Synthesis of Piezoelectric Cu‐MOF Nanosheets for Catalysis Degradation of Refractory Organic Pollutants

species, while piezoelectric force microscopy and piezocurrent measurements unequivocally revealed its remarkable piezoelectric response. Under ultrasonic irradiation, the catalyst generated various reactive oxygen species, thus achieving a degradation efficiency of 93.6% for 20 mg/L methylene blue (MB) solution within 15 min. The potential piezoelectricity of the Cu-TCPP nanosheets originates from their asymmetric internal structure, which is conferred by the presence of centrally chelated copper ions in two distinct valence states. Furthermore, the material maintained outstanding structural stability and catalytic activity after multiple reaction cycles, retaining 84% MB removal after three cycles.