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A kind of preparation method of 2-methylimidazolium zinc complex with hierarchical pore structure
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A technology of methylimidazole zinc and hierarchical pores, which is applied in the field of preparation of 2-methylimidazolium zinc complexes, can solve problems such as limited applications, and achieve the effects of simple preparation methods, large adsorption capacity, and enhanced diffusion
Inactive Publication Date: 2018-08-31
NANKAI UNIV
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[0002] Metal-organic frameworks (MOFs) are widely used in the fields of catalysis, fluorescence, and gas adsorption due to their adjustable composition and pores. However, the pore size of most MOFs is less than 2nm, and some larger molecules cannot enter the interior of the channel. , which limits its application to
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Embodiment 1
[0024] A kind of preparation method of the 2-methylimidazole zinc complex with hierarchical pore structure, the steps are as follows:
[0025] 1) Preparation of aligned soluble polystyrene microsphere templates
[0026] Mix 54mL styrene, 6mL methacrylic acid and 450mL water uniformly at 80°C to obtain solution c; dissolve 0.6g potassium persulfate in 30mL water to obtain solution d; add solution d to solution c and keep stirring for 24 hours After centrifugation, the white solid obtained was washed three times with water and ethanol respectively, and then the solid was dispersed with a mixture of water and ethanol at a volume ratio of 1:1 to form a suspension, and the supernatant was removed by centrifugation at 4000r / min, and the solid Dried to obtain a template of aligned soluble polystyrene microspheres.
[0027] 2) Using 0.2 g of arranged soluble polystyrene microspheres as a template, stir and mix with 58 mL of methanol core 1.311 g of 2-methylimidazole to obtain solutio...
Embodiment 2
[0030] The prepared 2-methylimidazole zinc complex with hierarchical pore structure is used to adsorb ethanol, and the method is as follows:
[0031] Take one vial and weigh the mass of the empty bottle (M 空 ), weighed the 2-methylimidazole zinc complex (M 样品 ) into the vial, then add 1mL of ethanol and mix thoroughly, suck out the unadsorbed ethanol after 5 minutes and weigh the total mass of the vial and the sample (M 总 ), and then use the formula (M 总 -M 空 -M 样品 ) / M 样品 Calculate the amount of ethanol adsorbed by the sample.
[0032] According to the same method as above, the prepared 2-methylimidazolium zinc complexes with hierarchical pore structure were used to adsorb methanol, ethanol, n-hexane, n-pentane, toluene, benzene, methylene chloride, petroleum ether, methylene chloride, etc. Silicone oil and vegetable oil.
[0033] figure 1 It is the X-ray powder diffraction pattern of the 2-methylimidazolium zinc complex with hierarchical pore structure, showing that i...
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Abstract
A preparation method of a 2-methylimidazole and zinc complex with a hierarchical porous structure comprises the following steps: 1, mixing arranged soluble polystyrene microspheres adopted as a template with methanol and 2-methylimidazole, and stirring to obtain a solution a; and 2, dissolving zinc nitrate hydrate in methanol to obtain a solution b, adding the solution b to the solution a in a dropwise manner 5min later, stirring the solution a and the solution b at room temperature for 24h, centrifuging the obtained solution mixture, washing the obtained material to obtain a white solid, and removing the arranged soluble polystyrene microsphere template at 80DEG C by using N,N-dimethyl formamide or toluene to obtain the 2-methylimidazole and zinc complex with a hierarchical porous structure. The preparation method has the advantages of simplicity, wide sources of raw materials, low cost and easy industrial amplified production; and the above material finally prepared through the method has the advantages of high specific surface area, facilitation of enhancement of the hydrophobicity and diffusion of organic solvents due to macro-pores, meso-pores and micro-pores, large adsorption quantity of the organic solvents, and certain hydrophobicity.
Description
technical field [0001] The invention relates to a hydrophobic organic solvent adsorption material, in particular to a preparation method and application of a 2-methylimidazole zinc complex with a hierarchical pore structure. Background technique [0002] Metal-organic frameworks (MOFs) are widely used in the fields of catalysis, fluorescence, and gas adsorption due to their adjustable composition and pores. However, the pore size of most MOFs is less than 2nm, and some larger molecules cannot enter the interior of the channel. , limiting its related applications. [0003] Synthesizing MOFs with a hierarchical porous structure at the mesoscopic scale makes them have micropores, mesopores and macropores at the same time, which can improve the permeability of MOFs channels, expose more surface active sites, and then improve their catalytic and adsorption properties. . Contents of the invention [0004] The purpose of the present invention is to solve the above problems, to ...
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