提出了一种简单而有效的重建被甲醇降解的对苯二甲酸铜(CuBDC)金属有机骨架材料的方法,只需溶剂辅助一步可实现CuBDC的重建。将CuBDC浸泡在甲醇溶液中使其降解,再用N,N-二甲基甲酰胺(DMF)重建,重建CuBDC孔隙率达到新制的94%,通过CO2和环氧化合物的环加成反应评价重建CuBDC的催化性能,重建 CuBDC的转化率和产率分别达到新制的97.8%和97.6%,实现了高度重建的目标,并具有良好的循环使用性能。利用扫描电子显微镜、X射线衍射仪、静态氮气吸附仪、热失重分析仪和傅里叶红外变换光谱仪等仪器表征,探讨了CuBDC降解-重建的机理。
A simple and effective method for the reconstruction of copper terephthalate (CuBDC)metal-organic framework material degraded by methanol was proposed and could achieve the reconstruction of CuBDC in only one-step solvent-mediated.CuBDC was immersed into methanol solution to be degraded and then reconstructed with DMF.The porosity of reconstructed CuBDC achieved 94% of fresh samples.The catalytic properties of CuBDC were evaluated by the cyclic addition reaction of CO2 and epoxy compounds.It was found that the conversion and yield of reconstructed CuBDC were 97.8% and 97.6% of fresh samples,respectively.It achieved the goal of high reconstruction with good recycling performance.The mechanism of degradation-reconstruction was investigated by electron microscopy,X-ray diffraction and structural analysis,static N2 adsorption device,thermogravimetric mass spectrometry and Fourier infrared spectroscopy.
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基金资助
国家自然科学基金(22072163、21761132010、91645114和21805029);中央高校基本科研业务费专项资金(N180705004和N2005007);中国博士后科学基金项目(2020M670773);超分子结构与材料国家重点实验室开放项目(sklssm202104、sklssm2021023和klssm2021035);宁夏自然科学基金项目(2022AAC03342和2022AAC03343)
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