Preparation and characterization of PPy with methyl orange as soft template

Chondroitin sulphate-guided construction of polypyrrole nanoarchitectures

“…According to the XPS and FTIR results, it could be concluded that Py monomers were successfully polymerized into PPy. The peaks at 1035 cm −1 , 854 cm −1 and 601 cm −1 corresponded to the \SO 3 − stretching vibrations [33] could be found in both spectra of CS dopant and PPy/CS, indicating that CS was incorporated into the PPy matrix, which was verified by the XPS results. These results demonstrated that the resulting samples consisted of the PPy doped with CS.…”

“…2c, PPy doped with CS showed the characteristic peaks located at 1538 cm −1 and 1289 cm −1 , which were ascribed to the C\N and C_C vibrations of the Py ring [11,32], respectively. And the peaks at 1085 cm − 1 , 668 cm − 1 and 965 cm −1 , emerged on the spectrum, were attributed to the in-plane vibrations of C\H [33,34]. According to the XPS and FTIR results, it could be concluded that Py monomers were successfully polymerized into PPy.…”

Conducting polypyrrole films as a potential tool for electrochemical treatment of azo dyes in textile wastewaters

“…The FTIR spectrum of a polypyrrole-Acid Red 1 Similar results were observed by Zhang et al [42] and they have assigned these three groups of bands to ring stretching, N H bending of polypyrrole, in-plane and out-of-plane C H bending, respectively. In addition, according to Zhang et al [42] and Li et al [43] the absorption peaks at 898, 1256 cm −1 indicate the coupling of S O with the stretching vibration of the pyrrole ring, and that at 2600 cm −1 corresponds to the stretching vibration mode of methylene groups in the long alkyl chains of Acid Red 1. In comparison, the FTIR spectrum of Acid Red 1 alone in Fig.…”

“…However, this entrapment efficiency of Acid Red 1 then decreased with higher solution pH. Previously, pyrrole was reported to be readily oxidised forming thick, smooth and conducting polypyrrole films in acidic media and almost insulating films under neutral conditions [43]. However, no film formation was observed in alkaline media owing to an inhibited oxidation of pyrrole [46].…”

The composites of silver with globular or nanotubular polypyrrole: The control of silver content

“…The synthesis of PPy nanotubes in the presence of MO has later been reported in literature many times [32,39,[40][41][42][43][44][45]. More general mechanisms of nanotubular formation have recently been proposed [19,34].…”