Enhanced visible-light-driven photocatalytic activity of BiFeO3 via electric-field control of spontaneous polarization

被引：49

作者：

Huang, Guoquan ^{[1
]}

Zhang, Ganghua ^{[2
]}

Gao, Zhipeng ^{[3
]}

Cao, Jianwu ^{[2
]}

Li, Dezeng ^{[4
]}

Yun, Hong ^{[1
]}

Zeng, Tao ^{[2
,5
]}

机构：

[1] Shanghai Univ Elect Power, Coll Environm & Chem Engn, Shanghai Key Lab Mat Protect & Adv Mat Elect Powe, Shanghai 200090, Peoples R China

[2] Shanghai Res Inst Mat, Shanghai Key Lab Engn Mat Applicat & Evaluat, Shanghai 200437, Peoples R China

[3] China Acad Engn Phys, Inst Fluid Phys, Natl Key Lab Shock Wave & Detonat Phys, Mianyang 621900, Peoples R China

[4] East China Normal Univ, Sch Chem & Mol Engn, Shanghai 200241, Peoples R China

[5] Saitama Inst Technol, Adv Sci Res Lab, Okabe, Saitama 3690293, Japan

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2019年 / 783卷

关键词：

BiFeO3; nanoparticles; Electrical poling technology; Ferroelectric polarization; Photocatalytic activity; Organic-inorganic composite film; HYDROTHERMAL SYNTHESIS; PHOTOCHEMICAL REDUCTION; SOLAR ABSORPTION; FACILE SYNTHESIS; EFFICIENT; FABRICATION; COMPOSITE; DEGRADATION; PERFORMANCE; SEPARATION;

D O I：

10.1016/j.jallcom.2019.01.017

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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.

引用

页码：943 / 951

页数：9

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