研究目的
To improve the photocatalytic performance of BiOCl by constructing flower-like BiOBr/BiOCl heterojunctions using an ionic liquid assisted one-step hydrothermal method.
研究成果
Flower-like BiOBr/BiOCl heterojunctions with significantly enhanced photocatalytic performance were successfully constructed through a hydrothermal method with the assistance of [BPy]Br. The ionic liquid-assisted fabrication of heterojunctions is a prospective approach to promote the photocatalytic performance of BiOCl.
研究不足
The study focuses on the photocatalytic performance under simulated sunlight irradiation, and the practical application under natural sunlight conditions may require further investigation. The low content of BiOBr in the heterojunctions may limit the visible light absorption capability.
1：Experimental Design and Method Selection:
A one-step hydrothermal method assisted by N-ethylpyridinium bromide ([BPy]Br) was used to in-situ construct BiOBr/BiOCl heterojunctions.
2：Sample Selection and Data Sources:
Bi(NO3)3·5H2O and [BPy]Br were dissolved in acetic suspension system, followed by the addition of KCl aqueous solution.
3：List of Experimental Equipment and Materials:
SSA-4200 automatic surface analyzer, DX-2600 X-ray diffractometer, JSM-7500F SEM with EDS, Tecnai TEM G2 HRTEM, TU-1907 UV-vis spectrophotometer, homemade SPV apparatus, 500W Xe lamp.
4：Experimental Procedures and Operational Workflow:
The mixture was treated at 453 K for 24 h in a Teflon-lined autoclave, followed by centrifugal separation, washing, and drying.
5：Data Analysis Methods:
XRD for crystal phase analysis, SEM and HRTEM for microstructure study, UV-vis DRS for optical absorption, SPV for separation behavior of photoinduced carriers.
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