Effects of InNbO₄ Fabrication on Perovskite PIN‐PMN‐PT

Abstract

Effects of InNbO4 (IN) fabrication on phase purity of the perovskite 23Pb(In1/2Nb1/2)O3‐45Pb(Mg1/3Nb2/3)O3‐32PbTiO3 (PIN‐PMN‐PT) were studied. Excess In2O3 and annealing process on the phase of the synthesized IN were investigated. In addition, the precalcined IN and mixed IN powders on the phases of PIN‐PMN‐PT were discussed. The experimental results indicated that excess In2O3 have has minimal influence on the phase of IN due to the higher chemical activity of In2O3, IN powder with 3% In2O3 excess was in gray color because of the reaction, In2O3→In2O, which can be changed to white color by annealing at 850°C in air. It was apparent that the mixed IN would benefit the pyrochlore‐free PIN‐PMN‐PT rather than precalcined IN powders. An optimized way for preparing PIN‐PMN‐PT materials was also proposed in this article.

Enhanced photocatalytic hydrogen generation of nano-sized mesoporous InNbO4 crystals synthesized via a polyacrylamide gel route

“…Therefore, the preparation of nanostructured InNbO 4 photocatalyst of high crystallinity and specific geometry is of great importance for excellent photocatalytic activity. Up to now, representative works have been demonstrated on InNbO 4 photocatalysts fabricated with various approaches besides the most commonly used solid-state reaction [20][21][22][23][24][25], such as hydrothermal method (producing graphene/InNbO 4 composites) [26], mechanochemical activation (for N-doping) [17], nonaqueous sol-gel route [27], electrospinning (yielding InNbO 4 nanofibers) [28,29], aerosol assisted atmospheric pressure chemical vapour deposition [30], and low temperature strategy (using niobium citrate complex) [31]. However, most of these recently works were focused on dye degradation properties of InNbO 4 , insights into their photocatalytic water splitting have seldom been put forward.…”