Journal
SEPARATION AND PURIFICATION TECHNOLOGY
Volume 220, Issue -, Pages 78-88Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.seppur.2019.03.049
Keywords
Magnetic; Ag/CuNb2O6/CuFe2O4; Ternary heterojunction; Photodegradation
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Funding
- Shandong Province Natural Science Foundation, China [ZR2018MEM019]
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Development of efficient and easily recyclable photocatalysts has aroused wide attention. Herein, we synthesized Ag/CuNb2O6/CuFe2O4 ternary heterojunction composites as efficient and easily recyclable photocatalysts. The as-synthesized photocatalysts were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, UV-vis diffuse reflectance spectra, X-ray photoelectron spectroscopy and electrochemical measurements. Compared with CuNb2O6, Ag/CuNb2O6 and CuNb2O6/CuFe2O4, the Ag/CuNb2O6/CuFe2O4 exhibits improved photocatalytic activities of degradation methylene blue and imidacloprid under visible light irradiation. The excellent photocatalytic activity of the Ag/CuNb2O6/CuFe2O4 ternary heterojunction photocatalyst can be ascribed to the enhanced visible light absorbance region and the fast separation of photogenerated charges. It is notable that as-synthesized Ag/CuNb2O6/CuFe2O4 photocatalysts possess excellent magnetic recoverability under an external magnetic field. In addition, the photostability of Ag/CuNb2O6/CuFe2O4 was studied, and a plausible photocatalytic mechanism was proposed.
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