Hierarchical Heteroaggregation of Binary Metal-Organic Gels with Tunable Porosity and Mixed Valence Metal Sites for Removal of Dyes in Water
Hierarchical Heteroaggregation of Binary Metal-Organic Gels with Tunable Porosity and Mixed Valence Metal Sites for Removal of Dyes in Water
复制标题
具有可调孔隙率和混合价金属位点的二元金属有机凝胶的多级异质聚集用于去除水中的染料
DOI：
10.1038/srep10556
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发表时间：
2015-05-27
影响因子：
4.6
通讯作者：
Zou, Ruqiang
中科院分区：
文献类型：
--
作者：
Mahmood, Asif;Xia, Wei;Zou, Ruqiang
首次采用简单的溶剂热法合成了以铁（Fe）和铝（Al）金属有机骨架（MOF）为骨架，三羧酸根为配体的多级结构的金属有机凝胶（MOG）。基于Fe或Al的单块MOG得到均匀的整料，其已经通过引入系统中的异质性（失配生长）来调整。所开发的凝胶表明，表面积，孔体积和孔径可以很容易地调整通过优化异质性。这项工作还阐述了非均匀性对MOG颗粒尺寸的影响，MOG颗粒的尺寸随着非均匀性的增加而大幅增加，并且在凝胶中获得混合价位。高的表面积（1861 m2/g）和孔体积（9.737 cc/g）的非均相凝胶（0.5Fe-0.5Al）。在中性和酸性介质中，染料分子的大吸收量（290 mg/g罗丹明B和265 mg/g甲基橙子）具有快速吸附动力学，显示出MOG通道（微孔和介孔/大孔）的良好稳定性和可及性，进一步证明了它们在催化和吸附大分子中的潜在应用。
Hierarchical heteronuclear metal-organic gels (MOGs) based on iron (Fe) and aluminium (Al) metal-organic framework (MOF) backbones bridged by tri-carboxylate ligands have firstly been synthesized by simple solvothermal method. Monometallic MOGs based on Fe or Al give homogenous monoliths, which have been tuned by introduction of heterogeneity in the system (mismatched growth). The developed gels demonstrate that surface areas, pore volumes and pore sizes can be readily tuned by optimizing heterogeneity. The work also elaborates effect of heterogeneity on size of MOG particles which increase substantially with increasing heterogeneity as well as obtaining mixed valence sites in the gels. High surface areas (1861 m2/g) and pore volumes (9.737 cc/g) were obtained for heterogeneous gels (0.5Fe-0.5Al). The large uptakes of dye molecules (290 mg/g rhodamine B and 265 mg/g methyl orange) with fast sorption kinetics in both neutral and acidic mediums show good stability and accessibility of MOG channels (micro and meso-/macropores), further demonstrating their potential applications in catalysis and sorption of large molecules.