Synthesis of Bi2WO6 composites by carbon adsorption for visible light photocatalytic degradation of metronidazole

被引：5
作者：
Guo, Xiaohui [1 ]
Yang, Huimin [1 ]
Liu, Jinyan [1 ]
Guo, Guibao [1 ]
机构：
[1] Inner Mongolia Univ Sci & Technol, Sch Chem & Chem Engn, Baotou 014010, Inner Mongolia, Peoples R China
来源：
REACTION KINETICS MECHANISMS AND CATALYSIS | 2017年 / 120卷 / 02期
基金：
中国国家自然科学基金;
关键词：
Bi2WO6/Bi2O3/WO3; composites; Carbon adsorption; Metronidazole; Degradation; HYDROTHERMAL SYNTHESIS; ANTIBIOTIC-RESISTANCE; FACILE SYNTHESIS; TIO2; PH; NANOCOMPOSITE; NANOPARTICLES; INHIBITION; BETA-BI2O3; FATE;
D O I：
10.1007/s11144-016-1119-1
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：
Bi2WO6/Bi2O3/WO3 composites were successfully prepared by a facile carbon adsorption strategy. The structure of Bi2WO6 composites can be controlled by adjusting Bi/W molar ratio and precursor pH. The photocatalytic activity of the sample was assessed for the degradation of metronidazole under visible light irradiation. The Bi2WO6/WO3 composite synthesized at Bi/W molar ratio of 1:1 displayed higher photocatalytic performance than other samples due to its WO3-Bi2WO6 n-n heterojunction and narrow bandgap and which made this sample respond to visible light, especially the wavelength after 500 nm and efficiently inhibited recombination of electron-hole pairs. The presence of NaCl in metronidazole solution significantly decreased photodegradation efficiency of metronidazole from 93.3 to 65.2% within 180 min. The negative effect of NaCl on degradation activity can be ascribed to quenching of oxidizing radicals and valence band holes.
引用
收藏
页码：809 / 820
页数：12
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