Open AccessThe importance of doping TiO2 into polypyrrol nanofibers to improve their optical sensitivity
Author(s) -
Omar A. Kareem,
Sabri J. Mohameed,
Isam M. Ibrahim
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/2114/1/012057
Subject(s) - polypyrrole , materials science , nanocomposite , polymerization , chemical engineering , nanofiber , scanning electron microscope , fourier transform infrared spectroscopy , dispersion (optics) , doping , nanotechnology , composite material , polymer , optics , optoelectronics , physics , engineering
In this study Electrochemical polymerization was used to make polypyrrol nanofiber. The in situ chemical oxidative polymerization approach was used to create a nanocomposite of polypyrrole PPy-TiO 2 . To achieve homogeneous dispersion inside the PPy matrix, the TiO 2 was dissolved and ultrasonically dispersed. The surface morphology of polypyrrol and PPy/TiO 2 nanocomposites was studied using field emission scanning electron microscopy (FE-SEM), which revealed of a polypyrrol nanofibre network and showed that the TiO 2 nanoparticles was well incorporated. The produced PPy/TiO 2 nanocomposite was characterized using XRD (X-Ray diffraction) and FT-IR (Fourier Transform Infrared). The formation of TiO 2 nanoparticales on a PPy layer matrix was discovered, as well as homogeneous dispersion of TiO 2 inside the PPy matrix and considerable interaction between PPy and TiO 2 . The produced PPy/TiO 2 nanocomposite sensors’ response was investigated towards of light-power sensitivity. The PPy/TiO 2 synergistic effects improve the light sensitivity qualities of the photodetector. The maximium sensitivity of PPy/TiO 2 was around (188 %) at 20% TiO 2 concentration at a light power of 30 mW for a laser diode 720 nm, while the rise time and fall time was ≈ 2.5sec.