Quaternarization strategy to ultrathin lamellar graphitic C3N4 ionic liquid nanostructure for enhanced electrochemical 2,4-Dichlorophenol sensing

[Display omitted] •A facile quaternarization strategy to a g-C3N4 ionic liquid nanostructure was developed.•Quaternarization involved a nucleophilic substitution of the tri-s-triazine subunits by n-BuBr.•The IL nanostructure improved the conductivity, dispersibility and stability of IL-CNNS dispersi...

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Bibliographic Details
Published in:Sensors and actuators. B, Chemical Chemical, 2019-03, Vol.283, p.463-471
Main Authors: Zhan, Tianrong, Tian, Xia, Ding, Guiyan, Liu, Xien, Wang, Lei, Teng, Hongni
Format: Article
Language:English
Subjects:
2,4-Dichlorophenol
Carbon nitride
Electrical measurement
Electrochemical sensor
Electron transfer
Fourier transforms
Ionic liquid nanostructure
Ionic liquids
Ions
Nanostructure
Quaternarization
Strategy
Ultrathin g-C3N4 nanosheets
X ray photoelectron spectroscopy
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Summary:[Display omitted] •A facile quaternarization strategy to a g-C3N4 ionic liquid nanostructure was developed.•Quaternarization involved a nucleophilic substitution of the tri-s-triazine subunits by n-BuBr.•The IL nanostructure improved the conductivity, dispersibility and stability of IL-CNNS dispersion.•IL-CNNS/GCE displayed a fast electron transfer and the better catalytic activity to 2,4-DCP. We have developed a facile quaternarization strategy to an ultrathin lamellar g-C3N4 ionic liquid nanostructure (IL-CNNS) via a nucleophilic substitution between the tertiary amino groups in tri-s-triazine subunits and n-butyl bromide. After functionalization, the obtained IL-CNNS composite exhibits the enhanced conductivity, dispersibility and stability owing to the formation of IL structure. This composite has been characterized by several spectroscopic techniques (FT-IR, XRD, XPS, TGA and TEM). The IL-CNNS modified electrode displays the larger effective surface area and the faster electron transfer rate, hence resulting in the superior electrocatalytic activity toward 2,4-Dichlorophenol (2,4-DCP). Under the optimal conditions, the proposed 2,4-DCP sensor gives rise to the wide linear range from 0.02 to 160 μM with a low detection limit (6.21 nM, S/N = 3) by amperometric method. The developed sensor has been applied to detect 2,4-DCP in water samples with satisfactory recoveries and stability. This quaternarization strategy may open up a new avenue to fabricate the layered carbon nitride IL nanostructure for electrochemical sensing applications.
ISSN:0925-4005
1873-3077
DOI:10.1016/j.snb.2018.12.068