Enhancing water stability of MIL-101(Cr) by doping Ni(II)

作者：Qiu, Shuying; Wang, Yan^*; Wan, Jinquan; Han, Jinye; Ma, Yongwen; Wang, Silong

来源：Applied Surface Science, 2020, 525: 146511.

DOI：10.1016/j.apsusc.2020.146511

• Metal-organic frameworks
• MIL-101(Cr)
• Water stability
• Ni-doped
• Aqueous solution

Ni(II) ions doped MIL-101(Cr) metal organic framework materials were synthesized for the first time by pre-synthesis doping to improve their water stability. The samples were characterized by X-ray diffraction (XRD), infrared spectroscopy (IR), scanning electron microscopy (SEM), energy-dispersive spectroscopy instrument (EDS), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS) and N2 adsorption-desorption measurements, which persuasively demonstrated the effective combination of Ni(II) ions with the framework. The results showed that compared with undoped MIL-101(Cr), Ni-doped MIL-101(Cr) retained the original large specific surface area and pore size characteristics, and significantly improves the water stability of the skeleton. The water stability of Ni-doped MIL-101(Cr) in water environment with different pH has been significantly improved, which has important guiding significance for the application of MOFs in practical engineering.

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