期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 783, 期 -, 页码 643-651出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2018.12.345
关键词
BiFeO3; Ferroelectric polarization; Photoanode; Water-splitting
资金
- Zhejiang Provincial Natural Science Foundation of China [LGG18E020004]
- Chinese National Natural Science Foundation [61704042]
- Science and Technology Project of Zhejiang Province [2015C37037]
A facile sol-gel methodology was used to synthesize single-phase BiFeO3 (BFO) film on TiO2 photoanode to improve photoelectrochemical (PEC) water-splitting efficiency. The BFO films with controllable thickness induced a considerable ferroelectric polarization under bias voltage, which effectively tuned the electric band bending of BFO/TiO2. The photocurrent density of the as-prepared BFO-5/TiO2 could reach up to 11.25 mA/cm(2), which is over 20 times higher than that of bare TiO2. Moreover, the positively poled BFO-5/TiO2 photoanode yielded a photocurrent density of 28.75 mA/cm(2) at 1.5 V vs.SCE under AM 1.5G illumination. This work suggests that BFO/TiO2 with combined ferroelectric and semiconducting features could be a promising solution to improve PEC performance by concurrently promoting the light absorption and charge-separation and transportation properties. (C) 2019 Elsevier B.V. All rights reserved.
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