Polyaniline/Graphitic Carbon Nitride Nanocomposites with Improved Thermoelectric Properties


UĞRAŞKAN V. , KARAMAN F.

JOURNAL OF ELECTRONIC MATERIALS, 2021 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume:
  • Publication Date: 2021
  • Doi Number: 10.1007/s11664-021-08856-1
  • Title of Journal : JOURNAL OF ELECTRONIC MATERIALS
  • Keywords: Polyaniline, graphitic carbon nitride, thermoelectric, composite

Abstract

In this study, we aimed to investigate the effects of graphitic carbon nitride (g-C3N4) on the thermoelectric (TE) properties of camphorsulfonic acid (CSA) doped polyaniline (PANI). For this purpose, g-C3N4 was synthesized at 550 degrees C using guanidine hydrochloride as a precursor. Later, PANI was synthesized by oxidative chemical polymerization and doped with CSA. Finally, PANI-CSA/g-C3N4 composites were prepared by ultrasonic homogenization with different weight ratios of g-C3N4. The composites showed positive Seebeck coefficients which are the characteristics of p-type semiconductors. The Seebeck coefficient of PANI-CSA enhanced from 10 mu V K-1 to 472 mu V K-1 with the incorporation of g-C3N4. Furthermore, the power factor (PF) of the composites reached a maximum at 70.75 mu W m(-1) K-2 which is almost 500 times higher compared to pristine PANI-CSA. This indicates that g-C3N4 is a promising additive to be used in polymer-based TE materials that can be used around room temperature.