Hydrothermal synthesis and photocatalytic activities of stabilized bismuth vanadate/bismuth tungstate composites

被引：24
作者：
Ketwong, Pradudnet [1 ]
Takashima, Mai [2 ,3 ]
Nitta, Akio [2 ]
Pookmanee, Pusit [1 ]
Ohtani, Bunsho [2 ,3 ]
机构：
[1] Maejo Univ, Dept Chem, Fac Sci, Chiang Mai 50290, Thailand
[2] Hokkaido Univ, Grad Sch Environm Sci, Sapporo, Hokkaido 0600810, Japan
[3] Hokkaido Univ, Inst Catalysis, Sapporo, Hokkaido 0010021, Japan
来源：
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING | 2018年 / 6卷 / 02期
关键词：
Bismuth vanadate/bismuth tungstate; Photocatalyst; Stabilization; Photoacoustic spectroscopy; VISIBLE-LIGHT; BI2WO6/BIVO4; HETEROJUNCTION; O-2; EVOLUTION; BIVO4; EFFICIENT; PARTICLES; WATER; TEMPERATURE; PHOTOANODES; PERFORMANCE;
D O I：
10.1016/j.jece.2018.01.062
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Bismuth vanadate/bismuth tungstate (BVO/BWO) composites in various BVO fractions (f(V)) were synthesized through hydrothermal reaction. Morphology analysis of the composites showed that rod-like BVO structures were partially deposited on flake-ball (FB) BWO particles. In addition, surface structures of BWO, BVO and BVO/BWO were studied in energy-resolved distribution of electron traps and conduction band-bottom (CBB) position by household reversed double-beam photoacoustic spectroscopy (PAS) and single-beam PAS, respectively. Apparent CBB of BVO/BWO was ca. 0.4 eV anodically shifted from BWO and almost similar to BVO. Moreover, photocatalytic oxygen liberation under irradiation of UV-vis and visible lights demonstrated that photocatalytic activities of the BVO/BWO composites were depended on f(V) and calcined BVO/BWO composites in which BVO was stabilized on BWO showed enhancement of photocatalytic activity comparing to a pristine BVO. The prolonged and the highest active photocatalyst under visible light was calcined 0.80 f(V) due to BVO stabilization on FB-BWO particles.
引用
收藏
页码：2048 / 2054
页数：7
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