Simple One-Step Method to Synthesize Polypyrrole-Indigo Carmine-Silver Nanocomposite

Abstract

A nanocomposite of indigo carmine doped polypyrrole/silver nanoparticles was obtained by a one-step electrochemical process. The nanocomposite was characterized by scanning electron microscopy, infrared spectroscopy, ultraviolet-visible-near infrared spectroscopy, and cyclic voltammetry. The simple one-step process allowed the growth of silver nanoparticles during the polymerization of polypyrrole, resulting in films with electrochromic behavior and improved electroactivity. In addition, polypyrrole chains in the nanocomposite were found to present longer conjugation length than pristine polypyrrole films.

Polypyrrole/Ionic Liquid/Au Nanoparticle Counter-Electrodes for Dye-Sensitized Solar Cells: Improving Charge-Transfer Resistance at the CE/Electrolyte Interface

“…The electrodes synthesized in ionic liquid exhibit a pair of well-defined peaks for I − /I 3 − indicating a good reversibility and catalytic activity. 35 Meanwhile, as scan rate is increased the PPy/LiClO 4 electrode loses reversibility, presenting less-defined peaks and the redox reaction for I 3 − /I 2 couples nearly disappear. This behavior is related to an easier oxidation of iodide than a reduction of iodine on the surface of PPy electrodes.…”

“…30 The dependence of anodic and cathodic peaks of I − /I 3 − on the scan rate was evaluated for all electrodes by plotting the logarithm of the peak current (mA cm −2 ) versus the logarithm of scan rate (mV s −1 ). 35 As described by the Randles-Sevcik equation, the electrochemical behavior of the studied PPy electrodes is governed by diffusion of iodide species inside the PPy chain. As one can observe in Figure 5, the slope of the anodic curve slightly varies from 0.50 to 0.53, which indicates that the synthesized PPy based electrodes possess nearly the same electroactive surface area.…”

O estudo teórico do desempenho dos polímeros condutores dos corantes azoicos na detecção eletroquímica de indigo-carmim

“…Ele é usado, também para a produção de tintas, como contraste em análises médicas e farmacêuticas, como agente redox para a detecção de nitratos e, também, como formador de complexos na detecção de metais pesados como cobre e outros [11,12] para colorir as formulações farmacêuticas e até tecidos. É possível o uso dele como dopante na síntese de polímeros condutores [13,14].…”