Ternary hybrid of polyaniline-alanine-reduced graphene oxide for electrochemical sensing of heavy metal ions

Amino acids (AAs) as a promising class of biocompatible materials have gained tremendous attention in various fields such as nutrition, human health, drug delivery, imaging, and sensing. Polymerization of different AAs by various strategies leads to generation of a large number of poly (amino acids) (PAAs) as a novel and biocompatible polymers, which have a great potential in the application of the bio (sensors). This review provides an overview of the application of PAAs for sensing platforms, and focuses on the critical role of different detection methods like labelled and label-free towards efficient biomedical based on PAAs were discussed. Moreover, some missing gaps and major limitations of the application of these polymers in sensing approaches and real analysis methods are surveyed. This review seeks to highlight the significant advances in functional nanomaterials with PAAs and their application for the bioanalysis of biomarkers, neurotransmitters, water/industry contaminators, pesticide, and ions, followed by prospects and challenges.

Poly (amino acids) towards sensing: Recent progress and challenges

Emerging insights into the use of carbon-based nanomaterials for the electrochemical detection of heavy metal ions

Detection and remediation of pollutants to maintain ecosustainability employing nanotechnology: A review.

The elevated concentrations of various trace metals beyond existing guideline recommendations in water bodies have promoted research on the development of various electrochemical nanosensors for the trace metals’ early detection. Inspired by the exciting physical and chemical properties of nanomaterials, advanced functional nanocomposites with improved sensitivity, sensitivity and stability, amongst other performance parameters, have been synthesized, characterized, and applied on the detection of various trace metals in water matrices. Nanocomposites have been perceived as a solution to address a critical challenge of distinct nanomaterials that are limited by agglomerations, structure stacking leading to aggregations, low conductivity, and limited porous structure for electrolyte access, amongst others. In the past few years, much effort has been dedicated to the development of various nanocomposites such as; electrochemical nanosensors for the detection of trace metals in water matrices. Herein, the recent progress on the development of nanocomposites classified according to their structure as carbon nanocomposites, metallic nanocomposites, and metal oxide/hydroxide nanocomposites is summarized, alongside their application as electrochemical nanosensors for trace metals detection in water matrices. Some perspectives on the development of smart electrochemical nanosensors are also introduced.

https://www.mdpi.com/1424-8220/21/1/131/pdf

Nanocomposites for Electrochemical Sensors and Their Applications on the Detection of Trace Metals in Environmental Water Samples

Ultra-selective detection of Cd2+ and Pb2+ using glycine functionalized reduced graphene oxide/polyaniline nanocomposite electrode

Abstract A glassy carbon electrode (GCE) has been modified by an in situ electrochemical reduction of an aryldiazonium salt generated from the reaction of 4‐aminobenzoic acid and sodium nitrite in acidic ethanolic solution. The as‐prepared phenyl carboxylic acid‐modified glassy carbon electrode has been, for the first time, used for the electrochemical determination of dopamine. Under optimal experimental parameters, outstanding electrocatalytic activity, high sensitivity at a LOD of 5.6×10−9  m, and broad linearity of 0.1 to 1000 μm were obtained. The crafted electrochemical platform demonstrated excellent stability, specificity, and anti‐interference capability towards the sensing of dopamine.

https://onlinelibrary.wiley.com/doi/pdfdirect/10.1002/open.202200233

Amiza Tahir

Papers

Ternary hybrid of polyaniline-alanine-reduced graphene oxide for electrochemical sensing of heavy metal ions

Ultra-selective detection of Cd2+ and Pb2+ using glycine functionalized reduced graphene oxide/polyaniline nanocomposite electrode

Electrochemical Detection of Dopamine using a Phenyl Carboxylic Acid‐Functionalized Electrode Made by Electrochemical Reduction of a Diazonium Salt

l-Cysteine functionalized coral-like Ag doped MnO2 nanostructures for the real-time electrochemical detection of lead and cadmium ions