Abstract
New types of materials were produced by gradual heating of a conducting polymer, polypyrrole, to elevated temperatures.
Highlights
The present study concerns the gradual conversion of polypyrrole to nitrogen-containing carbons and its impact on the adsorption of organic dyes
The carbonized polypyrrole nanotubes offer an alternative to multiwalled carbon nanotubes from the morphological point of view but their structure and properties are different. They are suitable for energy-storage devices, such as electrochemical capacitors[22,23] or as electrocatalysts of oxygen reduction reaction,[24,25] and in the catalysis of organic transformations,[17] where the combination of conductivity and electroactivity with a high specific surface area is of benefit
The ordinary globular morphology transforms to one-dimensional nanofibers or nanotubes when the oxidation of pyrrole takes place in the presence of various organic dyes[35] (Fig. 3, left), such as methyl orange[10,17,36] or Acid Blue 2533 used in the present study
Summary
The present study concerns the gradual conversion of polypyrrole to nitrogen-containing carbons and its impact on the adsorption of organic dyes. The carbonized polypyrrole nanotubes offer an alternative to multiwalled carbon nanotubes from the morphological point of view but their structure and properties are different They are suitable for energy-storage devices, such as electrochemical capacitors[22,23] or as electrocatalysts of oxygen reduction reaction,[24,25] and in the catalysis of organic transformations,[17] where the combination of conductivity and electroactivity with a high specific surface area is of benefit. The present study merges the two research strategies outlined above: (1) the preparation of polypyrrole with a controlled nanostructure and (2) its gradual conversion to nitrogen-containing carbonaceous materials followed by testing in the adsorption of organic dye. Attention has especially been paid to the relation between the polypyrrole morphology and dye adsorption performance
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