Open AccessSilver Doped Polyaniline-Graphene Based Barium Ferrite Composite as Humidity Sensor and Photocatalyst
Author(s) -
K. Vinay,
Y. T. Ravikiran,
M. Revanasiddappa,
Anand Kumar,
K. Veena,
C.R. Ravikumar,
H. C. Ananda Murthy
Publication year - 2021
Publication title -
asian journal of chemistry/asian journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.145
H-Index - 34
eISSN - 0975-427X
pISSN - 0970-7077
DOI - 10.14233/ajchem.2021.23439
Subject(s) - composite number , dielectric , chemistry , graphene , ammonium persulfate , dissipation factor , relative humidity , humidity , chemical engineering , polyaniline , polymerization , composite material , materials science , nanotechnology , polymer , physics , optoelectronics , engineering , thermodynamics
In this work, the response of humidity sensing and dielectric properties of PANI/Ag/graphene/BaFe12O19(PAGB) composite prepared by chemical interfacial oxidative polymerization method using theammonium peroxydisulfate as an oxidant is presented. The synthesized PAGB composite wascharacterized by using FT-IR, XRD, SEM and EDAX techniques. The measured dielectric constantand dielectric tangent loss values were found to decrease with increase in logarithmic frequency. Theelectrical resistance of the composite was also found to decrease from 2500 MΩ to 7 MΩ, on exposureto a wide range of relative humidity (RH) varying between 10% and 97% RH. This observed decreaseis due to capillary condensation of water molecules which cause the changes in electrical conductivityof composite. The synthesized PAGB-50% composite displayed a high sensitivity at low humidityranging from 20% to 60% RH. The composite has been proved to be a better candidate in the designof humidity sensors. In addition, PAGB composite exhibited efficiency towards the degradation oforganic anionic dye, acid orange-8, with high potential of reusability.