Experimental Studies on Current, Susceptance, Impedance and Electrical Modulus of Polypyrrole/Molybdenum Trioxide Composites
Keywords:Molybdenum Trioxide, Composites, Modulus, Impedance
Polypyrrole/molybdenum trioxide composites (PPy/MoO3) were synthesized by chemical oxidation method, which involved the polymerization of pyrrole (PPy) with molybdenum trioxide (MoO3). This process involved ammonium persulphate which acted as an oxidizing agent.Diverse compositions of MoO3 such as 10, 20, 30, 40 and 50 wt. % in pyrrole were used to synthesize PPy/MoO3 composites.Scanning Electron Microscopy (SEM) image of the above composites has revealed the presence of multiple phases comprising of MoO3 particles embedded in PPy chain. The observed increase in current could be due to hopping of a large number of charge carriers between favorable localized sites and is attributed to change in the distribution pattern of MoO3 particles.The present study also involved the measurement of susceptance, impedance and electrical modulus, and has disclosed the major influence of dimensions of MoO3 particles present in the matrix on all the properties. The composites discussed in the present study may throw some light on their applications in various areas namely humidity sensor, micro power generator, dielectrics and as semiconductors.
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