Department of Chemistry , Texas A&M University , College Station , Texas 77843 , United States.
Department of Applied Physics and Applied Mathematics , Columbia University , New York , New York 10027 , United States.
Inorg Chem. 2019 Oct 21;58(20):14260-14274. doi: 10.1021/acs.inorgchem.9b02442. Epub 2019 Oct 7.
We show how the structural order of nanocrystalline zirconium phosphates (ZrP) is tuned by the synthetic methods and conditions through the use of synchrotron X-ray atomic pair distribution function analysis. With different synthetic route and different phosphoric acid concentrations in the synthesis, the product zirconium phosphates vary from turbostratically disordered nanoscale structures to fully ordered ones. We show that a change in the structural order leads to different ion-exchange properties. The samples are characterized using multiple techniques, including powder X-ray diffraction, ion exchange, thermogravimetric analysis, transmission electron microscopy, fast neutron activation analysis, solid-state NMR spectroscopy, IR spectroscopy, and X-ray photoelectron spectroscopy.
我们通过使用同步加速器 X 射线原子对分布函数分析，展示了纳米晶磷酸锆（ZrP）的结构有序性如何通过合成方法和条件进行调节。通过不同的合成路线和不同的磷酸浓度在合成中，得到的磷酸锆产物从无规纳米结构到完全有序结构。我们表明，结构有序性的变化导致不同的离子交换性质。通过多种技术对样品进行了表征，包括粉末 X 射线衍射、离子交换、热重分析、透射电子显微镜、快中子活化分析、固态 NMR 光谱学、红外光谱学和 X 射线光电子能谱学。
