Enhanced piezo-photocatalytic performance in Bi₅Ti₃FeO₁₅ micro-crystalline platelets synthesized by a molten-salt method

The piezoelectric enhancement technology for photocatalysts used in pollutant degradation is an innovative approach in the field of environmental protection. In this paper, Bi₅Ti₃FeO₁₅ (BTFO) micro-crystalline platelets catalysts synthesized by a molten-salt method were applied for pollutant degradation, which can achieve a synergistic enhanced catalytic performance by coupling the piezo- and photo- multi-field effects. The enhanced catalytic performance of BTFO platelets stems from its unique single-crystal structure, sheet-like morphology, narrow bandgap energy and piezoelectric assistance. The piezo-induced build-in electric field accelerates the carrier separation and migration during the application of ultrasound excitation. This work provides a feasible strategy in the preparation of efficient catalysts by utilizing multi-field coupling effects.