Modified carbon fabric electrodes: preparation and electrochemical behavior toward amaranth electrolysis

Abstract

The electrochemical behavior of non-modified, Pt-modified, and Pt/polyaniline-modified carbon fiber textile electrodes was studied through a series of electrolyses, under potentiostatic conditions, on an amaranth/sulfuric solution in the presence or absence of chloride ion. The morphology of the dispersed Pt, PANI, and PANI/Pt coatings was analyzed by scanning electron microscopy. Scanning electrochemical microscopy confirmed that the textile surface was effectively modified by the electrocatalytic material. Color removal reached values above 90 % in both electroreduction and electrooxidation processes. The amaranth electroreductions carried out with the nonmodified electrode showed better charge efficiency than those with the Pt-modified textile electrode. The electrooxidations with Pt-modified textile electrodes showed a significant reduction in electrolysis time. Ultraviolet-visible and Fourier transform infrared with attenuated total reflection spectra enabled the electrochemical behavior of the non-modified and Pt/PANI-modified electrodes to be distinguished.

Sonoelectrochemical and Electrochemical Synthesis of Polypyrrole Films on St‐12 Steel and Their Corrosion and Morphological Studies

“…Valuable information can be extracted from the Warburg element, which is always attributed to the mass transport due to diffusion. The W‐T component was evaluated from the following the equation: where l is the length of diffusion layer and D is the binary electron‐ion diffusion coefficient.…”

“…The W-T component was evaluated from the following the equation: 34,35 where l is the length of diffusion layer and D is the binary electron-ion diffusion coefficient. The W-T component was evaluated from the following the equation: 34,35 where l is the length of diffusion layer and D is the binary electron-ion diffusion coefficient.…”

Electrochemical Treatment of Solutions Containing a Recalcitrant Dye: A Way of Using Dimensionally Adaptable Catalytic Fabrics

“…To discard the presence of impurities on the surface of the fabric, a previous analysis (not included) by FT-IR-ATR was carried out. The technical characteristics of the activated carbon textiles are reported in Table . , The ACT electrodes were prepared with strips of 1 cm × 2 cm area cut from the textile. To ensure a proper electric contact between the textile samples and the 2 mm copper rods used as a support, they were glued (the tip was flattened to improve the electrical contact) using CircuitWorks conductive epoxy resin by Chemtronics.…”