摘要
采用生物模板法制备分级多孔结构Ti O_2,再通过水热法制得Fe_3O_4/生物模板Ti O_2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Fe_3O_4/生物模板Ti O_2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Ti O_2和磁铁矿型Fe_3O_4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,Fe_3O_4/生物模板Ti O_2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。
The graded porous structure TiO_2was prepared by biological template method,and Fe_3O_4/biological template TiO_2composites were prepared by hydrothermal method.The materials were characterized by XRD,SEM,EDX and VSM.The performance and stability of Fe_3O_4/biological template TiO_2composites photo-Fenton degradation of tetracycline in water were investigated.It showed that the prepared composites consisted of anatase TiO_2and magnetite Fe_3O_4,with a saturation specific magnetization of 45.51 emu/g and excellent magnetic recovery property.When pH was 7,Fe_3O_4/biological template TiO_2photo-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.
引文
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