磁性分子筛负载TiO2复合光催化剂的制备及性能

采用超声辅助水热法合成了磁性分子筛Fe₃O₄/SSZ-13,然后通过溶胶-凝胶法对其继续负载TiO₂制得复合光催化剂TiO₂-Fe₃O₄/SSZ-13。借助XRD,FTIR,SEM,TEM,VSM,UV-Vis,PL对其形貌、结构及性能进行了表征,并考察了其光催化性能。表征结果表明,Fe₃O₄的加入不会改变分子筛的原有结构,复合材料的光响应范围扩大,电荷分离效率提高。降解实验结果表明,光照40 min时活性艳红的去除率可达89.7%,光照60 min时活性艳红去除率可达最大（93.6%）,较TiO₂提高了5.7%。此外,这种材料还具有较强的磁性,饱和磁化强度为17.80 （A·m²）/kg,可通过外加磁场回收。

Preparation and properties of TiO2 loaded magnetic zeolites composite photocatalyst

The magnetic zeolite Fe₃O₄/SSZ-13 was synthesized by ultrasonic-assisted hydrothermal method,and then TiO₂ was loaded on it by sol-gel method to prepare composite photocatalyst TiO₂-Fe₃O₄/SSZ-13. The morphology,structure and properties were characterized by XRD,FTIR,SEM,TEM,VSM,UV-Vis and PL,and the photocatalytic performance was investigated. The characterization results show that the addition of Fe₃O₄ can expand the photoresponse range of the composite material and improve the efficiency of charge separation without change the original structure of zeolite. The degradation experiment results show that the removal rate of Reactive Brilliant Red by the composite photocatalyst reaches 89.7% after 40 min of lighting and reached the maximum （93.6%） after 60 min of lighting,which is 5.7% higher than that on TiO₂. In addition,this material also has strong magnetic properties with a saturation magnetization of 17.80 （A·m²）/kg,which can be recovered by an external magnetic field.