Photoactive Brownmillerite Multiferroic KBiFe2O5 and Its Potential Application in Sunlight-Driven Photocatalysis | Zendy

Durga Sankar Vavilapalli | Zendy; Srikanti Kavita | Zendy; Ramanjaneyulu Mannam | Zendy; Brajesh Tiwari | Zendy; Mohan Kant K | Zendy; M. S. Ramachandra Rao | Zendy; Shubra Singh | Zendy

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Photoactive Brownmillerite Multiferroic KBiFe₂O₅ and Its Potential Application in Sunlight-Driven Photocatalysis

Author(s) -

Durga Sankar Vavilapalli,

Srikanti Kavita,

Ramanjaneyulu Mannam,

Brajesh Tiwari,

Mohan Kant K,

M. S. Ramachandra Rao,

Shubra Singh

Publication year - 2018

Publication title -

acs omega

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.779

H-Index - 40

ISSN - 2470-1343

DOI - 10.1021/acsomega.8b01744

Subject(s) - brownmillerite , multiferroics , photocatalysis , materials science , dielectric , band gap , perovskite (structure) , sunlight , optoelectronics , optics , crystallography , chemistry , ferroelectricity , physics , organic chemistry , catalysis

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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