期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 783, 期 -, 页码 943-951出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2019.01.017
关键词
BiFeO3 nanoparticles; Electrical poling technology; Ferroelectric polarization; Photocatalytic activity; Organic-inorganic composite film
资金
- NSF of China [51772184, 21003089, 11704353]
- Program of Shanghai Technology Research Leader [17XD1420300]
- Science and Technology Commission of Shanghai Municipality [14DZ2261000]
- LSD engineering project [2016Z-04]
- Dean Fund of CAEP [YZJJLX2016001]
- CSS project [YK2015-0602006]
- NSF of Zhejiang Science and Technology Department [LGG18E020006]
- LSD fund [6142A03010102]
Well-polarized BiFeO3 nanoparticles have been successfully prepared by a facile electrical poling method with the assist of a soluble organic-inorganic composite film. From XRD, TEM and SEM studies, no significant change in the crystal structure or morphology was detected after the electrical poling process. The visible-light driven photocatalytic process of poled BiFeO3 nanoparticles was accelerated by 2 times compared to unpoled BiFeO3. By combining time-resolved photoluminescence (PL), photoinduced silver deposition testing and photoelectrochemical measurements, it can be revealed that the enhanced photocatalytic performance of poled samples can be properly attributed to the promoted separation and prolonged lifetime of the photogenerated carriers caused by the ferroelectric polarization. These findings may offer a new route to promote the photocatalytic or photoelectric performances of BiFeO3 for advanced applications by adjusting the ferroelectric polarization. (C) 2019 Elsevier B.V. All rights reserved.
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