A Dual-Piezoelectric Metal-Organic Cage/COF Z-Scheme Heterojunction for Solar-Mechanical Water Splitting.

ABSTRACT: Developing efficient solar-mechanical energy conversion systems is crucial for sustainable H₂/H₂O₂ production. We report an unprecedented piezoelectric metal-organic cage (MOC-FA3), integrated with piezoelectric β-ketoenamine COF (S-COF) into a Z-scheme heterojunction via supramolecular interactions. The non-centrosymmetric piezoelectricity of MOC-FA3 is confirmed by multimodal characterization (KPFM, piezoelectric coefficient measurement, and in situ spectroscopy) and piezocatalytic H₂/H₂O₂ production (334.3/203.6 µmol g^-1 h^-1). Under ultrasound (60 W, 40 kHz) and AM 1.5G, the heterojunction achieves exceptional synergistic pure water splitting at 1297.6 H₂ and 1304.2 H₂O₂

SUBMITTER: Li XA 

PROVIDER: S-EPMC12915073 | biostudies-literature | 2026 Feb

REPOSITORIES: biostudies-literature