SEM image of as-synthesized NiFe2O4/BiOI (NFO/BOI) nanocomposites (a) and schematic illustration of excitation and separation of photo-induced electron–hole pairs for NFO/BOI nanocomposites (b).
Photocatalytic degradation of RhB for all samples under simulated solar light illumination and absorption spectra of RhB over 15 wt% SrTiO3/NiFe2O4 nanocomposites.