首页|Magnetically recoverable flower-like Sn3O4/SnFe2O4 as a type-II heterojunction photocatalyst for efficient degradation of ciprofloxacin
Magnetically recoverable flower-like Sn3O4/SnFe2O4 as a type-II heterojunction photocatalyst for efficient degradation of ciprofloxacin
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NSTL
Elsevier
? 2022 Elsevier B.V.Photocatalysis is an important method for degradation of antibiotics. However, the rapid recombination of photoinduced carriers limits the photoactivity. In addition, due to the small particles size of photocatalyst, it is difficult to recycle, leading to secondary pollution to environment and limited practical application. In this work, the Sn3O4/SnFe2O4 (SN/SFO) heterojunction photocatalysts were synthesized by a simple ultrasonic assisted calcination method. The prepared SN/SFO composite was analyzed by X-ray diffraction, scanning electron microscopy, transmission electron microscopy and X-ray photoelectron spectroscopy. Their photocatalytic activities to ciprofloxacin (CIP) degradation were investigated under visible light. Among SN/SFO composites with different mass ratios, SN/SFO-25% composite showed the highest degradation efficiency, and the rate constant value of SN/SFO-25% is 4.87 and 3.02 times faster than pure SFO and SN, respectively. The improved photocatalytic performance of SN/SFO can be attributed to the construction of type II heterojunction, which inhibited the recombination of electron-hole pairs. In addition, the flower-like morphology causes many pores in the material and brings more exposed surface area, which favors, to some extent, multi-reflection, enhanced sunlight absorption and boosted photocatalytic reaction. More importantly, the SN/SFO composite was easy to be separated and recovered under the action of external magnetic field. This work is expected to provide design opportunities for the construction of highly efficient magnetic photocatalysts with type-II scheme for photocatalytic degradation of CIP in water environments.
Jiang X.、Wang M.、Luo B.、Yang Z.、Li W.、Zhang D.、Pu X.、Cai P.
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School of Materials Science and Engineering Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology Liaocheng University
College of Optical and Electronic Technology China Jiliang University
NSTL
Elsevier
