Effective move of Polypyrrole/TiO2 hybrid nanocomposites on removal of methylene blue dye by photocatalytic activity

Abstract

Polypyrrole (PPy) was synthesized effectively by chemical oxidative polymerization of pyrrole. Organic-inorganic hybrid materials PPy-TiO₂ with different PPy weight percents were prepared by mechanical mixing, by using titanium oxide nanoparticles. The characterizations of PPy-TiO₂ hybrid nanocomposites were analyzed by FTIR, UV–Vis, XRD, TGA & DSC and SEM & EDAX. Fourier transform infrared (FTIR) spectra and X-ray diffraction (XRD) were used to distinguish the structure of the attained PPy-TiO₂ hybrid nanocomposites. UV–vis techniques are proved the polymerization of pyrrole monomer and the strong interaction between PPy and TiO₂ nanoparticles. Thermogravimetric analyzer (TGA-DSC) curves revealed that TiO₂ can decrease the weight loss of nanocomposite and increase the thermal stability of synthesized nanocomposites. The residual mass of the pure Pyy-36.51 %, PPy-TiO₂ (25 %)-64.82 %, PPy-TiO₂ (50 %)-60.82 %, PPy-TiO₂ (75 %)-70.50 % and pure TiO₂- 96.69 % nanocomposites at the residual temperature 497.80 °C. The morphology and molecular structure of the hybrid nanocomposite were characterized by scanning electron microscope & Energy dispersive X-ray analysis spectroscopy (SEM & EDAX). These characterization results confirmed the polymerization of pyrrole and the strong interaction between PPy and TiO₂. The material with outstanding absorption capability that meet in optical application is the challenging way, thus the photocatalytic analysis of PPy-TiO₂ hybrid nanocomposites is merely a admissible results. It is notably the favorable degradation efficiency of pure PPy, the PPy+TiO₂ (25 % 50 % & 75 %) nanocomposites are 82 %, 66 %, 67 % and 53 % respectively.