Cu-doped oxygen-rich vacancy MOFs derived perovskite for enhanced mineralization of refractory organics through synergistic non-radical species effects

Abstract

This research focused on creating oxygen vacancy-enriched copper-doped LaFeO3 perovskite using a Prussian blue MOF template. This new material, LFO-Cu, showed outstanding Bisphenol A (BPA) degradation with 98 % efficiency in just 30 min, ten times faster than pure LaFeO3 (LFO). Moreover, the LFO-Cu/peroxymonosulfate (PMS) system worked effectively at pH levels from 4 to 10, breaking down various pollutants (TC, PhOH, MV, MB), and removing 85 % TOC in BPA and 50 % in TC. Density Functional Theory (DFT) calculations revealed that copper strengthened the catalyst-PMS interaction, leading to the generation of highly reactive oxygen species (ROS), primarily singlet oxygen (1O2) and superoxide radicals (O2–·). A degradation pathway was proposed, showing less toxic intermediates than BPA. In summary, copper-doped oxygen-rich vacancy MOFs-derived perovskite has significant potential for improving refractory organic mineralization.