... Preparation, characterization and gas sensitivity of polypyrrole/g-Fe2O3hybrid materials§Lina Genga,*, Shihua WubaDepartment of Chemistry, Hebei ... of ChinabDepartment of Chemistry, Nankai University, Tianjin 300071, People’s Republic of China1. IntroductionOrganic–inorganic hybrid materials composed of ... degree of uniformity of the molecular weight of PPy and resulted in a change of g-Fe2O3microstructure from granular to stickparticles. The results of ...