engleski

Preparation of Nanocrystalline Lanthanide-Based Metal-Organic Frameworks and their Derivatives

Metal-organic frameworks (MOFs) are a type of porous materials built from metal cations coordinated by organic ligands, the so-called linkers, in the form of one-, two- or three- dimensional structures. Due to the large specific surface area of MOFs and the ability to easily release and accept electrons from lanthanide metals, they have potential applications in electrocatalysis, photocatalysis [1], and gas storage [2]. In this research, nanocrystalline succinate MOFs based on lanthanides La, Ce, and Pr were synthesized. The synthesis was carried out via the solvothermal method, in which a mixture of DMF and water was used. The structure of the obtained crystals was characterized using Fourier transform infrared spectroscopy (FTIR), powder X- ray diffraction (PXRD), and thermogravimetric analysis (TGA) coupled with differential scanning calorimetry (DSC). Morphology was determined using scanning electron microscopy (SEM). Pyrolysis of the obtained MOFs in the oxidative and inert atmosphere was monitored in situ by TGA/DSC, and residues were characterized by PXRD. Performed analyses revealed nanocrystalline rod-like nanostructures which could be used directly in catalysis or as storage materials. Synthesized MOFs are also suitable for application as precursors for the synthesis of shape-controlled lanthanide oxides and lanthanide-doped carbon nanostructures.

metal-organic framework ; lanthanides ; nanorods ; photocatalysis

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