Piezo-photocatalytic treatment of acetaminophen-contaminated wastewater using Fe0.33V2O5

Abstract

A Fe_0.33V₂O₅-based piezoelectric photocatalytic system was developed. Two distinct iron vanadate structures (Fe_0.33V₂O₅ and Fe₂V₄O₁₃) were synthesized through different annealing temperatures. The Fe_0.33V₂O₅ obtained at 250 °C exhibited superior piezoelectric performance compared to Fe₂V₄O₁₃ due to structural differences. Fe_0.33V₂O₅-250 °C (FVO-250 °C) demonstrated enhanced carrier separation efficiency and broad light absorption range, achieving 90% acetaminophen degradation within 40 minutes through efficient piezo-photocatalytic synergy. PL and electrochemical tests proved that FVO-250 °C moves charges better than other catalysts. PFM tests clearly showed that FVO-250 °C has much stronger piezoelectricity than FVO-450 °C.