Room temperature operating sensitive and reproducible ammonia sensor based on PANl/hematite nanocomposite

摘要

A facile, ultra-sensitive, quickly recoverable, and room temperature operating ammonia sensor was developed by using polyaniline (PANI) and hematite (a-Fe2O3) hybrid nanocomposite. The hematite nanoparticles were obtained by template-free hydrothermal process. The PANI/a-Fe2O3 nanocomposite was synthesized by in situ chemical oxidative polymerization process of aniline in presence of a-Fe2O3 nanoparticles. The structural and morphological study and compositional analysis of PANI/a-Fe2O3 were performed by Fourier transform infrared spectroscopy, X-ray powder diffraction analysis, and scanning electron microscopy. The PANI/a-Fe2O3 sensor showed excellent reproducibility, ultra-fast response, and excellent sensitivity (46.72) as compared to PANI (29.72) sensor towards ammonia gas at room temperature.