Preparation of PEDOT/GO, PEDOT/MnO2, and PEDOT/GO/MnO2 nanocomposites and their application in catalytic degradation of methylene blue

Abstract

The nanocomposite materials of poly(3,4-ethylenedioxythiophene)/graphene oxide (PEDOT/GO), poly(3,4-ethylenedioxythiophene)/MnO 2 (PEDOT/MnO 2 ), and poly(3, 4-ethylenedioxythiophene)/graphene oxide/MnO 2 (PEDOT/GO/MnO 2 ) were successfully prepared by facile and template-free solution method. The structure and morphology of nanonanocomposites were characterized by Fourier transform infrared spectroscopy (FTIR), ultraviolet-visible absorption spectra (UV-vis), field emission scanning electron microscope (FESEM), X-ray diffraction (XRD), and energy-dispersive X-ray spectroscopy (EDX), respectively. The catalytic activities of nanocomposites were investigated through the degradation processes of methylene blue (MB) solution under dark, UV light, and nature sunlight irradiation, respectively. The results displayed that nanocomposites were successfully synthesized, and PEDOT/GO had higher conjugation length and doped degree than pure PEDOT. However, the introduction of MnO 2 could lead to the reduction of conjugation length and doped degree in PEDOT/MnO 2 and PEDOT/GO/MnO 2 nanocomposites. The field emission scanning electron microscope (FESEM) analysis also showed that both MnO 2 and GO had some effect on the morphology of nanocomposites. The catalytic activities of pure PEDOT and nanocomposites were in the order of PEDOT/GO/MnO 2 > PEDOT/MnO 2 > PEDOT/GO > pure PEDOT. Besides, the catalytic results also showed that the highest degradation efficiency of MB after 7 h occurred in the PEDOT/GO/MnO 2 composite in three irradiation.

Electrodeposited MnOx/PEDOT Composite Thin Films for the Oxygen Reduction Reaction

“…Considering the capacitive behavior of both MnO x and PEDOT alone, the two have been combined successfully for electrochemical capacitors 4with synergistic behavior [16][17][18]. MnO x /PEDOT composites have also been used for catalytic degradation of methylene blue19 and oxidation of memantine hydrochloride 20. …”

Graphene/poly(3,4-ethylenedioxythiophene)/Fe3O4 nanocomposite – An efficient oxygen reduction catalyst for the continuous electricity production from wastewater treatment microbial fuel cells

“…The complete reduction of GO and formation of rGO/PEDOT composite were clearly identified through the completely vanished GO peak and the new peak appears at 25.9 , corresponding to the (002) reflection plane of PEDOT (Fig. 3ii(d)) [41]. The observed characteristic reflection planes of rGO/Fe 3 O 4 (Fig.…”