Metastable Zirconium Phosphate under Nanoconfinement with Superior Adsorption Capability for Water Treatment
Metastable Zirconium Phosphate under Nanoconfinement with Superior Adsorption Capability for Water Treatment
复制标题
DOI：
10.1002/adfm.201909014
复制
发表时间：
2020-02
影响因子：
19
通讯作者：
Xiaolin Zhang;J. Shen;Siyuan Pan;Jieshu Qian;B. Pan
中科院分区：
文献类型：
--
作者：
Xiaolin Zhang;J. Shen;Siyuan Pan;Jieshu Qian;B. Pan
在几纳米长度的有限空间中，物质的相行为，例如成核和结晶，与本体中的类似物完全不同。然而，在环境应用中，无机晶体的纳米结晶行为与其污染物去除性能之间的关系很少得到阐明。在此，报道了在介孔聚苯乙烯（MPS）的 7.9 nm 孔纳米限制内形成了一种不寻常的磷酸锆（ZrP）晶体，它是热力学稳定的 α 相和亚稳态 γ 相的混合物。因此，这改变了 ZrP 与有毒金属阳离子之间的相互作用，从普通 α-ZrP 的非特异性静电吸引转变为纳米限制 γ-ZrP 的高度特异性内球配位，其表现出显着的反应活性以及去除有毒金属的可重复使用性。这项研究的结果有助于更好地理解纳米限制在材料性能调节中的应用。
In confined space with length scale of several nanometers, the phase behavior of matter, e.g., nucleation and crystallization, is completely different from its analogue in bulk. However, in environmental applications, the relationship between the nanoconfined crystallization behavior of inorganic crystals and their properties for pollutant removal is rarely elucidated. Herein, an unusual formation of zirconium phosphate (ZrP) crystals as a mixture of both thermodynamically stable α‐ and metastable γ‐phases inside the nanoconfinement of 7.9 nm pores of mesoporous polystyrene (MPS) is reported. This consequently changes the interaction between ZrP and toxic metal cations from nonspecific electrostatic attraction of normal α‐ZrP to highly specific inner‐sphere coordination of nanoconfined γ‐ZrP, which exhibits remarkable reactivity as well as reusability for the removal of toxic metals. The results of this study contribute to a better understanding of the use of nanoconfinement for the regulation of material properties.