Fe_3O_4/生物模板TiO_2复合材料光-Fenton氧化水中四环素
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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.
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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[2]杨运平,唐金晶,方芳,等. UV/TiO2/Fenton光催化氧化垃圾渗滤液的研究[J].中国给水排水,2006,22(7):34-37.
[3]王玉峰.非均相Fenton氧化技术处理造纸废水的研究[D].广州:华南理工大学,2014.
[4]白翠萍.类Fenton高级氧化技术处理染料废水的研究[D].武汉:武汉理工大学,2012.
[5]林婵. TiO2纳米材料的制备、改性及其光催化性能研究[D].青岛:中国海洋大学,2014.
[6]王芬,赵宝秀,李想,等. Fenton试剂协同TiO2光催化降解三氯乙酸及协同机理[J].环境工程学报,2015,9(9):4153-4158.
[7]Wang Chencheng,Chen Feng,Tang Yuanzheng,et al. Advanced visible-light photocatalytic property of biologically structured carbon/ceria hybrid multilayer membranes prepared by bamboo leaves[J].Ceramics International,2018,44(6):5834-5841.
[8]张理元,曹阳,刘钟馨,等.氮掺杂二氧化钛纳米管的制备及表征[J].稀有金属,2011,35(4):504-509.
[9]任爱玲,刘卉,张硕,等. Ce-Mn/ZSM-5催化剂的制备及其低温脱硝性能分析[J].现代化工,2018(6):73-77.
[10]李爽,张兰英,王显胜,等.二氧化钛光催化降解地下水中的六六六[J].吉林大学学报:理学版,2007,45(1):153-157.
[11]康春莉,冯淑霞,郭平,等.模拟太阳光条件下草酸钠-Fenton试剂降解苯酚[J].吉林大学学报:理学版,2006,44(4):658-662.
[12]景伟文,包晓玮,陈燕勤,等.用光助Fenton体系降解邻苯二甲酸二甲酯[J].吉林大学学报:理学版,2011,49(2):358-362.
[13]赵学坤.有机污染物的光助Fenton法氧化降解及其在海洋沉积物上的吸附行为研究[D].青岛:中国海洋大学,2004.