Synthesis of mesoporous strontium titanate by molten salt assisted template‐free method

Abstract

Mesoporous SrTiO 3 was synthesized via the NaOH/KOH molten salt method.The detailed formation mechanism for the mesoporous SrTiO 3 should be obtained to adjust the microstructure, which is an import factor affecting the photocatalytic activity. The detailed mechanism is explored by studying the intermediate phase.It is found that the NaOH/KOH molten salt method for mesoporous SrTiO 3 synthesis, using four kinds of TiO 2 with different morphologies as precursors, follows the precursor dissolution-precipitation growth mechanism. The mesoporous SrTiO 3 structure originates from the reservation of space for NaOH/KOH. The crystallinity, number of pores, and size of particles are affected by the cleaning temperature, which can thus influence the photocatalytic activity.