Camphor Sulfonic Acid Doped Polyaniline-Titanium Dioxide Nanocomposite: Synthesis, Structural, Morphological, and Electrical Properties

Abstract

A nanocomposite of polyaniline-titanium dioxide (PANi-TiO 2 , 50 wt%) was doped with camphor sulfonic acid (CSA) by solid state reaction with increasing CSA content up to 50 wt% in a smooth agate mortar. CSA doped PANi-TiO 2 was dissolved in m-cresol and films were cast using a spin-coating technique. The doping effect of CSA on PANi-TiO 2 nanocomposite was characterized and evaluated by X-ray diffraction pattern (XRD), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), and electrical conductivity measurement. The XRD spectra showed that the addition of CSA has no effect on crystallinity of PANi-TiO 2 . SEM studies revealed that CSA has a strong effect on morphology of PANi-TiO 2 . The FTIR spectra revealed the interaction between CSA and PANi-TiO 2 nanocomposite. Electrical conductivity measurements indicated that with the increasing content of CSA, the conductivity shows an orderly increase.

Measurement on the structural, morphological, electrical and optical properties of PANI-CSA nanofilms

“…This crystalline nature was only due to the higher CSA dopant ratio (1:8) which was confirmed from the PANI-CSA films below with lower CSA ratios, which showed amorphous nature. The peaks at 2θ = 10.5˚, 15.3˚, and 21˚ (d = 8.44, 5.78 and 4.2 Å respectively) corresponds to PANI [35,36] and the peaks at 18˚ and 19˚ (d = 4.9, and 4.64 Å respectively) corresponds to CSA dopant [37]. So, to obtain high crystalline PANI-CSA films, ratio of CSA have to be increased further which impart crystallinity to PANI polymer films.…”

Polyacrylonitrile-polyaniline composite nanofiber webs: Effects of solvents, redoping process and dispersion technique

“…Also a shoulder observed at around 3280 cm -1 showed the aromatic C-H strecthing of polyaniline [44]. The peak at 1737 cm -1 showed the presence of CSA in the composite nanofiber structure [15].…”

“…Acid dopants which are usually used for doping PANI are smaller molecular organic and inorganic acids and these can have a big disadvantage such as evaporation at room temperature, causing a conductivity depression of the acid doped PANI. To overcome this drawback, nonvolatile acid dopants such as camphorsulfonic acid (CSA) and dodecylbenzylsulfonic acid are widely used in many studies [14][15][16][17] related with polyaniline.…”

A New Catechol Biosensor Immobilized Polyphenol Oxidase by Combining Electropolymerization and Cross-Linking Process

“…Polyaniline (PANI) film can be used as a potential matrix material for immobilizing enzymes due to its outstanding properties, such as low cost of the monomer (aniline), high conductivity, doping and dedoping reversibility, and excellent environmental and thermal stability [16,17]. It is demonstrated that PANI is biocompatible in vitro and in long-term animal studies in vivo.…”