Method for preparing zeolitic imidazolate framework material (ZIF-8) nano-octa-tripod by using seed growth synthesis

A technology of ZIF-8 and zeolite imidazolate, which is applied in the field of preparation of ZIF-8 nano-octatripods, can solve the problems of difficulty in controlling the nucleation and growth stages, limiting the control and innovation of ZIF-8 morphology, and achieving shape The effect of precise control of appearance, multiple possibilities, and simple conditions

Active Publication Date: 2019-04-09
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, most of these methods are one-step synthesis methods, which are difficult to control dur

Method used

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  • Method for preparing zeolitic imidazolate framework material (ZIF-8) nano-octa-tripod by using seed growth synthesis
  • Method for preparing zeolitic imidazolate framework material (ZIF-8) nano-octa-tripod by using seed growth synthesis

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Embodiment 1

[0034] A method for using seed growth synthesis to prepare zeolite imidazolate framework material ZIF-8 nanometer eight tripods, comprising steps as follows:

[0035] (1) 1.37mmol zinc acetate, 13.6mmol 2-methylimidazole, 2.5μmol cetyltrimethylammonium bromide, and 10mL water were mixed and dissolved at room temperature, and the mixture was incubated at room temperature for 2 hours. The reaction solution was washed to obtain ZIF-8 truncated dodecahedral seeds, and dispersed in 10 mL of water to obtain a seed dispersion.

[0036] (2) Stir, mix and dissolve 96 μmol of zinc nitrate, 1.32 mmol of 2-methylimidazole, 1.44 μmol of cetyltrimethylammonium bromide, 200 μL of seed dispersion, and 3 mL of water at room temperature. After 3 hours at room temperature, the reaction solution was washed to obtain a ZIF-8 nano-octatripod product.

[0037] ZIF-8 nanometer eight tripod product scanning electron microscope (SEM) figure that the present embodiment makes, as figure 1 , 2 shown. ...

Embodiment 2

[0039] A method for using seed growth synthesis to prepare zeolite imidazolate framework material ZIF-8 nanometer eight tripods, comprising steps as follows:

[0040] (1) 1.37mmol zinc acetate, 13.6mmol 2-methylimidazole, 2.5μmol cetyltrimethylammonium bromide, and 10mL water were mixed and dissolved at room temperature, and the mixture was incubated at room temperature for 2 hours. The reaction solution was washed to obtain ZIF-8 truncated dodecahedral seeds, and dispersed in 10 mL of water to obtain a seed dispersion.

[0041] (2) Stir, mix and dissolve 96 μmol of zinc acetate, 1.32 mmol of 2-methylimidazole, 1.44 μmol of cetyltrimethylammonium bromide, 200 μL of seed dispersion, and 3 mL of water at room temperature. After 3 hours at room temperature, the reaction solution was washed to obtain a ZIF-8 nano-octatripod product.

Embodiment 3

[0043] A method for using seed growth synthesis to prepare zeolite imidazolate framework material ZIF-8 nanometer eight tripods, comprising steps as follows:

[0044] (1) 1.37mmol zinc acetate, 13.6mmol 2-methylimidazole, 2.5μmol cetyltrimethylammonium bromide, and 10mL water were mixed and dissolved at room temperature, and the mixture was incubated at room temperature for 2 hours. The reaction solution was washed to obtain ZIF-8 truncated dodecahedral seeds, and dispersed in 10 mL of water to obtain a seed dispersion.

[0045](2) Stir, mix and dissolve 96 μmol of zinc sulfate, 1.32 mmol of 2-methylimidazole, 1.44 μmol of cetyltrimethylammonium bromide, 200 μL of seed dispersion, and 3 mL of water at room temperature. After 3 hours at room temperature, the reaction solution was washed to obtain a ZIF-8 nano-octatripod product.

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Abstract

The invention relates to a method for preparing a zeolitic imidazolate framework material (ZIF-8) nano-octa-tripod by using seed growth synthesis. The method comprises the following steps of (1) mixing and dissolving a zinc salt, an imidazole ligand, a surfactant and water at room temperature, preserving heat of the mixture at room temperature for 1-4 hours, washing the mixture to obtain ZIF-8 truncated dodecahedral seeds, and then dispersing the seeds into water to obtain a seed dispersion liquid; and (2) stirring, mixing and dissolving the zinc salt, the imidazole ligand, the surfactant, theseed dispersion and a solvent at room temperature, and preserving heat of the mixture at room temperature for 1-12 hours, and washing the mixture to obtain the ZIF-8 nano-octa-tripod product. The nano-octa-tripod ZIF-8 synthesized by the invention breaks through the long-standing bottleneck of the ZIF-8 polyhedron morphology and provides more possibilities for the product morphology of ZIF-8.

Description

Technical field: [0001] The invention relates to a method for preparing a ZIF-8 nanometer eight-tripod, belonging to the technical field of crystal material synthesis. Background technique: [0002] Zeolitic imidazolate frameworks (ZIFs) are a class of metal-organic frameworks (MOFs) with a zeolite framework structure, in which the transition metals are mainly divalent Zn, Co, etc., and the organic ligands are imidazole or imidazole derivatives. Compared with traditional zeolites, transition metal ions replace Si elements and Al elements in traditional zeolites, and imidazolate replaces oxygen bridges in traditional zeolites, which is a zeolite-like structure material connected by nitrogen atoms on imidazole rings. . [0003] ZIF-8 is a kind of zeolite imidazolate framework material (ZIFs), which is composed of 2-methylimidazole and metal atom Zn as the most basic unit, in which each Zn atom is coordinated with four N atoms on the 2-methylimidazole ring bit, forming a ZnN ...

Claims

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Application Information

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IPC IPC(8): C08G83/00
CPCC08G83/008
Inventor 侯士峰布吉东
Owner SHANDONG UNIV
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