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Journal of Advanced Ceramics

Authors

Angom Devadatta MANI, Shenzhen Key Laboratory of Special Functional Materials, Shenzhen Engineering Laboratory for Advanced Technology of Ceramics, Guangdong Research Center for Interfacial Engineering of Functional Materials, College of Materials Science and Engineering, Shenzhen University, Shenzhen 518071, China;Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
Jie LI, Shenzhen Key Laboratory of Special Functional Materials, Shenzhen Engineering Laboratory for Advanced Technology of Ceramics, Guangdong Research Center for Interfacial Engineering of Functional Materials, College of Materials Science and Engineering, Shenzhen University, Shenzhen 518071, China;Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
Ziquan WANG, College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen 518071, China
Jiale ZHOU, Shenzhen Key Laboratory of Special Functional Materials, Shenzhen Engineering Laboratory for Advanced Technology of Ceramics, Guangdong Research Center for Interfacial Engineering of Functional Materials, College of Materials Science and Engineering, Shenzhen University, Shenzhen 518071, China
Huaicheng XIANG, Shenzhen Key Laboratory of Special Functional Materials, Shenzhen Engineering Laboratory for Advanced Technology of Ceramics, Guangdong Research Center for Interfacial Engineering of Functional Materials, College of Materials Science and Engineering, Shenzhen University, Shenzhen 518071, China
Jinlai ZHAO, Shenzhen Key Laboratory of Special Functional Materials, Shenzhen Engineering Laboratory for Advanced Technology of Ceramics, Guangdong Research Center for Interfacial Engineering of Functional Materials, College of Materials Science and Engineering, Shenzhen University, Shenzhen 518071, China
Libo DENG, College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen 518071, China
Haitao YANG, Shenzhen Key Laboratory of Special Functional Materials, Shenzhen Engineering Laboratory for Advanced Technology of Ceramics, Guangdong Research Center for Interfacial Engineering of Functional Materials, College of Materials Science and Engineering, Shenzhen University, Shenzhen 518071, China
Lei YAO, Shenzhen Key Laboratory of Special Functional Materials, Shenzhen Engineering Laboratory for Advanced Technology of Ceramics, Guangdong Research Center for Interfacial Engineering of Functional Materials, College of Materials Science and Engineering, Shenzhen University, Shenzhen 518071, China

Keywords

photocatalysis, piezocatalysis, sonophotocatalysis, oxygen vacancy (OV)

Abstract

Photocatalytic degradation of organic pollutants is of great significance for wastewater remediation but is still hindered by the poor catalytic efficiency of the catalysts. Herein, we report a strategy to simultaneously introduce piezocatalysis and to enhance the intrinsic photocatalysis in a single catalyst, which improved the performance for catalytic degradation of methylene blue (MB) significantly. Specifically, piezoelectric BiFeO3 (BFO) nanotube doped with different contents of Gd and La (Bi0.9(GdxLa1-x)0.1FeO3) were produced by electrospinning. The doping led to a higher concentration of surface oxygen vacancy (OV) in Bi0.9Gd0.07La0.03FeO3, which effectively increased the piezoelectric field due to the deformation of BFO, and suppressed the recombination of photon-generated electron-hole pairs. The Bi0.9Gd0.07La0.03FeO3 nanotube showed excellent catalytic performance under simultaneous light irradiation and ultrasonic excitation, giving an extraordinary 95% degradation of MB within 90 min. These findings suggest that the piezoelectric effect combined with defect engineering can enhance the catalytic performance of Bi0.9Gd0.07La0.03FeO3 nanotube. This could potentially be extended to other catalytic systems for high-performance pollutant treatment.

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