Abstract
A simple chemical method was employed to form Fe 2+ doped polypyrrole (PPY) by the introduction of hydrated ferric chloride (FeCl 3·6H 2O) during the polymerization of pyrrole, where FeCl 3·6H 2O played a role of oxidant for the polymerization and the in situ forming reduced product (FeCl 2·2H 2O) was well doped in PPY. The resultant Fe 2+ doped PPY species were characterized by using various techniques, including X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and field emission scanning electronic microscope (FE-SEM). Humidity-sensitive properties of the samples were also examined. The Fe 2+ doped PPY exhibited a fast response to humidity change (about 20 s), in which great changes of more than three orders (nearly four) of magnitude in impedance was observed when relative humidity was varied over the whole range. The improved properties may be related to the presence of the hydrophilic Fe 2+, and a possible mechanism was also provided.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
