期刊
JOURNAL OF HAZARDOUS MATERIALS
卷 399, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.jhazmat.2020.123159
关键词
BiVO4; Photocatalytic mechanism; Crystalline phase controlling; Exposed facets
资金
- National Natural Science Foundation of China [21972073, 21677086, 21577078, 21577077]
- Innovation Group Project of Hubei province [2015CFA021]
- China Postdoctoral Science Foundation [2018M640721]
- Postdoctoral Science Foundation of Hubei province [G83]
- open fund of key laboratory of inorganic nonmetallic crystalline and energy conversion materials (China Three Gorges University) [2018KIE05]
A series of BiVO4 photocatalysts were prepared by a co-precipitation followed hydrothermal synthesis method for the photodegradation of Rhodamine B (RhB) and 2,4-Dichlorophenol (2,4-DCP). The crystalline phase ratio of the heterostructured BiVO4 (m-BiVO4/t-BiVO4) between monoclinic and tetragonal could be easily controlled at different pH and hydrothermal time. Interestingly, the as-prepared heterostructured BiVO4 photocatalyst at pH = 7 for 24 h (BiVO4-7-24) showed the highest photocatalytic activities for the degradation of RhB, while the best photodegradation of 2,4-DCP was obtained at pH = 0.5 for 24 h (BiVO4-0.5-24). The photocatalytic mechanism can be explained by the different charge carrier transfer pathways and active oxidation species in the m-BiVO4/t-BiVO4 heterostructure. More importantly, the exposed facets originated from crystalline phase controlling in BiVO4-0.5-24 and BiVO4-7-24 photocatalyst is an essential reason for the different photo catalytic activity. The proposed energy band alignments of BiVO4-0.5-24 and BiVO4-7-24 photocatalyst provide insights into the photocatalytic mechanism of the m-BiVO4/t-BiVO4 heterostructure.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据