期刊
OPTICAL MATERIALS
卷 122, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.optmat.2021.111726
关键词
Graphene; Heterostructure; Bismuth vanadate; Ciprofloxacin; Photodegradation
资金
- National Natural Science Foundation of China [22078028, 21978026]
- Changzhou Key Laboratory of Graphene-Based Materials for Environment and Safety [CM20153006, CE20185043]
A reduced graphene oxide (RGO) supported BiVO4/TiO2 nanocomposite with high efficiency for photocatalytic degradation of ciprofloxacin (CIP) under visible light was synthesized in this study. The optimized composite with 5% RGO content showed significantly improved degradation rate in acidic ambient and excellent photocatalytic stability. The outstanding photocatalytic efficiency was attributed to the effective electron transfer, as confirmed by mechanistic studies.
Y A reduced graphene oxide (RGO) supported BiVO4/TiO2 nanocomposite with remarkably high efficiency for the photocatalytic degradation of ciprofloxacin (CIP) under visible light is synthetized by a simple hydrothermal route. By rationally investigating the influence of RGO content and the pH value of the reaction solution, it is interestingly to uncover that the optimized BiVO4/TiO2/RGO composite with 5% RGO content could achieve a degradation rate of 80.5% within 150 min in the acidic ambient (pH = 5), which is 2.06 times higher than that of BiVO4/TiO2. Photoluminescence spectra (PL) analysis confirms that the recombination of TiO2 semiconductor and the introduction of RGO are essential to boosting the electron transfer and inhibiting the recombination of photo-generated carriers. Additionally, the as-obtained photocatalyst could display outstanding photocatalytic stability, which show negligible change in photodegradation efficiency after 5 cycles. Mechanistic studies reveal that the outstanding photodegradation efficiency is ascribed to the effective electron transfer.
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