Preparation and electrochemical studies of layered PANI/HNb₃O₈ nanocomposite

Abstract

Aniline monomers could be easily inserted into and polymerized within the interlayers of HNb 3 O 8 . The conformation and electrochemical properties of the resulting nanocomoposites were discussed in detail. Two different mechanisms were proposed for the polymerization of monomers within the confined interlayers initiated by chemical oxidants and microwave irradiation, respectively. The analyses of thermogravimetric/differential scanning calorimetric analyses, X-ray diffraction, and Fourier transform infrared spectra indicated that the aromatic rings of the interlayered polyaniline (PANI) could be parallel with or perpendicular to the inorganic slabs, and the interlayered PANI molecules were emeraldine salt and protonated by the protons of layered inorganic acid host. The cyclic voltammetry revealed that the properties of the layered host and the interlayer height have an effect on the redox behavior of the corresponding nanocomposites. Compared with the nanocomposites in which the aromatic rings were parallel with the inorganic slabs, the nanocomposites in which the aromatic rings were perpendicular to the slabs demonstrated a higher conductivity and electrochemical activity.

Nanocomposite of polyaniline and a layered niobate acid host: Synthesis, electrochemical studies, and photocatalytic properties

“…d). It is also possible to notice that the morphology of PANI/HNbO nanocomposite is more similar to that of the layered host HNbO when compared with the aggregated ball‐like morphology of the pure PANI prepared by the same method . This results suggests that the polymerization occures mainly between the inorganic layer, which is consistent with the XRD patterns.…”

“…The second weight loss (ca. 15 wt%) ranging from 100 to about 475°C is ascribed to the elimination of dopant (HCl) from the polymer structure and the dehydration of HNbO . The third weight loss (ca.…”

Z-scheme N-doped K4Nb6O17/g-C3N4 heterojunction with superior visible-light-driven photocatalytic activity for organic pollutant removal and hydrogen production

“…2d. In that of K4Nb6O17, the bands in the range 400-1000 cm −1 were attributed to the vibrations of octahedral NbO6 in K4Nb6O17 [39]. The framework of KCN is similar to that of g-C3N4, indicating that the signals mainly originated from the g-C3N4 formed in the KCN composite.…”

The nanocomposite of polyaniline and nitrogen-doped layered HTiNbO5with excellent visible-light photocatalytic performance

“…4.6 wt%) ranging from 150 to B431 1C is due to the dehydration of HTiNbO 5 and the elimination of the dopant (HCl) from the polymer structure. 27,28 The third weight loss (ca. 6.9 wt%) above 431 1C is assigned to the thermal decomposition of intercalated PANI.…”