.
Process flow chart for the preparation of antimony impregnated activated carbon electrode, To and Tf are the initial and final temperatures, respectively.

Fig. 2

TPR analysis of antimony impregnated activated carbon.
TPR analysis of antimony impregnated activated carbon.

Fig. 3

XPS survey peaks, dark line – activated carbon, shaded line – AIAC.
XPS survey peaks, dark line – activated carbon, shaded line – AIAC.

Fig. 4

Deconvoluted XPS plot for the oxygen and antimony peaks for AIAC.
Deconvoluted XPS plot for the oxygen and antimony peaks for AIAC.

Fig. 5

Deconvoluted XPS peaks for antimony, top – after calcination, middle – after reduction, bottom – after deposition of Cd and Pb for 10 min.
Deconvoluted XPS peaks for antimony, top – after calcination, middle – after reduction, bottom – after deposition of Cd and Pb for 10 min.

Fig. 6

Cyclic voltammetry plot for activated carbon (shaded line ) and AIAC (dark line). Voltage step size = 4 mV/s.
Cyclic voltammetry plot for activated carbon (shaded line ) and AIAC (dark line). Voltage step size = 4 mV/s.

Fig. 7

Square wave stripping voltammetry results for activated carbon - ∆, AIAC- ▫, 100 ppb Pb2+ and Cd solution: 0.01 M HCl (pH 2), deposition at –0.1 V for 10 min at a frequency of 30 Hz, amplitude of 50 mV and a potential step of 4 mV.
Square wave stripping voltammetry results for activated carbon - ∆, AIAC- ▫, 100 ppb Pb2+ and Cd solution: 0.01 M HCl (pH 2), deposition at –0.1 V for 10 min at a frequency of 30 Hz, amplitude of 50 mV and a potential step of 4 mV.

Fig. 8

Successive deposition and anodic stripping of AIAC, (a) actual peaks, (b) peak area (⋄ - lead, ▫ – cadmium and ∆ – shoulder peak); Solution: 0.01 M HCl (pH 2), deposition at –0.1 V for 10 min at a frequency of 30 Hz, amplitude of 50 mV and a potential step of 4 mV.
Successive deposition and anodic stripping of AIAC, (a) actual peaks, (b) peak area (⋄ - lead, ▫ – cadmium and ∆ – shoulder peak); Solution: 0.01 M HCl (pH 2), deposition at –0.1 V for 10 min at a frequency of 30 Hz, amplitude of 50 mV and a potential step of 4 mV.

Fig. 9

Relation between the shoulder peak (≈–0.4 V) area and the amount of antimony present in the sample. Solution: 0.01 M HCl (pH 2), deposition at –0.1 V for 10 min at a frequency of 30 Hz, amplitude of 50 mV and a potential step of 4 mV.
Relation between the shoulder peak (≈–0.4 V) area and the amount of antimony present in the sample. Solution: 0.01 M HCl (pH 2), deposition at –0.1 V for 10 min at a frequency of 30 Hz, amplitude of 50 mV and a potential step of 4 mV.

Fig. 10

Peak area at different analytes concentrations (simulated solutions), ▫– lead, ⋄ – cadmium, ∆ – shoulder peak. Voltammograms are provided in the literature [21].
Peak area at different analytes concentrations (simulated solutions), ▫– lead, ⋄ – cadmium, ∆ – shoulder peak. Voltammograms are provided in the literature [21].
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Langue:
Anglais
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Sujets de la revue:
Materials Sciences, other, Nanomaterials, Functional and Smart Materials, Materials Characterization and Properties
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