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

Zhan, Tianrong; Xia, Tian; Ding, Guiyan; Liu, Xien; Wang, Lei; Teng, Hongni

doi:10.1016/j.snb.2018.12.068

Cited by 13 publications

(2 citation statements)

References 49 publications

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“…8,9 Recently, applications of ILs in electrochemistry have attracted increasing attention due to their good ionic conductivity, water miscibility, high thermal stability, large electrochemical window, and excellent catalytic performance. ILs have been used in the fabrication of batteries, 10 capacitors, 11 fuel cells, 12 and electrochemical sensors, 13 the last of which have attracted increasing attention recently. However, in these applications, ILs are only used to disperse nanomaterials for the immobilization of biomolecules.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Benefitting from their unique characteristics such as tunable viscosity and miscibility, low volatility, and high chemical stability, ILs have been widely reported for unique and useful applications in electrochemistry, , analytical chemistry, extraction, separation, synthesis, , and catalysis. , Recently, applications of ILs in electrochemistry have attracted increasing attention due to their good ionic conductivity, water miscibility, high thermal stability, large electrochemical window, and excellent catalytic performance. ILs have been used in the fabrication of batteries, capacitors, fuel cells, and electrochemical sensors, the last of which have attracted increasing attention recently. However, in these applications, ILs are only used to disperse nanomaterials for the immobilization of biomolecules. − Moreover, these ILs are conventional tetrafluoroborate (BF 4 – ) and hexafluorophosphate (PF 6 – ) anions, and their biocompatibility and environmentally friendly property are not satisfactory …”

Section: Introductionmentioning

confidence: 99%

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Amino Acid-Based Imidazole Ionic Liquid: A Novel Soft Matrix for Electrochemical Biosensing Applications

Yao

Lambert

et al. 2021

ACS Sustainable Chem. Eng.

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A new amino acid-based ionic liquid of 1-methyl-3-dodecane imidazolium aspartic acid ([C n mim]Asp IL, n = 4, 6, 8, 12, 14) was reported as a soft matrix to be used as a novel electrochemical glucose biosensor. [C n mim]Asp ILs were synthesized using a simple acid−base titration method and characterized by nuclear magnetic resonance spectroscopy, Fourier transform infrared (FT-IR) spectrum, scanning electron microscopy, negative-staining and cryogenic transmission electron microscopy, electrical conductivity, surface tension, dynamic light scattering, and UV−vis spectrum. [C n mim]Asp ILs possessed excellent conductivity and a large specific surface area, providing a biocompatible microenvironment to promote enzyme-catalyzed direct electron transfer while maintaining surface bioactivity and stability. It was found that the micelle structure could form in the [C 12 mim]Asp IL solution when the concentration was beyond its critical micelle concentration. Glucose oxidase (GOx) could be uniformly dispersed and immobilized onto these micelles of the [C 12 mim]Asp IL soft matrix through a hydrogen bond and physical absorption. Electrochemical experiments demonstrated that [C 12 mim]Asp/GOx/Nafion/GCE achieved the best electrochemical performance toward glucose at a working potential of −0.33 V. The [C 12 mim]Asp-based enzyme sensor displays a linear range response to glucose concentration from 0.001 to 0.58 and 0.58 to 12 mM and a low-end detection limit of 0.572 μM (S/N = 3). Additionally, the present glucose biosensor is robust to interfering molecules and shows acceptable reproducibility and practical application for real samples. The proposed amino acid-based ionic liquid can serve as a versatile and promising soft immobilization matrix for development of excellent biosensor applications.

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