Abdelhamid Hani Nasser
Department of Materials and Environmental Chemistry, Stockholm University, Stockholm, SE-10691, Sweden. Advanced Multifunctional Materials Laboratory, Department of Chemistry, Assiut University, Assiut, 71515, Egypt.
Nanotechnology. 2019 Oct 25;30(43):435601. doi: 10.1088/1361-6528/ab30f6. Epub 2019 Jul 11.
Two-dimensional metal-organic frameworks show increasing research attention due to their unique properties including tunable thickness, simple packing into a film and membrane, and high surface-to-volume atom ratios. A bottom-up synthesis strategy using cetyltrimethylammonium bromide for the synthesis of copper-benzenedicarboxylate (Cu(BDC)) nanosheets is reported. The method offers the synthesis of hierarchical porous Cu(BDC) lamellae with micrometer lateral dimensions, and nanometer thickness (100-150 nm). Electron microscope (scanning and transmission), and N adsorption isotherms confirm the formation of lamellae Cu(BDC) with mesopore size of 5-80 nm. The material has thermal stability up to 400 °C with good chemical stability in several organic solvents. However, the material transforms to another phase (Cu(BDC)(HO)) when soaked in water and alcohols. The transformation reduces crystal size and offers the formation of hydrogen bond resulting in an increase in the sorption of CO by ∼10% compared to the pristine material Cu(BDC).
二维金属有机框架因其独特的性质而受到越来越多的研究关注，这些性质包括可调节的厚度、易于组装成薄膜和膜以及高的表面与体积原子比。本文报道了一种自下而上的合成策略，使用十六烷基三甲基溴化铵合成苯二甲酸铜（Cu(BDC)）纳米片。该方法能够合成具有微米级横向尺寸和纳米级厚度（100 - 150 nm）的分级多孔Cu(BDC)薄片。电子显微镜（扫描和透射）以及N吸附等温线证实了介孔尺寸为5 - 80 nm的片状Cu(BDC)的形成。该材料在高达400°C的温度下具有热稳定性，并且在几种有机溶剂中具有良好的化学稳定性。然而，当该材料浸泡在水和醇中时会转变为另一相（Cu(BDC)(HO)）。这种转变减小了晶体尺寸并形成了氢键，导致与原始材料Cu(BDC)相比，CO的吸附量增加了约10%。
