以Fe₃O₄为载体，采用溶胶-凝胶法制备酚醛树脂改性磁载TiO₂复合光催化剂，考察其太阳光催化降解苯酚的性能。探讨了Fe₃O₄和PF的负载量、焙烧温度、苯酚质量浓度、溶液的pH等对光催化降解苯酚活性的影响。通过FT-IR、XRD、SEM、UV-Vis等手段对复合光催化剂进行物相表征。结果表明，复合材料中TiO₂为锐钛矿相，PF改性和Fe₃O₄负载促进TiO₂可见光吸收。当苯酚质量浓度为10 mg/L、pH为6、太阳光照射180 min时，8% PF/5% Fe₃O₄/TiO₂（200℃、4 h）复合材料对苯酚的降解率为92.51%。Fe₃O₄的负载提高了各催化剂的磁回收性能。

Using Fe₃O₄ as carrier,phenol formaldehyde resin (PF) modified TiO₂ composite photocatalyst is prepared via sol-gel method,and its photocatalytic efficiency in phenol degradation is investigated.Influences of the loading amounts of Fe₃O₄ and PF,calcination temperature,phenol concentration and pH value on the performance of the catalyst in photocatalytic degradation of phenol are investigated.The composite photocatalyst is characterized by means of Fourier transform infrared spectroscopy (FT-IR),X-ray diffraction (XRD),scanning electron microscopy (SEM) and solid ultraviolet (UV-Vis).It is shown that TiO₂ exists with anatase phase in the composite,and the visible light absorption capacity of TiO₂ can be enhanced by PF modification and Fe₃O₄ loading.The degradation rate of phenol solution over 8% PF/5% Fe₃O₄/TiO₂ (200℃,4 h) can achieve 92.51% when the concentration of phenol is 10 mg·L^-1,pH is 6,and sunlight has irradiated for 180 min.The magnetic recovery performance of the catalysts is improved by Fe₃O₄ loading.

杨晓艳(1997-),女,本科生,研究方向为光催化,yang5xiaoyan@163.com