SYNTHESIS OF NANOSTRUCTURES OF POLYANILINE DOPED WITH INORGANIC DOPANT FOR SENSING AMMONIA (original) (raw)

Nanostructured samples of polyaniline (PANI), doped with inorganic bismuth nitrate (Bi(NO3)3), have been synthesized employing chemical oxidative polymerization and electrodeposition. The influence of the process variation on the structure, room temperature electrical conductivity and on ammonia vapour sensing performance (response percentage and response time) has been investigated. The synthesized samples have been structurally characterized by transmission electron microscopy (TEM) UV-VIS and Fourier transform infrared (FTIR) spectra. TEM analysis reveals formation of nanorods and nanospheres of PANI. Polymerization produces nanospheres of PANI and electrodeposition leads to formation of nanorod-like structures. The conductivity of the prepared samples were measured as a function of time after exposure to ammonia indicating that the polymerized sample exhibit fast response (least response time), while the electrodeposited samples show sluggish response. Thus response percentages ...

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