Department of Chemistry and Green-Nano Materials Research Center, Kyungpook National University , Daegu 702-701, Korea.
Inorg Chem. 2013 Dec 16;52(24):14155-61. doi: 10.1021/ic402012d. Epub 2013 Dec 3.
A highly porous metal-organic framework (MOF), MIL-101 (Cr-benzenedicarboxylate), was synthesized in the presence of graphite oxide (GO) to produce GO/MIL-101 composites. The porosity of the composites increased remarkably in the presence of a small amount of GO (<0.5% of MIL-101); however, further increases in GO reduced the porosity. GO also accelerated the synthesis of the MIL-101. The composites (GO/MIL-101) were used, for the first time, in liquid-phase adsorptions. The adsorptive removal of nitrogen-containing compounds (NCCs) and sulfur-containing compounds (SCCs) from model fuels demonstrated the potential applications of the composites in adsorptions, and the adsorption capacity was dependent on the surface area and pore volume of the composites. Most importantly, the GO/MIL-101 composite has the highest adsorption capacity for NCCs among reported adsorbents so far, partly because of the increased porosity of the composite. Finally, the results suggest that GO could be used in the synthesis of highly porous MOF composites, and the obtained materials could be used in various adsorptions in both liquid and gas/vapor phase (such as H2, CH4, and CO2 storage) adsorptions, because of the high porosity and functional GO.
一种高多孔的金属有机骨架（MOF），MIL-101（苯二甲酸根合铬），在氧化石墨（GO）的存在下合成，以产生 GO/MIL-101 复合材料。在少量 GO（MIL-101 的 0.5%以下）存在下，复合材料的孔隙率显著增加；然而，GO 的进一步增加降低了孔隙率。GO 还加速了 MIL-101 的合成。首次将复合材料（GO/MIL-101）用于液相吸附。模型燃料中含氮化合物（NCC）和含硫化合物（SCC）的吸附去除证明了复合材料在吸附中的潜在应用，吸附容量取决于复合材料的比表面积和孔体积。最重要的是，GO/MIL-101 复合材料对 NCCs 的吸附容量是迄今为止报道的吸附剂中最高的，部分原因是复合材料的孔隙率增加。最后，结果表明，GO 可用于合成高多孔 MOF 复合材料，所得材料可用于液体和气体/蒸气相（如 H2、CH4 和 CO2 储存）吸附中的各种吸附，因为其具有高孔隙率和功能化的 GO。
