Fabrication and catalytic performances of glass fiber supported α-Fe2O3/CuFe2O4 heterojunction film
In order to overcome the disadvantages of the traditional Fenton catalyst,such as slow degradation rate,small pH range and difficulty in recovery,glass fiber supported α-Fe2O3/CuFe2O4 heterojunction films(FCGF)were pre-pared by dip coating sol-gel method.The structure,morphology,and chemical composition of FCCF were char-acterized.And FCGF was used for photocatalytic degradation of methylene blue(MB)by Fenton,investigating its catalytic activity,pH adaptability,and stability for repecdoed use.The results show that CuFe2O4 particles grow on the surface of α-Fe2O3 particles and form α-Fe2O3/CuFe2O4 heterojunction;under simulated solar radia-tion conditions,adding 2 g of FCGF and 20 mmol/L of H2O2,50 mL of MB solution with a concentration of 30 mg/L achieved a degradation rate of 97％after 40 min,while adding α-Fe2O3 and CuFe2O4 under the same condi-tions had a degradation rate of 20％and 30％,respectively.The enhanced catalytic activity could be attributed to the effective separation of photo generated carriers driven by the photo induced potential difference generated by heterojunction photocatalysts.At the same time,FCGF showed high activity in a wide pH range.At pH=10,the degradation efficiency of MB solution still reached 63％after 40 min.FCGF has good stability,and its catalytic performance does not deteriorate after 5 cycles,the degradation rate of MB can still reach 97％after reaction for 40 min.
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