一种铜金属-有机框架的合成及其高效去除水中Cr_(2)O_(7)^(2-)的研究

Synthesis of a Cu-based metal-organic frameworkfor removal of Cr_(2)O_(7)^(2-)from water

随着人类活动范围的扩张和现代工业的飞速发展,水污染日益严峻.借助多孔材料的吸附或离子交换作用去除废水中Cr6+,被认为是切实有效的.然而,传统孔材料通常比表面积较低、表面修饰存在一定困难,性能不够理想.由于丰富的孔隙和超高表面积,水稳定的MOFs可以选择性地高效吸附空气和水中的有毒污染物.文中在溶剂热条件下合成了一种具有低成本、较好稳定性的微孔MOF材料[Cu_(3)(btr)_(2)(hpztr)·(pztr^(-1))·(NO_(3)^(-))_(2)]n.实验研究显示,该材料能够在常温常压下有效富集水中的Cr_(2)O_(7)^(2-),且具有较高的吸附速率和吸附容量.

With the expansion of human′s activity sphere and the rapid development of modern industry,the problem of water pollution is becoming increasingly serious.Adsorption or ion exchange of porous materials can achieve effective removal of Cr 6+from wastewater.However,due to the low specific surface area and difficulty in surface modification,the performance of traditional porous materials is not ideal.Water-stabilized MOFs can selectively and efficiently adsorb toxic pollutants from air and water owing to their abundant pores and ultra-high surface area.In this work,a kind of microporous MOF material with low cost and good stability was synthesized under solvothermal condition.Experimental results show that the material can effectively enrich Cr_(2)O_(7)^(2-)from water with a high adsorption rate and high capacity at room temperature and pressure.