期刊
APPLIED SURFACE SCIENCE
卷 544, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.apsusc.2020.148883
关键词
Bi2SiO5; BiOI; Nanoflower; Heterostructures; Step-scheme
类别
资金
- National Natural Science Foundation of China [21777168]
- Sichuan science and Technology Department [2019YJ0457, 2019ZYZF0069]
- Project of Zigong City [2018YYJC10]
- Jiangsu Key Laboratory of Environment Functional Materials [SJHG1805]
- Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province [CSPC201903]
3D nanoflower-like BiOI/Bi2SiO5 heterojunctions were successfully synthesized in the presence of ionic liquid [PrMIm]I by a mild solvothermal method. These heterojunctions exhibit high photocatalytic performance, stability, and photoinduced charge separation mechanism.
Novel 3D nanoflower-like BiOI/Bi2SiO5 heterojunctions were constructed in-situ by a mild solvothermal method in the existence of ionic liquid 1-butyl-3-methylimidazolium iodine ([PrMIm]I). The BiOI/Bi2SiO5 heterojunctions display flower-like nanostructure assembled by thin nanosheets. The diameter of the nanoflower is 500-800 nm, supported by transmission electron microscope (TEM). [PrMIm]I serves as a reactant and a soft template. Among all the catalysts prepared, the 3% BiOI/Bi(2)SiO(5 )heterojunction photocatalyst holds the highest photocatalytic performance toward abatement of methyl orange (MO), phenol and Cr (VI) under sunlight irradiation. Furthermore, the composites have excellent stability, proved by the cycle experiment of phenol degradation. Experimental results reveal that enhanced photocatalytic property is attributable to the larger specific surface area, effective separation of photogenerated charge pairs, and the construction of step-scheme heterojunctions. In addition, the photoinduced charge separation of BiOI/Bi2SiO5 heterojunctions obeys a step-scheme mechanism.
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