铁基金属有机骨架材料制备工艺对其光催化性能的影响

Influence of different synthesis processes on photocatalytic properties of Fe-based metal-organic framework materials

以氯化铁和均苯三甲酸为原料,分别采用溶胶-凝胶法、恒温水浴法和水热法3种制备工艺合成了铁基金属有机骨架材料MIL-100(Fe)。通过X射线衍射(XRD)、红外光谱(FT-IR)、场发射扫描电镜(SEM)、固体紫外-可见吸收光谱(UV-Vis)、比表面积(BET)测试等方法对MIL-100(Fe)样品进行表征,讨论了3种制备工艺对MIL-100(Fe)样品晶相、形貌、结构的影响及其对罗丹明B光催化降解性能的影响。研究表明,高比表面积、强光吸收有利于MIL-100(Fe)吸附-催化性能的提高,水热法制备的MIL-100(Fe)较其他两种方法制备的样品具有更优异的净化性能。

Three Fe-based metal-organic frameworks MIL-100(Fe)were successfully fabricated with ferric chloride and trimesic acid as raw materials,by the sol-gel method,constant temperature water bath method and hydrothermal method,re-spectively.The morphology and structure of as-prepared MIL-100(Fe)were characterized by XRD,FTIR,SEM,UV-vis and BET.The influences of three preparation technologies on the phase,morphology,structure and photocatalytic degradation of Rhodamine B of as-prepared MIL-100(Fe)were also investigated.The results showed that the higher specific surface area and stronger light absorption were propitious to improve the performance of adsorption-photocatalysis of MIL-100(Fe).At last,MIL-100(Fe)prepared by hydrothermal method had more excellent purification performance compared with other two kinds of method.