Arti I. Nandapure; Subhash B. Kondawar; Bharti I. Nandapure; Manish M. Choudhari
Abstract
Polyaniline/ferrite nanocomposites have attracted increasing attention because they offer the possibility of a new generation of nanostructure materials with advanced applications like electromagnetic interference shielding, rechargeable batteries, corrosion devices due to their flexibility, inexpensive ...
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Polyaniline/ferrite nanocomposites have attracted increasing attention because they offer the possibility of a new generation of nanostructure materials with advanced applications like electromagnetic interference shielding, rechargeable batteries, corrosion devices due to their flexibility, inexpensive and easy of synthesis. Polyaniline (PANI) containing MFe2O4 were prepared by in-situ polymerization of aniline in aqueous solution (Where M-represent divalent metal cation, M2+ = Ni2+). PANI reduces the agglomeration of nanosized nickel ferrite (NiFe2O4) particles which is good for the stabilization of nanoparticles. The investigation of structural, morphological and optical properties was carried out for the synthesized PANI/NiFe2O4 nanocomposites using X-ray diffraction (XRD), Transmission electron microscopy (TEM) and Ultraviolet visible spectrophotometer (UV-Vis). XRD revealed that the structure of NiFe2O4 nanoparticles is spinel with space group Fd3m and crystallite size 14 nm. Lattice parameter was found to increases with NiFe2O4 concentration in PANI and this may be due to the larger ionic radius of the Ni2+ ion. XRD pattern of PANI/NiFe2O4 nanocomposites at different ferrite molar percent are just the superposition of those of polyaniline and ferrite nanoparticles. Transmission electron microscopy of PANI/NiFe2O4 nanocomposites show increase in particle size over pure a NiFe2O4 nanoparticles which is relevant with XRD results. UV-Visible absorption spectroscopy of PANI/NiFe2O4 nanocomposites shows two absorption bands in range of 300-350 nm and 600-650 nm which reflects interaction of ferrite nanoparticles with PANI. Copyright © 2017 VBRI Press.
Niranjana M; Sharanappa Chapi; Yesappa L; Archana K; Raghu S; Devendrappa H
Abstract
Polyaniline (PANI) composites doped with Vanadium pentoxide (V2O5) of different weight percentage using dodecylbenzene sulfonic acid (DBSA) as surfactant was prepared by in-situ chemical oxidation reaction method. Here ammonium persulphate was used as an oxidizing agent. The formation of composite (PANI/DBSA/V2O5) ...
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Polyaniline (PANI) composites doped with Vanadium pentoxide (V2O5) of different weight percentage using dodecylbenzene sulfonic acid (DBSA) as surfactant was prepared by in-situ chemical oxidation reaction method. Here ammonium persulphate was used as an oxidizing agent. The formation of composite (PANI/DBSA/V2O5) was confirmed with the help of analytical studies like scanning electron microscopy (SEM) and UV/Vis spectroscopy. SEM images show a substantial change in PANI morphology after incorporation of vanadium pentoxide. The optical characterizations by UV-Vis absorption spectroscopy show the increased absorption with addition of V2O5. The electrical conductivity has been studied in the frequency range of 20 Hz to 1MHz and it is found that PANI/DBSA:2%(V2O5) shows high electrical conductivity compared to pure PANI and other composites. It is observed that the dielectric constant and dielectric loss increase with concentration of V2O5. PANI/DBSA/V2O5 composites are most promising material for many electrical and potential applications. This semiconducting polymer combination of PANI and Vanadium pentoxide (V2O5) which produce hybrid material, behaves as semiconductor at low temperatures; this behavior is predicted by results of dielectric properties studied. Copyright © 2017 VBRI Press.