金属基氧阴离子是潜在的有毒污染物,可能导致严重的水污染。因此,这种物种的隔离最近受到了重要的研究关注。尽管几种吸附剂已被用于化学品的有效管理,它们有限的微孔性质以及非整体适用性阻碍了它们的大规模实时应用。在这里,我们开发了一种独特的阴离子可交换杂化复合气凝胶材料(IPcomp-6),将稳定的阳离子金属有机多面体与分层多孔金属有机凝胶整合在一起。复合清除剂对各种有害的含氧阴离子表现出高度选择性和非常快的分离效率,例如,HAsO42-,SeO42-,ReO4-,CrO42-,MnO4-,在水中,在存在100倍过量的其他共存阴离子的情况下。该材料能够选择性地消除痕量HAsO42-,即使浓度很低,远低于WHO定义的饮用水中的AsV限值。
Metal-based oxoanions are potentially toxic pollutants that can cause serious water pollution. Therefore, the segregation of such species has recently received significant research attention. Even though several adsorbents have been employed for effective management of chemicals, their limited microporous nature along with non-monolithic applicability has thwarted their large-scale real-time application. Herein, we developed a unique anion exchangeable hybrid composite aerogel material (IPcomp-6), integrating a stable cationic metal-organic polyhedron with a hierarchically porous metal-organic gel. The composite scavenger demonstrated a highly selective and very fast segregation efficiency for various hazardous oxoanions such as, HAsO4 2- , SeO4 2- , ReO4 - , CrO4 2- , MnO4 - , in water, in the presence of 100-fold excess of other coexisting anions. The material was able to selectively eliminate trace HAsO4 2- even at low concentration to well below the AsV limit in drinking water defined by WHO.