Hydrothermal Synthesis of Single-Crystalline Bi2Fe4O9 Photocatalyst with Enhanced Visible-Light Photocatalytic Activity

被引：6

作者：

Ma, Huan ^{[1
]}

Liu, Qiyong ^{[1
]}

Zhang, Bo ^{[1
]}

Zhang, Renjie ^{[2
]}

Chen, Zhiyong ^{[2
]}

Li, Yanqiang ^{[2
]}

Shao, Weiquan ^{[2
]}

Wu, Xinyan ^{[3
]}

Zhang, Yongcheng ^{[2
]}

Ye, Wanneng ^{[1
,2
]}

机构：

[1] Qingdao Univ, State Key Lab Biofibers & Ecotext, Qingdao 266071, Shandong, Peoples R China

[2] Qingdao Univ, Coll Phys, Qingdao 266071, Shandong, Peoples R China

[3] Qingdao Univ, Coll Elect Engn, Qingdao 266071, Shandong, Peoples R China

来源：

JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY | 2019年 / 19卷 / 12期

基金：

美国国家科学基金会;

关键词：

Bi2Fe4O9; Hydrothermal Method; Photocatalyst; Methylene Blue; Photocurrent; ELECTRONIC-STRUCTURE; OPTICAL-PROPERTIES; PERFORMANCE; SEPARATION; TIO2;

D O I：

10.1166/jnn.2019.16855

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Submicron Bi2Fe4O9 crystals were successfully synthesized by a one-step hydrothermal synthesis method and employed effectively as a visible-light-driven photocatalyst for the degradation of methylene blue dye. Scanning electron microscopy and transmission electron microscopy observations revealed that the as-prepared sample consisted mainly of submicron plates and a small quantity of submicron particles. The ultraviolet-visible absorption spectrum of the submicron Bi2Fe4O9 crystals shows two broad absorption edges in the visible region with band gaps of 1.57 and 2.15 eV, respectively. The photodegradation rate of Bi2Fe4O9 is more than twice that of TiO2 for the degradation of methylene blue under visible-light irradiation, demonstrating the excellent photocatalytic activity of these submicron Bi2Fe4O9 crystals. The acquired photocurrent densities are 43.3 and 46.6 mu A/cm(2) for visible-light and ultraviolet-visible irradiation, respectively. These results demonstrate that the submicron Bi2Fe4O9 crystals are potential visible-light photocatalysts for use in environmental purification and solar energy utilization.

引用

页码：7859 / 7865

页数：7

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