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Journal of Advanced Ceramics

Authors

Chengye YU, Beijing Advanced Innovation Center for Materials Genome Engineering, University of Science and Technology Beijing, Beijing 100083, China; Institute for Advanced Material and Technology, University of Science and Technology Beijing, Beijing 100083, China
Mengxi TAN, Beijing Advanced Innovation Center for Materials Genome Engineering, University of Science and Technology Beijing, Beijing 100083, China; Institute for Advanced Material and Technology, University of Science and Technology Beijing, Beijing 100083, China
Chengdong TAO, Beijing Advanced Innovation Center for Materials Genome Engineering, University of Science and Technology Beijing, Beijing 100083, China; Institute for Advanced Material and Technology, University of Science and Technology Beijing, Beijing 100083, China
Yuxuan HOU, Beijing Advanced Innovation Center for Materials Genome Engineering, University of Science and Technology Beijing, Beijing 100083, China; Institute for Advanced Material and Technology, University of Science and Technology Beijing, Beijing 100083, China
Chuanbao LIU, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
Huimin MENG, Institute for Advanced Material and Technology, University of Science and Technology Beijing, Beijing 100083, China
Yanjing SU, Beijing Advanced Innovation Center for Materials Genome Engineering, University of Science and Technology Beijing, Beijing 100083, China; Institute for Advanced Material and Technology, University of Science and Technology Beijing, Beijing 100083, China
Lijie QIAO, Beijing Advanced Innovation Center for Materials Genome Engineering, University of Science and Technology Beijing, Beijing 100083, China; Institute for Advanced Material and Technology, University of Science and Technology Beijing, Beijing 100083, China
Yang BAI, Beijing Advanced Innovation Center for Materials Genome Engineering, University of Science and Technology Beijing, Beijing 100083, China; Institute for Advanced Material and Technology, University of Science and Technology Beijing, Beijing 100083, China

Keywords

piezotronics, photocatalysis, polarization, heterostructure

Abstract

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.

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