Development of ultrasensitive surfactants doped poly(3,4-ethylenedioxythiophene)/multiwalled carbon nanotube sensor for the detection of pyrethroids and an organochlorine pesticide

Abstract

Fabrication of nano size poly(3,4-ethylenedioxythiophene)/multiwalled carbonnanotubes film on a glassy carbon electrode (PEDOT/MWCNT/GCE) in the presence of anionic and cationic surfactants is reported. The modified composite electrodes were characterized by scanning electron microscopy (SEM) and X-ray diffraction (XRD) studies. SEM studies confirmed the formation of nano size film on the working electrode. Electroanalytical studies were carried out using the above prepared electrode by cyclic voltammetry (CV) and differential pulse stripping voltammetry (DPSV). This electrode exhibited higher sensitivity towards the reduction of cypermethrin (CYP), deltamethrin (DEL), fenvalerate (FEN) falling under pyrethroids family and an organochlorine pesticide dicofol (DCF). In CV, all the selected pesticides were found to exhibit one well-defined irreversible reduction peak at pH 13. Optimum conditions for DPSV were experimentally determined by varying several parameters. The practical application of the newly developed sensor was affirmed by quantification of the selected pesticides in spiked water samples.

Synergistic effect of organic clay fillers based on cetyltrimethylammonium bromide in the synthesis of poly (3,4-ethylenedioxythiophene) nanocomposites

“…A second mass loss at 305°C corresponds to the degradation of the chains of the poly(3,4-ethylenedioxythiophene) network. 36 We can observe for all the samples of the nanocomposite polymer PEDOT/Mag-CTA, at the temperature of 100°C, a weight loss of 2 to 3wt% of the initial mass; this decomposition is assigned to the evaporation of hygroscopic water. The main mass losses in nanocomposites correspond to the decomposition of the PEDOT matrix of which, the temperatures of the 3rd palier are much higher than those of pure PEDOT, whose decomposition starts around 150°C.…”

Nitrite Oxidation with Copper–Cobalt Nanoparticles on Carbon Nanotubes Doped Conducting Polymer PEDOT Composite

“…Poly(3,4-ethylenedioxythiophene) (PEDOT), at ype of conductingp olymer,h as been considered as the most promising one because its well-definedc hemical structure offerso utstanding stabilitya nd conductivity. [24,25] Previous work showed that the electrical properties of electrodes coated with PEDOT [26,27] can be greatly improved. CNTsd oped with PEDOT can significantly increaset he mechanical properties of the polymer,a nd improve the electrical properties by facilitating the charge-transferp rocess between these two components, and thusc atalyzer elatedr eactions.…”

“…As another kind of widely used material, conducting polymers have also been used extensively in the development of sensors because of their interesting electrical, optical, and electrocatalytic properties. Poly(3,4‐ethylenedioxythiophene) (PEDOT), a type of conducting polymer, has been considered as the most promising one because its well‐defined chemical structure offers outstanding stability and conductivity . Previous work showed that the electrical properties of electrodes coated with PEDOT can be greatly improved.…”