Nanostructured materials for sensing Pb(II) and Cd(II) ions: Manganese oxohydroxide versus carbonized polyanilines?

Abstract

Nanostructured materials including three different carbonized polyanilines and manganese oxyhydroxide were prepared and evaluated as electrode materials for sensing of lead and cadmium ions in aqueous media. Anodic stripping voltammetry results indicated that all prepared materials could be successfully used for determination of these two heavy metal ions. Carbonized polyaniline-based electrodes have higher signal and lower limits of detection (10 -7 М) compared to manganese oxyhydroxide-based electrode. Among the three studied carbonized polyanilines, the one that was derived from polyaniline precursor produced in the presence of 3,5-dinitrosalicylic acid showed the highest electrocatalytic activity towards the lead and cadmium oxidation.

Identification of the Levels of Interference of Ions toward Heavy Metal Detection in Electrochemical Sensors Using the Barrier Width Technique

“…The stripping voltammetry technique has been used to capture cadmium ions as it provides selective detection of cadmium, where in most of the cases, the detection has been performed in acidic buffer solution. [12][13][14][15][16][17][18][19][20][21][22] Chemical functionalities on electrode surfaces have been utilized to attach the functional groups for selective capture of ions. [23][24][25][26][27][28][29] A copolymer of PANI with the linkage of functional groups can be utilized and one such copolymer is that of aniline and N-phenylglycine.…”

“…Selectivity of a sensor with respect to interfering analytes is an important performance parameter. While there are several works on the extent of interference of ions toward detection of cadmium, [12][13][14][15][16][17][18][19][20][21][22] there has been relatively less work on explanation of the interference. Even the explanations have been either based on the reduction of the peak height or change in the sensing signal of the analyte in presence of interfering ions, or through the selectivity coefficients.…”

Glass-like carbon, pyrolytic graphite or nanostructured carbon for electrochemical sensing of bismuth ion?

“…Using c-PANI based electrode for sensors and biosensors has also been recently reported [25][26][27][28][29][30]. Suc-cessful application of c-PANIs both as electrocatalysts support and as electrode materials for sensing of heavy metal ions has been demonstrated in our previous work [31,32]. The present paper examines the possibility of using carbon electrodes, namely, edge plane pyrolytic graphite (EPPG), basal plane pyrolytic graphite (BPPG), glassy carbon (GC) and GC electrode modified with c-PANI for electrochemical determination of bismuth ions by anodic stripping voltammetry with the aim to achieve low detection limits and high sensitivity.…”

12-phosphotungstic Acid Supported on BEA Zeolite Composite with Carbonized Polyaniline for Electroanalytical Sensing of Phenols in Environmental Samples

“…[25][26][27] Generally, c-PANI has wide application in electroanalysis, where it can be used either as metal nanoparticle support or as sensing material itself. 23,24,28,29 Zeolites are crystalline solids with unique microporous structures, which can be tailored changing the Si/Al ratio. Different structures of zeolites lead to different mechanical and chemical properties enabling their widespread applications in chemistry and electrochemistry.…”