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Synthesis and characterization of a heterogeneous ternary nanocomposite photocatalyst BiFeO3-Graphene-NaNbO3 for the degradation of MB dye disrupting pulmonary organs
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Abstract:
A maiden attempt to synthesize ternary nanocomposites of Bismuth Ferrite-Graphene-Sodium Niobate (BiFeO3-
Graphene-NaNbO3) has been made by utilizing conventional solution method. Systematic increase in the loading
concentrations of graphene on BiFeO3-NaNbO3 heterogeneous composites found to have influenced their
structural parameters, optical properties, photocatalytic dye degradation and their dielectric properties and they
were assessed from powder X-ray diffraction (XRD), Raman spectral measurements, Scanning Electron Microscopy
(SEM), Energy Dispersive X-ray (EDX), optical absorption spectra in UV–Visible-Near IR region, Photoluminescence
(PL) studies, photocatalysis and dielectric analyses. As such, admixture of graphene concentration
of 0.025 percent with BiFeO3-NaNbO3 composite powders capable of degrading the methylene blue (MB) dye
upto a maximum efficiency of 92% within the time frame of 120 min. Strikingly, at the same graphene concentration
of 0.025 percent, the synthesized ternary composite sample exhibits an increased dielectric constant
value of ‘37′. A close parallelism between the dielectric behaviour and photocatalytic dye degradation properties
could be predicted from this study. Further, among various loading concentrations of graphene with BiFeO3-
NaNbO3, lower concentration of 0.025 percent of graphene has been found as the optimum one for the improved
MB dye degradation characteristics of the ternary composites of BiFeO3-Graphene-NaNbO3 with enhanced
suppression of carrier recombination. The other interesting results have been discussed in detail.
Description:
Date:
2025
Authors:
Vidhya, S.
Subramanian, Yathavan
Durgadevi, K.
Sabarish, V.C. Bharath
Durairajan, A.
Graça, M.P.F.
Gajendiran, J.
Azad, Abul Kalam
Raj, S. Gokul
Kumar, G. Ramesh
Publisher:
Elsevier Ltd.
