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- 2017
TiO2-Fe3O4/MIL-101（Cr）磁性复合光催化材料的制备及其光催化性能
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Abstract:
采用原位水热法合成了TiO2-Fe3O4/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Fe3O4和TiO2与MIL-101（Cr）结合成功，复合后的TiO2-Fe3O4/MIL-101（Cr）光催化材料的可见光响应范围得到明显拓宽；当TiO2的添加量为400 mg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120 min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 magnetic TiO2-Fe3O4/MIL(Material Institute Lavoisier)-101(Cr) composites were synthesized via in situ hydrothermal method. The structure and performance of composites were characterized by XRD, SEM, UV-Vis DRS, BET and superconducting magnet system. The photocatalytic activity of TiO2-Fe3O4/MIL-101(Cr) composites were investigated by photocatalytic degradation of MB solution, and the stability of TiO2-Fe3O4/MIL-101(Cr) composites was also studied. The results show that the thiohydroxy-modified-Fe3O4 and thiohydroxy-modified-TiO2, can be successfully combined with MIL-101(Cr), and a notable absorption extension in the visible-light region can be observed for the TiO2-Fe3O4/MIL-101(Cr) composites. The TiO2-Fe3O4/MIL-101(Cr)(400) composite exhibits the highest photocatalytic activity, while the corresponding photodegradation efficiency for MB is 80% after 120 min irradiation. The TiO2-Fe3O4/MIL-101(Cr) composites also have a good stability and can be easily separated from solution by an external magnet. 国家自然科学基金（21407026）；福建省杰出青年科学基金（2014J06005）；福州大学能源与环境光催化国家重点实验室自主课题基金（2014B02）
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