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采用原位水热法合成了TiO_2-Fe_3O_4/MIL-101(Cr)磁性复合光催化材料,利用XRD、SEM、UV-Vis DRS、BET和磁学测量系统对复合光催化材料的结构和性能进行了表征,并以亚甲基蓝(MB)为模拟污染物,研究了该复合光催化材料的可见光催化活性,并考察了光催化材料的稳定性。结果表明:巯基官能化的Fe_3O_4和TiO_2与MIL-101(Cr)结合成功,复合后的TiO_2-Fe_3O_4/MIL-101(Cr)光催化材料的可见光响应范围得到明显拓宽;当TiO_2的添加量为400mg时所制得的磁性复合光催化材料具有相对较好的光催化降解效果,经过120min光照后,对MB的去除率高达80%;该磁性复合光催化材料具有良好的稳定性和磁分离性能。
The structure and properties of the composite photocatalysts were characterized by XRD, SEM, UV-Vis DRS, BET and magnetic measurement system. The photocatalytic materials of TiO_2-Fe_3O_4 / MIL-101 (MB) as a simulated pollutant, the photocatalytic activity of the composite photocatalytic material was studied, and the stability of the photocatalytic material was also investigated. The results show that the visible light response range of TiO 2 -Fe 3O 4 / MIL-101 (Cr) photocatalyst synthesized by mercapto-functionalized Fe 3 O 4 and TiO 2 is successfully broadened when combined with MIL-101 (Cr) 400mg when the magnetic composite photocatalytic material prepared has a relatively good photocatalytic degradation, after 120min light, the MB removal efficiency up to 80%; the magnetic composite photocatalytic material has good stability and magnetic separation performance .