Piezoelectric catalysis of CeO2 doped (Ba0.85Ca0.15)(Zr0.1Ti0.9)O3 solid solutions for dye wastewater decomposition under phase boundary engineering

作者：Yu Zhao, Xiaohua Zhang, Haoze Li, Cheng-Long Yu, Pei Zhang, Zhenxing Yue · 发表于：Separation and Purification Technology · 年份：2024 · DOI：10.1016/j.seppur.2024.126746 · 被引用次数：19 · 研究领域：Ferroelectric and Piezoelectric Materials、Multiferroics and related materials、Perovskite Materials and Applications

Piezoelectric catalysis can drive pollutant degradation by means of piezoelectric effect with mechanical–electrical energy conversion. Here, we propose to modulate the phase boundary in CeO 2 doped (Ba 0.85 Ca 0.15 )(Zr 0.1 Ti 0.9 )O 3 compounds (BCZT-CeO 2 ) to improve piezoelectric catalytic activity. The interrelationships between composition, phase structure, electrochemistry, and catalytic performance were methodically examined. BCZT-0.04 wt%CeO 2 coexists in orthorhombic and tetragonal phases with a high piezoelectric coefficient (d 33 = 425 pC/N) and demonstrates enhanced piezoelectric catalytic performance. The polarized BCZT-0.04 wt%CeO 2 acquires the remarkable degradation ratio of 92.5 % for Rhodamine B dye within 60 min. The enhancement of piezo-catalytic activity was further identified through the electrochemical analysis and hence the reasonable mechanism of polarization-induced charge transfer was proposed for piezoelectric catalysis as well. This work provides a promising strategy for boosting the piezoelectric catalytic performance under phase boundary engineering and potentially extends the application range of lead-free ferroelectric materials, typically towards pollutant treatment.