Preparation of BiF3/BiOBr heterojunctions from microwave-assisted method and photocatalytic performances

被引：56
作者：
Zhang, Shujuan [1 ,2 ]
Chen, Xiaoxiao [3 ]
Song, Limin [4 ,5 ]
机构：
[1] Tianjin Univ Sci & Technol, Coll Sci, Tianjin 300457, Peoples R China
[2] Tianjin Agr Univ, Coll Basic Sci, Tianjin 300384, Peoples R China
[3] Tianjin Univ Sci & Technol, Coll Chem Engn & Mat Sci, Tianjin 300457, Peoples R China
[4] Tianjin Polytech Univ, Coll Chem & Chem Engn, Tianjin 300387, Peoples R China
[5] Tianjin Polytech Univ, State Key Lab Hollow Fiber Membrane Mat & Membran, Tianjin 300387, Peoples R China
来源：
JOURNAL OF HAZARDOUS MATERIALS | 2019年 / 367卷
关键词：
Microwave-assisted method; BiF3/BiOBr; Photocatalytic activity; Rhodamine B; VISIBLE-LIGHT-DRIVEN; IN-SITU SYNTHESIS; SOLVOTHERMAL SYNTHESIS; RHODAMINE-B; PHOTOINDUCED STABILITY; DEGRADATION; IRRADIATION; NANOSHEETS; PHOTODEGRADATION; NANOCOMPOSITES;
D O I：
10.1016/j.jhazmat.2018.12.060
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Novel BiF3/BiOBr heterojunction photocatalysts were prepared from a fast and stable microwave-assisted method, and characterized by X-ray diffractometry, X-ray photoelectron spectroscopy, scanning electron microscopy, ultraviolet-visible spectroscopy and fluorescence spectroscopy. The photocatalytic activity of BiF3/BiOBr heterojunctions under light irradiation was significantly higher than pure BiOBr or BiF3, and was maximized at the Br:F molar ratio of 1:1, as the targeted 20 mg/L Rhodamine B (RhB) solution was completely degraded within 40 min. This was mainly because the unique BiF3/BiOBr heterojunction formed during photocatalytic degradation accelerated the photoelectron and hole separation, effectively enhanced the quantum efficiency, and thereby strengthened the photocatalytic activity.
引用
收藏
页码：304 / 315
页数：12
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