Remarkably enhanced piezo-photocatalytic performance in BaTiO3/CuO heterostructures for organic pollutant degradation

• 作者: Chengye YU Mengxi TAN Chengdong TAO Yuxuan HOU Chuanbao LIU Huimin MENG Yanjing SU Lijie QIAO Yang BAI
• 来源期刊: 先进陶瓷（英文版）
• 年，卷（期）: 2022,（3）
• 所属期刊栏目: Research Article
• 页码范围: 414-426
• 页数: 13页
• 语种: 英文

摘要

Introducing polarization field of piezoelectric materials is an effective strategy to improve photocatalytic performance.In this study,a new type of BaTiO3/CuO heterostructure catalyst was designed and synthesized to achieve high piezo-photocatalytic activity through the synergy of heterojunction and piezoelectric effect.The BaTiO3/CuO heterostructure shows a significantly enhanced piezo-photocatalytic degradation efficiency of organic pollutants compared with the individual BaTiO3 nanowires(NWs)and CuO nanoparticles(NPs).Under the co-excitation of ultrasonic vibration and ultraviolet radiation,the optimal degradation reaction rate constant k of polarized BaTiO3/CuO heterostructure on methyl orange(MO)dye can reach 0.05 min-1,which is 6.1 times of photocatalytic rate and 7 times of piezocatalytic rate.The BaTiO3/CuO heterostructure with remarkable piezo-photocatalytic behavior provides a promising strategy for the development of high-efficiency catalysts for wastewater purification,and it also helps understand the coupling mechanism between piezoelectric effect and photocatalysis.