Method for preparing mixed-valent-state iron doped zeolite imidazate skeleton nano-material

Abstract

The invention relates to a method for preparing a mixed-valent-state iron doped zeolite imidazate skeleton nano-material. The method comprises the steps of simultaneously dispersing bivalent and trivalent iron salts and zinc nitrate into a methanol solvent to form an iron-zinc precursor solution, mixing a 2-methylimidazole methanol solution with the precursor solution, placing the mixture in an oil bath with the temperature of 40 DEG C to 100 DEG C, carrying out a sustained magnetic stirring reaction, and then, subjecting a product to centrifugation, washing and drying treatment, thereby obtaining the mixed-valent-state iron doped zeolite imidazate skeleton nano-material. The mixed-valent-state iron doped zeolite imidazate skeleton nano-material with relatively high yield and uniform and controllable particle size is obtained. According to the method disclosed by the invention, the total iron doped amount can reach 50% to the maximum through adjusting a ratio of bivalent iron salts totrivalent iron salts, and conversion ratios of zinc ions and iron ions can separately reach up to 78% and 60%. The method is simple and economical, and reacted mother liquor can be reused. The obtained nano-material has a relatively high active oxygen generating efficiency under ultrasonic induction, has a tremendous application value in degradation of environmental pollutants and sonodynamic therapy of tumors and can be applied to preparation of high-concentration monoatomic iron-carbon based catalysts.

Description

Technical field: [0001] The invention belongs to the technical field of functional nanometer materials, and in particular relates to a preparation method of mixed valence iron doped metal organic framework nanomaterials. Background technique: [0002] Metal-organic frameworks (MOFs) are porous materials with a three-dimensional spatial network structure formed by transition metal ions and organic ligands through coordination self-assembly, and the formed porous structure materials exhibit unique physical properties of nanomaterials at the nanoscale. Chemical properties (such as controllable size, large specific surface area, high chemical stability, etc.). In particular, using the space confinement effect of metal-organic frameworks, transition metal single-atom carbon-based nanomaterials with high catalytic activity can be prepared under high-temperature pyrolysis conditions, showing broad applications in the fields of energy, catalysis, and biomedicine. Value. For exampl...

AI Technical Summary

Problems solved by technology

However, the simple and economical preparation methods of mixed-valence iron-centered bimetallic zeolite imidazole framework materials based on specific nitrogen-containing imidazole ligands are rarely reported, and it is difficult to control the concentration of iron ions participating in the coordination.

Therefore, there are still great challenges in preparing ZIF-8 nanoparticles doped with mixed valence metal iron ions.

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