KBiFe
2
O
5
(KBFO)
is an upcoming promising
brownmillerite-structured multiferroic photoactive material for next-generation
photovoltaic and photocatalytic applications. In the present work,
KBFO has been developed using multistep thermal treatment method to
reduce the volatility of constituent elements and improve the stability
of compound. The band gap of KBFO (found to be ∼1.68 eV) extends
to the near-infrared region compared to traditional perovskite-structured
multiferroics. The magnetic and dielectric transitions occur in the
same temperature range (740 K–800 K), reflecting the existence
of magneto-dielectric effect in the as-synthesized sample. It also
shows promising photocatalytic activity by degrading organic effluents
under natural sunlight compared to regular perovskite BiFeO
3
photocatalyst (operating under visible light). A new application
of brownmillerite multiferroic KBFO photocatalyst in environmental
and energy applications has been explored by integrating the structural,
optical, magnetic, and dielectric properties of the same.
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