Construction of iron porphyrin/titanoniobate nanosheet sensors for the sensitive detection of nitrite

Construction of iron porphyrin/titanoniobate nanosheet sensors for the sensitive detection of... The single-layered well-dispersed HTi2NbO7 nanosheets (NSs) with the thickness of ~ 1.08 nm were obtained by a simple exfoliation method. The electrochemical sensors based on HTi2NbO7 NSs and 5,10,15,20-tetrakis (N-methylpyridinium-4-yl) porphyrinato iron(III) (FeTMPyP) for sensitive detection of nitrite were then fabricated through the self-assembly technique, which was certified by Zeta potential analysis. The prepared samples were fully characterized by X-ray diffraction, X-ray energy dispersive spectrometer, scanning electron microscope, atomic force microscope, high-resolution transmission electron microscope, Fourier transform infrared and ultraviolet–visible spectrum. Electrochemical measurements demonstrated that FeTMPyP/HTi2NbO7 NSs nanocomposites exhibited enhanced electrocatalytic activities toward the oxidation of nitrite due to increased electron-transport properties. The oxidation peak current of nitrite was linearly associated with its concentration in the range from 0.0999 to 3.15 mmol L−1, with the detection limit of 3.15 × 10−5 mol L−1 (S/N = 3). The possible mechanism for nitrite oxidation on the surface of modified electrode was proposed. This study indicated that this biosensor has satisfactory stability, and detects nitrite in wastewater with strong anti-interference performance and good recovery. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Materials Science Springer Journals

Construction of iron porphyrin/titanoniobate nanosheet sensors for the sensitive detection of nitrite

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Publisher
Springer US
Copyright
Copyright © 2018 by Springer Science+Business Media, LLC, part of Springer Nature
Subject
Materials Science; Materials Science, general; Characterization and Evaluation of Materials; Polymer Sciences; Continuum Mechanics and Mechanics of Materials; Crystallography and Scattering Methods; Classical Mechanics
ISSN
0022-2461
eISSN
1573-4803
D.O.I.
10.1007/s10853-018-2423-0
Publisher site
See Article on Publisher Site

Abstract

The single-layered well-dispersed HTi2NbO7 nanosheets (NSs) with the thickness of ~ 1.08 nm were obtained by a simple exfoliation method. The electrochemical sensors based on HTi2NbO7 NSs and 5,10,15,20-tetrakis (N-methylpyridinium-4-yl) porphyrinato iron(III) (FeTMPyP) for sensitive detection of nitrite were then fabricated through the self-assembly technique, which was certified by Zeta potential analysis. The prepared samples were fully characterized by X-ray diffraction, X-ray energy dispersive spectrometer, scanning electron microscope, atomic force microscope, high-resolution transmission electron microscope, Fourier transform infrared and ultraviolet–visible spectrum. Electrochemical measurements demonstrated that FeTMPyP/HTi2NbO7 NSs nanocomposites exhibited enhanced electrocatalytic activities toward the oxidation of nitrite due to increased electron-transport properties. The oxidation peak current of nitrite was linearly associated with its concentration in the range from 0.0999 to 3.15 mmol L−1, with the detection limit of 3.15 × 10−5 mol L−1 (S/N = 3). The possible mechanism for nitrite oxidation on the surface of modified electrode was proposed. This study indicated that this biosensor has satisfactory stability, and detects nitrite in wastewater with strong anti-interference performance and good recovery.

Journal

Journal of Materials ScienceSpringer Journals

Published: May 16, 2018

References

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