[17a-P01-1~29] 9 応用物性（ポスター）

英語発表

[17a-P01-15] Enhanced Hydrogen Production via Synergistic Photo-Piezocatalysis in BaTiO₃/ZnIn₂S₄ Heterostructures

〇(P)TingHan Lin¹, JiaMao Chang¹, YuChi Peng¹, YenChang Chen¹, YinHsuan Chang¹, KunMu Lee¹, MingChung Wu¹ (1.Chang Gung Univ.)

キーワード：

Photo-piezocatalysis、BaTiO3/ZnIn2S4 Heterostructures、Hydrogen evolution

Power-to-X technologies are crucial for the energy transition, mitigating climate change by offsetting emissions, with hydrogen energy standing out for its zero-emission profile. Integrating the piezoelectric effect, triggered by mechanical strain, benefits the charge carrier separation to boosting catalytic efficiency. In this study, we synthesized visible-driven ZnIn₂S₄ nanosheets as photocatalysts and integrated them with nanosized BaTiO₃ piezocatalysts for hydrogen production via water splitting and biomass reforming. We engineered a heterostructure to create BaTiO₃/ZnIn₂S₄ photo-piezocatalysts, observing a well-dispersed distribution of nanocubes onto nanosheets. Significant modifications in the morphological, crystal structures, and optical properties were observed. In photo-piezocatalysis, the optimal BaTiO₃/ZnIn₂S₄ achieved a hydrogen production rate of 154.04 μmol/g^-1/h^-1, which is 3.55 times higher than that of pristine BaTiO₃ or ZnIn₂S₄ alone. This increase is attributed to the synergistic effects of photocatalysis and piezocatalysis. To elucidate the synergistic pathways of energy-induced charge carriers, we employed in-situ X-ray photoelectron spectroscopy under halogen illumination, which revealed the charge redistribution and band alignment between BaTiO₃ and ZnIn₂S₄, which strengthens the internal electric field and further supports electron retention and hole migration. The continuous dipole formation at the interface promotes the high-efficiency redox reactions. This synergistic effect enables efficient hydrogen production through photo-piezocatalysis, applicable in water splitting and biomass reforming, positioning the BaTiO₃/ZnIn₂S₄ heterostructure as a promising solution for green energy technologies.