Tailoring pyroelectric and pyrocatalytic properties in NBT-6BT via Fe-doping

The present work investigates enhancement in depolarization temperature (T_d) and pyroelectric property of Fe-doped 0.94Na_0.5Bi_0.5TiO₃-0.06BaTiO₃. The enhanced T_d and pyroelectric coefficient (p) for Fe-doped (0–1.5 mol %) 0.94Na_0.5Bi_0.5TiO₃-0.06BaTiO₃ (NBT-6BT) play an essential role in pyrocatalytic driven dye degradation application. The maximum T_d and p are obtained as ~ 140 °C and 4.95 × 10^− 4 Cm^− 2°C^− 1 for 1% Fe-doped NBT-6BT. The higher p promotes enhanced charge generation, which improves the pyrocatalysis process. The methylene blue (MB) dye degradation of 57% is achieved by 1% Fe-doped NBT-6BT (powder form) in 60 heating/cooling cycles. The radical trapping experiment is done to ensure the presence of various radicals in the pyrocatalysis process. The bulk form of best composition is also investigated to overcome the limitations of catalyst in powder form during dye degradation.