Abstract

Porous composites based on a MIL-100(Fe) metal–organic framework and a natural diatomite material have been synthesized. The composites are characterized by a specific surface area of 322 and 441 m²/g and a hierarchical pore structure represented by wide pores of the original diatomite and narrow meso- and micropores of the formed MIL-100(Fe) particles. The effect of synthesis approach on the structure of the composites and their catalytic properties in the photocatalytic degradation of phenol has been studied. In the composite synthesized with the preimpregnation of diatomite with an iron nitrate solution, MIL-100(Fe) particles are mostly formed inside the diatomite pores. The composite samples exhibit catalytic activity in the photo-Fenton degradation of phenol. The highest activity is exhibited by the sample synthesized without any preimpregnation of diatomite; this sample is characterized by the dominant formation of MIL-100(Fe) particles on the external surface of the diatomite.

中文翻译：

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基于 MIL-100(Fe) 和硅藻土的复合材料用于光芬顿降解苯酚

摘要

合成了基于 MIL-100(Fe) 金属有机骨架和天然硅藻土材料的多孔复合材料。该复合材料的特点是比表面积分别为 322 和 441 m ²/g 以及由原始硅藻土的宽孔和形成的 MIL-100(Fe) 颗粒的窄介孔和微孔代表的分级孔结构。研究了合成方法对复合材料结构的影响及其光催化降解苯酚的催化性能。在用硝酸铁溶液预浸渍硅藻土合成的复合材料中，MIL-100(Fe)颗粒主要在硅藻土孔隙内形成。复合样品在苯酚的光芬顿降解中表现出催化活性。在没有任何硅藻土预浸渍的情况下合成的样品表现出最高的活性；该样品的特点是在硅藻土的外表面上主要形成 MIL-100(Fe) 颗粒。