Electroactive ion exchange materials (EIXMs) with unique electrochemically switched ion exchange function have been extensively applied in various fields including high value-added ion recovery, toxic ion removal, energy storage devices and electrochemical ion sensors. In particular, the charge and discharge of EIXMs can be electrochemically controlled by an external electric field or by a redox agent while the charge balance is compensated via the ion exchange with electrolyte solution. To date, the discovered EIXMs mainly involve inorganic compounds with mixed-valence transition metals, organic conducting polymers and organic–inorganic hybrid materials. Compared with their bulk forms, nanostructured EIXMs have aroused considerable research interest recently owing to their unique properties such as larger surface area, better ion diffusion path and excellent electron transfer property. In this article, the design principles and synthetic routes for the development of various nanostructured EIXMs and their applications in the fields of selective ion separation, supercapacitors and electrochemical ion sensors are reviewed. In addition, the main challenges and future prospects for the further development of high-performance EIXMs are discussed.

Electroactive ion exchange materials: current status in synthesis, applications and future prospects

Copper nanoparticles/polyaniline/graphene composite as a highly sensitive electrochemical glucose sensor

Three-Dimensional Porous NiO Nanosheets Vertically Grown on Graphite Disks for Enhanced Performance Non-enzymatic Glucose Sensor

A non-enzymatic electrocatalyst, nickel oxide (NiO) nanosheets was developed via a facile hydrothermal approach and further characterized in detail. To harness the potential of NiO nanosheets as a potential electrocatalyst, the hydrothermally synthesized nanosheets were fixed onto the sensor working electrode for glucose sensing application. The NiO nanosheets providing abundance active sites for non-enzymatic glucose detection showed sensitive (1618.4 µA/mMcm2) response in the linear range of 0.25-3.75 mM. The excellent electrocatalytic activity of the NiO modified gold working electrode resulted in a low detection limit (2.5 µM). Moreover, the sensor selectively detected glucose in the solution containing common interferants such as cholesterol, dopamine, uric acid and ascorbic acid, further makes it highly suitable for non-enzymatic glucose detection in near-real samples.

https://iopscience.iop.org/article/10.1149/1945-7111/ab9757/pdf

Hydrothermally Synthesized Nickel Oxide Nanosheets for Non-Enzymatic Electrochemical Glucose Detection

In recent years, experimentation on organic conducting polymers has been escalated and many interested researchers are looking forward to exploring more in the area of optoelectronics. Due to advan...

Functionalization of conducting polymers and their applications in optoelectronics

http://jes.ecsdl.org/content/161/12/B269.full.pdf

Non-Enzymatic Glucose Sensor Based on Nickel Hexacyanoferrate/Polyaniline Hybrids on Graphene Prepared by a One-Step Process

Zinc ions doped poly(aniline-co-m-aminophenol) for high-performance supercapacitor

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Non-Enzymatic Glucose Sensor Based on Nickel Hexacyanoferrate/Polyaniline Hybrids on Graphene Prepared by a One-Step Process

Zinc ions doped poly(aniline-co-m-aminophenol) for high-performance supercapacitor