Determination of Cd2+ and Pb2+ Based on Mesoporous Carbon Nitride/Self-Doped Polyaniline Nanofibers and Square Wave Anodic Stripping Voltammetry

Abstract

The fabrication and evaluation of a glassy carbon electrode (GCE) modified with self-doped polyaniline nanofibers (SPAN)/mesoporous carbon nitride (MCN) and bismuth for simultaneous determination of trace Cd2+ and Pb2+ by square wave anodic stripping voltammetry (SWASV) are presented here. The morphology properties of SPAN and MCN were characterized by transmission electron microscopy (TEM), and the electrochemical properties of the fabricated electrode were characterized by cyclic voltammetry (CV). Experimental parameters, such as deposition time, pulse potential, step potential, bismuth concentration and NaCl concentration, were optimized. Under the optimum conditions, the fabricated electrode exhibited linear calibration curves ranging from 5 to 80 nM for Cd2+ and Pb2+. The limits of detection (LOD) were 0.7 nM for Cd2+ and 0.2 nM for Pb2+ (S/N = 3). Additionally, the repeatability, reproducibility, anti-interference ability and application were also investigated, and the proposed electrode exhibited excellent performance. The proposed method could be extended for other heavy metal determination.

Conducting Polymer/Ionic Liquid Composite Modified Carbon Paste Electrode for the Determination of Carbaryl in Real Samples

“…Conducting polymers have occupied an important place in electrodes modification because of their unique properties. Polymers such as polythiophene , polyaniline , polypyrrole are the most studied polymers thanks to their high conductivity, their good stability and their possible application on different fields potential. Similarly, aromatic amine conducting polymers have been widely used for the preparation of polymeric films applied in sensors, batteries, capacitors….…”

Efficient Removal of Lead Ions from Water by a Low-Cost Alginate-Melamine Hybrid Sorbent

“…Lead is a non-essential element of the human body [1]. Lead that enters the human body through the food chain cannot be degraded, and also accumulates in the human body for a long time, thereby causing damage to the intestinal system and nervous system, resulting in a series of physiological diseases such as colic, headache, insomnia and convulsions.…”

Electrochemical Determination of Cd2+ and Pb2+ Using NSAID‐mefenamic Acid Functionalized Mesoporous Carbon Microspheres Modified Glassy Carbon Electrode

“…Several analytical methods have been applied for the detection of heavy metal ions which include spectrophotometric and inductively coupled plasma mass spectroscopy (ICP‐MS) of which atomic absorption spectrometry (AAS) is the most popular method for the detection of various metal ions in solution with accuracy. However, the widespread use of these techniques is limited due to high cost and for routine infield monitoring of samples .…”