具有高气态碘吸附的二维介孔共价有机框架

合成了一种新型的二维介孔共价有机框架(COF)材料JUC-573. 粉末X射线衍射、 氮气吸附-脱附和热重等表征结果表明合成的COF材料具有高结晶度、 高比表面积以及良好的热稳定性. 在333 K、 常压条件下, 该材料表现出优异的碘吸附能力, 且吸附量高达4.15 g/g. 这是由于在JUC-573中规则定向的垂直一维介孔孔道能够有效地避免碘吸附后的堵塞, 从而优化了材料的吸附能力. JUC-573可多次循环用于气态碘的捕获且保持几乎不变的吸附量.

2D Mesoporous Covalent Organic Framework with High Iodine Capture Capability

As a typical contaminant of nuclear waste， the research and development of iodine-capture materials has been great concern and challenge. Here， a novel two-dimensional mesoporous covalent organic framework（JUC-573） was reported. Powder X-ray diffraction， nitrogen adsorption and desorption isotherm， TGA and other characterizations indicated that the synthesized covalent organic frameworks（COFs） has high crystallinity， high specific surface area and good thermal stability. Under 333 K and ambient pressure， JUC-573 exhibited a good adsorption capacity to iodine vapor， and high adsorption capacity was up to 4.15 g/g. The regular 1D mesoporous vertical channel in JUC-573 can effectively avoid the blockage after iodine adsorption， thus optimizing the adsorption capacity of material. In addition， JUC-573 can be reused at least 5 times and retains its crystallinity.