新型的氨基稀土金属有机骨架材料的制备及光催化降解有机染料研究

Study on preparation of new type amino Y-MOF material and photocatalytic degradation of organic dyes

以稀土Y离子和氨基化芳香共轭四羧酸反应得到一种新型稀土金属有机骨架材料Y-MOF,并用于对水中的有机染料光催化降解。选择了阳离子染料亚甲基蓝(MB)、结晶紫(CV)、罗丹明B(RhB),阴离子染料亚甲基橙(MO)和中性染料中性红(NR)作为光催化降解对象,得到光照降解效率分别达到了94%、87%、42%、95%和94%。研究表明Y-MOF对不同离子类型的有机染料均具有降解效果,且染料分子尺寸对催化效率影响较大,小分子染料MB、CV、MO和NR的降解效率较高,受限于较大的分子尺寸,RhB的降解效率最低。

A novel rare earth metal-organic framework(Y-MOF)material was prepared by the reaction of rare earth Y ions and aminated aromatic conjugated tetracarboxylic acid,and used for photocatalytic degradation of organic dyes in water.In the experiment,cationic dyes methylene blue(MB),crystal violet(CV),Rhodamine B(RhB),anionic dye methylene orange(MO)and neutral dye neutral red(NR)were selected as the photocatalytic degradation objects.The photodegradation efficiency reached 94%,87%,42%,95%and 94%,respectively.The results shown that Y-MOF had degradation effect on organic dyes bearing different ion types,and the molecular sizes of the dyes had greater impact on the catalytic efficiency.The degradation efficiency of the small molecule dyes MB,CV,MO,and NR was relatively high,RhB had the lowest degradation efficiency due to the large molecular size.