Synergetic effect of photocatalysis and peroxymonosulfate activated by MFe2O4 (M = Co,Mn, or Zn) for enhanced photocatalytic activity under visible light irradiation |
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| Authors: | Mingyang Long Di Li Hongmiao Li Xinguo Ma Qianqian Zhao Qi Wen Fang Song |
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| Affiliation: | School of Chemistry and Chemical Engineering, Xi''an University of Architecture and Technology, Xi''an 710055 China.; Instrument Analysis Center, Xi''an University of Architecture and Technology, Xi''an 710055 China ; School of Science, Hubei University of Technology, Wuhan 430068 China |
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| Abstract: | Nanosized MFe2O4 (M = Co, Mn, or Zn) photocatalysts were synthesized via a simple sol–gel method. MFe2O4 photocatalysts exhibited lower photocatalytic activity for the degradation of levofloxacin hydrochloride under visible light irradiation. For enhancement of photocatalytic activity, MFe2O4 was used to activate peroxymonosulfate and degrade levofloxacin hydrochloride under visible light irradiation. The influences of peroxymonosulfate dosage, levofloxacin hydrochloride concentration, pH value, and temperature on peroxymonosulfate activation to degrade levofloxacin hydrochloride were investigated in detail. The mechanism of activation of peroxymonosulfate by MFe2O4 was proposed and proved by radical quenching experiments, electron spin resonance analysis, X-ray photoelectron spectroscopy, electrochemical impedance spectroscopy, and transient photocurrent responses. The combined activation effects of photogenerated e−/h+ and transition metals on peroxymonosulfate to produce sulfate radical clearly enhanced the degradation efficiency.The combined activation effects of photogenerated e−/h+, Fe, Co, Mn, and Zn on peroxymonosulfate to produce SO4˙− clearly enhanced the degradation efficiency. |
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