Electrocatalysis of Lindane Using Antimony Oxide Nanoparticles Based-SWCNT/PANI Nanocomposites

Abstract

This work describes the chemical synthesis of antimony oxide nanoparticles (AONPs), polyaniline (PANI), acid functionalized single-walled carbon nanotubes (fSWCNTs), and the nanocomposite (AONP-PANI-SWCNT) as catalyst for the trace detection of lindane. Successful synthesis of the nanomaterials was confirmed by Fourier transform infrared (FT-IR) spectroscopy, ultraviolet-visible (UV-Vis) spectroscopy, x-ray diffraction (XRD) spectroscopy, and scanning electron microscopy (SEM). Cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) were used for investigating the electrochemical behavior of the modified electrodes in the ferrocyanide/ferricyanide ([Fe(CN)6]4−/[Fe(CN)6]3−) redox probe. GCE-AONP-PANI-SWCNT exhibited faster electron transport properties as well as higher electroactivity as compared to bare-GCE, GCE-AONPs, GCE-PANI, and GCE-SWCNT electrodes. Electrocatalytic studies further showed that GCE-AONP-PANI-SWCNT modified electrode was stable (after 20 scans) with only a small current drop in lindane (0.57%). The GCE-AONP-PANI-SWCNT electrode with low detection limit of 2.01 nM performed better toward the detection of lindane as compared to other studies in literature. The GCE-AONP-PANI-SWCNT electrode is highly selective toward the detection of lindane in the presence of various organic and inorganic interfering species. Real sample analysis of river water and tap water samples using the developed sensor gave satisfactory percentage recoveries therefore confirming the potential of the proposed sensor for practical application.

Electrochemical Detection of Endosulfan Using an AONP-PANI-SWCNT Modified Glassy Carbon Electrode

“…Information on the preparation and characterization of AONPs, PANI, fSWCNTs has been reported in our previous studies [ 39 ].…”

“…The resultant mixture was stirred at room temperature for 48 h to obtain a putty form of AONP-PANI-SWCNTs composite. This nanocomposite was dried overnight at 25 °C in order to evaporate the solvent [ 39 ]. The drop-cast method was used for the modification of the electrode.…”

Nanostructured Carbon-Nitrogen-Sulfur-Nickel Networks Derived From Polyaniline as Bifunctional Catalysts for Water Splitting

“…From this perspective, conducting polymers combined with low loading of metallic species are good candidates for high-performance electrocatalysts due to their interesting structural and physical properties (Ghosh et al, 2015(Ghosh et al, , 2016(Ghosh et al, , 2017Wang et al, 2016a;Ramohlola et al, 2018). Among those polymers, polyaniline (PANI) has received tremendous attention in recent years in (bio)electrochemistry to be directly used as an electrode or indirectly as a supporting material (Wu et al, 2011;Silva et al, 2013;Boeva and Sergeyev, 2014;Xu and Minteer, 2014;Wang et al, 2016a;Cao et al, 2017;Torres et al, 2017;Feng et al, 2018;Masibi et al, 2018;Ramohlola et al, 2018;Shendkar et al, 2018;Bai et al, 2019). Torres and co-workers have shown that upon the introduction of Ni in a PANI-based electrode, the exchange current density (j 0 ) increases from 0.35 to 3.47 µA cm −2 , which indicates that the ability of electron transfer (driving force in electrocatalysis) is about one magnitude higher (Torres et al, 2017).…”

Production of conductive bacterial cellulose-polyaniline membranes in the presence of metal salts

“…40 The absorption peaks at 1612, 1611, 1425, and 1422 cm À1 correspond to the amine and imine groups in BC-PANI and BC-PANI-Cu. [41][42][43][44] The peaks at 1313 and 1290 cm À1 correspond to the protonated state of PANI, 45,46 while the peaks at 861 and 864 cm À1 can be attributed to the head-to-tail coupling of the aniline monomers. 47,48 Thus, the FT-IR analysis confirmed the presence of PANI in the BC-PANI-Cu membrane.…”