Aluminum foil-based aluminum-fumaric acid MOF adsorbent coating and mixed solvent in-situ synthesis method and application thereof

A mixed solvent, in-situ synthesis technology, applied in chemical instruments and methods, other chemical processes, alkali metal compounds, etc., can solve the problem of low water adsorption capacity, and achieve high equilibrium adsorption capacity, simple synthesis process, and strong bonding. Effect

Active Publication Date: 2020-04-10
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, de Lange et al. deposited CAU-10 on the surface of aluminum foil by in-situ reaction, but the overall water adsorption capacity (0.0099g / g) was relatively low, indicating that the synthesized coating was relatively thin (M.F.de Lange, T.Zeng, T.J.H.Vlugt , J.Gascon, and F.Kapteijn,Manufacture of dense CAU-10-H coatings for application in adsorption driven heat pumps: optimization and characterization.Crystengcomm 17(2015)5911-5920.)
Therefore, MOF adsorbents have rarely been reported to form thick coatings (>100 μm) on substrates by in situ synthesis.

Method used

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  • Aluminum foil-based aluminum-fumaric acid MOF adsorbent coating and mixed solvent in-situ synthesis method and application thereof
  • Aluminum foil-based aluminum-fumaric acid MOF adsorbent coating and mixed solvent in-situ synthesis method and application thereof
  • Aluminum foil-based aluminum-fumaric acid MOF adsorbent coating and mixed solvent in-situ synthesis method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] A kind of mixed solvent in-situ synthesis method of aluminum foil base aluminum-fumaric acid MOF adsorbent coating, comprises the steps:

[0047] (1) Add 0.4872g (4.2mmol) fumaric acid to 10ml nitrogen, nitrogen-dimethylformamide (DMF) in a 100mL beaker, and mix well under magnetic stirring to obtain a fumaric acid solution; in another 100mL beaker 1.33g (2mmol) aluminum salt (select Al 2 (SO 4 ) 3 18H 2 O) add 20ml deionized water, mix uniformly, obtain aluminum salt solution; then described fumaric acid solution and aluminum salt solution mix homogeneously, obtain mixed solution, described nitrogen, the volume of nitrogen-dimethylformamide and water The ratio is 1:2; in the mixed solution, the fumaric acid and Al 3+ The molar ratio of the mixture is 1.05:1, and the pH of the mixed solution is adjusted to be 1.0 by adding dropwise glacial acetic acid to obtain a uniform acidic reaction solution;

[0048] (2) Use fine sandpaper to scrape off the oxide film on the s...

Embodiment 2

[0051] A kind of mixed solvent in-situ synthesis method of aluminum foil base aluminum-fumaric acid MOF adsorbent coating, comprises the steps:

[0052] (1) Add 0.2552g (2.2mmol) fumaric acid to 15ml nitrogen, nitrogen-dimethylformamide (DMF) in a 100mL beaker, and mix well under magnetic stirring to obtain a fumaric acid solution; in another 100mL beaker 0.666g (1mmol) aluminum salt (select Al 2 (SO 4 ) 3 18H 2 O) add 15ml deionized water, mix uniformly, obtain aluminum salt solution; then described fumaric acid solution and aluminum salt solution mix homogeneously, obtain mixed solution, described nitrogen, the volume of nitrogen-dimethylformamide and water The ratio is 1:1; in the mixed solution, the fumaric acid and Al 3+ The molar ratio of the mixture is 1.1:1, and the pH of the mixed solution is adjusted to be 1.5 by adding dropwise glacial acetic acid to obtain a uniform acidic reaction solution;

[0053] (2) Use fine sandpaper to scrape off the oxide film on the s...

Embodiment 3

[0056] A kind of mixed solvent in-situ synthesis method of aluminum foil base aluminum-fumaric acid MOF adsorbent coating, comprises the steps:

[0057] (1) In a 100mL beaker, add 0.1392g (1.2mmol) fumaric acid into 12.5ml nitrogen, nitrogen-dimethylformamide (DMF), and mix well under magnetic stirring to obtain a fumaric acid solution; in another 100mL Put 0.333g (0.5mmol) aluminum salt (select Al 2 (SO 4 ) 3 18H 2 O) add 17.5ml deionized water, mix homogeneously, obtain aluminum salt solution; Then described fumaric acid solution and aluminum salt solution are mixed homogeneously, obtain mixed solution, described nitrogen, nitrogen-dimethylformamide and water The volume ratio is 0.714:1; in the mixed solution, the fumaric acid and Al3+ The molar ratio of the mixture is 1.2:1, and the pH of the mixed solution is adjusted to be 2.0 by adding dropwise glacial acetic acid to obtain a uniform acidic reaction solution;

[0058] (2) Use fine sandpaper to scrape off the oxide fi...

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Abstract

The invention discloses an aluminum foil-based aluminum-fumaric acid MOF adsorbent coating and a mixed solvent in-situ synthesis method and application thereof. The method comprises the following steps of: adding fumaric acid into nitrogen, nitrogen-dimethylformamide, adding aluminum salt into water, uniformly mixing the fumaric acid and the aluminum salt to obtain a mixed solution, and adjustingthe pH value to be acidic to obtain a uniform acidic reaction solution; and immersing an aluminum foil in the uniform acidic reaction solution, heating, taking out, washing, drying and activating to obtain the aluminum foil-based aluminum-fumaric acid MOF adsorbent coating. The aluminum foil-based aluminum-fumaric acid MOF adsorbent coating prepared by the invention is adjustable in thickness, isuniformly and densely distributed on the aluminum foil, and is high in bonding strength with a base material; the adsorbent coating has the characteristics of strong adsorption capacity, high adsorption speed, low desorption temperature, good cycling stability and the like. The aluminum foil-based aluminum-fumaric acid MOF adsorbent coating can be used for adsorbent coated substrates useful in airhandling systems such as heating, ventilation, and air conditioning (HVAC), as well as adsorbent coated aluminum foil finned heat exchangers for adsorptive heat pump systems.

Description

technical field [0001] The invention belongs to the field of porous adsorbent composite materials, and in particular relates to an aluminum foil-based aluminum-fumaric acid MOF adsorbent coating and a mixed solvent in-situ synthesis method and application thereof. Background technique [0002] Solid porous adsorbents, including traditional activated carbon, activated clay, silica gel, activated alumina, and aluminum silicate molecular sieves, are widely used in the fields of adsorption and catalysis. In particular, a new class of adsorbents developed in recent years—metal-organic frameworks (MOFs) have been used in gas separation and storage, heat transfer, and dehumidification due to their large surface area, adjustable pore size, and various topological structures. increasingly attracting the attention of researchers. MOFs are a class of crystalline materials composed of metal ions and organic linkers. Due to their excellent adsorption capacity, low regeneration temperat...

Claims

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Application Information

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IPC IPC(8): B01J20/22B01J20/28B01J20/32
CPCB01J20/226B01J20/28033B01J20/3297
Inventor 梁向晖谭冰琼方玉堂汪双凤高学农张正国
Owner SOUTH CHINA UNIV OF TECH
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