通过插入铈和氟化化合物来提高纳米沸石中氧含量的简易途径。
A Facile Route toward the Increase of Oxygen Content in Nanosized Zeolite by Insertion of Cerium and Fluorinated Compounds.
机构信息
Laboratoire Catalyse et Spectrochimie, Normandie University, ENSICAEN, UNICAEN, CNRS, 14050 Caen, France.
ISTCT/CERVOxy Group, Normandie University, UNICAEN, CEA, CNRS, 14050 Caen, France.
出版信息
Molecules. 2018 Jan 24;23(2):37. doi: 10.3390/molecules23020037.
Enriching oxygen content within nanosized zeolite X (as synthesized Na-X) by insertion of cerium (ion exchanged Ce-X) and functionalization with bromoperfluoro--octane (fluorinated F-X) is reported. The materials were fully characterized by powder X-ray diffraction (XRD), dynamic light scattering (DLS), zeta potential, thermogravimetric analysis (TGA), nitrogen adsorption, and nuclear magnetic resonance (F NMR). The O₂ adsorption in the zeolite samples at various concentrations (0 to 165 Torr) at -196 °C was studied by in situ FTIR. The modification of nanosized zeolites did not alter their colloidal stability, crystallinity, porosity, and particle size distribution. The inclusion of cerium and bromoperfluoro--octane considerably increase the oxygen capacity by 33% for samples Ce-X and F-X in comparison to the as-synthesized Na-X zeolite. Further, toxicity tests revealed that these materials are safe, which opens the door for their implementation in medical applications, where controlled delivery of oxygen is highly desirable.
通过嵌入铈（离子交换 Ce-X）和用全氟溴代辛烷（氟化 F-X）官能化，报告了纳米沸石 X（合成 Na-X）中氧含量的富集。通过粉末 X 射线衍射（XRD）、动态光散射（DLS）、动电电位、热重分析（TGA）、氮气吸附和核磁共振（F NMR）对材料进行了全面表征。通过原位 FTIR 研究了沸石样品在不同浓度（0 至 165 托）和-196°C 下的 O₂吸附。纳米沸石的修饰没有改变其胶体稳定性、结晶度、孔隙率和颗粒尺寸分布。与合成的 Na-X 沸石相比，铈和全氟溴代辛烷的包含使 Ce-X 和 F-X 样品的氧容量增加了 33%。此外，毒性测试表明这些材料是安全的，这为它们在医疗应用中的实施开辟了道路，在医疗应用中，控制氧气的输送是非常理想的。
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