Pre-Adsorbed Methylene blue at Carbon-Modified TiO2 Electrode

Application for Lead Sensing in Water

Khadijeh Nekoueian, Shila Jafari, Mandana Amiri, Mika Sillanpaa

Research output: Contribution to journalArticleScientificpeer-review

Abstract

Carbon modified titanium dioxide nanostructured (CMTN) was successfully fabricated by ethanol carbonization method and applied to modify the surface of glassy carbon electrode. This modified electrode was employed in the extraction and the electrochemical determination of methylene blue. The considerable increment in the voltammetric signal for preadsorbed methylene blue compared with those for solution, demonstrated a strong tendency of methylene blue to CMTN which was rooted in porous structure of CMTN and the electrostatic interaction between cationic methylene blue with negative surface of the CMTN. By applying differential pulse voltammetry, a calibration curve is obtained for methylene blue in the range of 1.0 × 10-8 to 1.0 × 10-5 M and the limit of detection was evaluated to be 3.0× 10-9 M. In addition, the pre-adsorbed methylene blue on the surface of the modified electrode performed well in the determination of the trace amounts of lead in the real samples such as lake and tap water. Dynamic linear range for lead was investigated in the range of 1.0 × 10-7 to 5.0 × 10-4 M and the limit of detection was calculated to be 3.0× 10-8 M.
Original languageEnglish
Article number8469033
Pages (from-to)9477-9485
Number of pages9
JournalIEEE Sensors Journal
Volume18
Issue number23
DOIs
Publication statusPublished - 1 Dec 2018
MoE publication typeA1 Journal article-refereed

Fingerprint

methylene blue
Titanium dioxide
Lead
titanium oxides
Electrodes
Carbon
electrodes
carbon
water
Water
Glassy carbon
Carbonization
Voltammetry
Coulomb interactions
Lakes
Ethanol
carbonization
glassy carbon
taps
Calibration

Keywords

  • aromatic compounds
  • carbonization
  • dyes
  • chemical detection
  • differential pulse voltammetry

Cite this

Nekoueian, Khadijeh ; Jafari, Shila ; Amiri, Mandana ; Sillanpaa, Mika. / Pre-Adsorbed Methylene blue at Carbon-Modified TiO2 Electrode : Application for Lead Sensing in Water. In: IEEE Sensors Journal. 2018 ; Vol. 18, No. 23. pp. 9477-9485.
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abstract = "Carbon modified titanium dioxide nanostructured (CMTN) was successfully fabricated by ethanol carbonization method and applied to modify the surface of glassy carbon electrode. This modified electrode was employed in the extraction and the electrochemical determination of methylene blue. The considerable increment in the voltammetric signal for preadsorbed methylene blue compared with those for solution, demonstrated a strong tendency of methylene blue to CMTN which was rooted in porous structure of CMTN and the electrostatic interaction between cationic methylene blue with negative surface of the CMTN. By applying differential pulse voltammetry, a calibration curve is obtained for methylene blue in the range of 1.0 × 10-8 to 1.0 × 10-5 M and the limit of detection was evaluated to be 3.0× 10-9 M. In addition, the pre-adsorbed methylene blue on the surface of the modified electrode performed well in the determination of the trace amounts of lead in the real samples such as lake and tap water. Dynamic linear range for lead was investigated in the range of 1.0 × 10-7 to 5.0 × 10-4 M and the limit of detection was calculated to be 3.0× 10-8 M.",
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Pre-Adsorbed Methylene blue at Carbon-Modified TiO2 Electrode : Application for Lead Sensing in Water. / Nekoueian, Khadijeh; Jafari, Shila; Amiri, Mandana; Sillanpaa, Mika.

In: IEEE Sensors Journal, Vol. 18, No. 23, 8469033, 01.12.2018, p. 9477-9485.

Research output: Contribution to journalArticleScientificpeer-review

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AU - Amiri, Mandana

AU - Sillanpaa, Mika

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