Effects of La and Ni doping on ferroelectric and photocatalytic properties of Aurivillius Bi7Ti3Fe3O21. (December 2021)

• Record Type: Journal Article
• Authors: Fang, Wei; Zhao, Hongyang; Jia, Tingting; Fu, Qiuming; Xu, Chuanbo; Tao, Hong; Weng, Jun; Wang, Shenggao; Ma, Zhibin
• Is Part Of: Solid-state electronics. Volume 186(2021)
• Publication Date: 2021-12
• Subjects: Aurivillius phase -- Ferroelectric -- Photocatalytic; Semiconductors -- Periodicals; Semiconducteurs -- Périodiques; 621.38152
• DOI: 10.1016/j.sse.2021.108170
• Languages: English
• ISSNs: 0038-1101

Abstract

Highlights: Ni doped BTF can promote the grain radius and reduces photocatalytic performance. La doped BTF reduces the band gap and promotes photocatalytic efficiency. La doped BTF reduces the leakage current and improves the ferroelectricity. The maximum lattice asymmetry of La, Ni: BTF causes the highest ferroelectricity. Abstract: Bismuth layered structure materials with Aurivillius phase usually show amazing structure and physical properties. The influence of La and Ni doping on the structure, ferroelectricity and photocatalytic performance of Bi7 Ti3 Fe3 O21 (BTF), Bi5.6 La1.4 Ti3 Fe3 O21 (La: BTF), Bi7 Ti3 Fe2.4 Ni0.6 O21 (Ni: BTF) and Bi5.6 La1.4 Ti3 Fe2.4 Ni0.6 O21 (La, Ni: BTF) ceramics are explored. The enhancement of La: BTF ferroelectricity is due to the reduction of leakage current and oxygen vacancies. Co-doped La, Ni: BTF has the highest degree of ferroelectric polarization due to the large distortion of the lattice structure. La: BTF has the highest photocatalytic degradation efficiency for methylene blue (MB) dye. The reduction of grain radius, band gap and enhancement of ferroelectric polarization play a vital role in improving photocatalytic efficiency. Ni doping suppresses photocatalysis of BTF to some extent.