Preparation and photocatalytic performance of amino-functionalized MIL-88b(Fe)
In order to improve the photocatalytic performance of MIL-88b(Fe),amino-functionalized MIL-88b(Fe)(NH2-MIL-88b(Fe))was prepared using amino-modified organic ligands.They were characterized systematically by X ray diffraction,scanning electron microscopy and diffuse reflectance spectroscopy.The results showed that the amino functionalization obviously reduced the band gap of the catalyst,which enhanced the visible-light absorption capacity and the separation efficiency of photogenerated electron-hole pairs.As the target pollutant,methylene blue(MB)was used to investigate the photocatalytic degradation performance.The photocatalytic degradation efficiency of MB by NH2-MIL-88b(Fe)was significantly higher compared with MIL-88b(Fe).After 180 min of reaction,the decolorization rate of MB reached 97％.Cycling experimental results showed that NH2-MIL-88b(Fe)possessed good stability.
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