摘要：

采用生物模板法制备分级多孔结构TiO₂，再通过水热法制得Fe₃O₄/生物模板TiO₂复合材料。采用XRD、SEM、EDX、VSM等对制备的材料进行了表征，并考察了Fe₃O₄/生物模板TiO₂光催化-Fenton降解水中四环素的性能及稳定性。研究表明，制备的复合材料由锐钛矿型TiO₂和磁铁矿型Fe₃O₄组成，饱和比磁化强度为45.51 emu/g，具有优异的磁回收性能。当pH为7时，Fe₃O₄/生物模板TiO₂光催化-Fenton降解四环素的效果最佳，降解率为99.22%。复合材料重复使用7次后，四环素降解率仍达98.9%以上，具有较好的催化稳定性。

关键词: 生物模板法, 四环素, Fenton, 光催化, 磁性材料

Abstract:

The graded porous structure TiO₂ was prepared by biological template method, and Fe₃O₄/biological template TiO₂ composites were prepared by hydrothermal method. The materials were characterized by XRD, SEM, EDX and VSM. The performance and stability of Fe₃O₄/biological template TiO₂ composites photo-Fenton degradation of tetracycline in water were investigated. It showed that the prepared composites consisted of anatase TiO₂ and magnetite Fe₃O₄, with a saturation specific magnetization of 45.51 emu/g and excellent magnetic recovery property. When pH was 7, Fe₃O₄/biological template TiO₂ photo-Fenton degraded tetracycline with the best effect, and the degradation rate was 99.22%. After repeated use of the composite material for 7 times, the degradation rate of tetracycline was still above 98.9%. It showed that the composite had good catalytic stability.

Key words: biological template method, tetracycline, Fenton, photo-catalysis, magnetic material

中图分类号: 

• X703