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Imprinting-like MOF adsorbent as well as preparation method and application thereof

An adsorbent and imprinting technology, which is applied in the field of imprinted MOF adsorbent and its preparation, to achieve the effects of favorable adsorption, uniform material particle size, and mild conditions

Active Publication Date: 2021-02-23
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims at the problem of absorbing and storing fragrances in the current flavor and fragrance industry, and provides a novel MOF (Fe)-like adsorbent capable of strongly adsorbing various kinds of fragrances and its preparation method and application

Method used

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  • Imprinting-like MOF adsorbent as well as preparation method and application thereof
  • Imprinting-like MOF adsorbent as well as preparation method and application thereof
  • Imprinting-like MOF adsorbent as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0033] Preparation of MOF(Fe) material: take 1.0mmol of Fe(NO 3 ) 3 9H 2 O in a container, add 15mL ultrapure water to dissolve, add 0.6mmol trimesic acid under stirring condition and stir for 1h, after mixing thoroughly, add 75μL of HF and HNO in turn 3 The suspension is obtained; the suspension is then transferred to a high-pressure reactor for high-temperature reaction, and after the reaction is completed, the MOF (Fe) is obtained by washing, centrifuging, and drying.

[0034] MOF(Fe) materials are all subjected to high-temperature reaction in a programmed temperature-controlled oven:

[0035] (a) Heating process: from room temperature to 150°C at a heating rate of 1-10°C / min;

[0036] (b) Constant temperature process: keep at 150°C for 24 hours;

[0037] (c) Cooling process: Immediately after the constant temperature process, take it out of the drying box and let it cool down to room temperature naturally.

[0038] This is true for the following examples.

Embodiment 2

[0040] A preparation method of a novel imprinted MOF (Fe) adsorbent, comprising the steps of:

[0041] (1) Take 1.0mmol of Fe(NO 3 ) 3 9H 2O in a container, add 15mL ultrapure water to dissolve, add 0.6mmol trimesic acid under stirring condition and stir for 1h, after fully mixing, add 75μL of HF and HNO in turn 3 Obtain the suspension; then transfer the suspension to a high-pressure reactor for high-temperature reaction, after the reaction is completed, wash and centrifuge and then dry to obtain MOF(Fe);

[0042] (2) Put 1.0mmol MOF(Fe) and anisaldehyde in the step (1) in a molar ratio of 1:0.2 in a stainless steel ball mill tank, and place 6 stainless steel ball mill balls with different diameters (one with a diameter of 10.3mm , and the other 5 pieces with a diameter of 5.1 mm) were ball-milled, and the ball-milling time was set to 30 minutes, and the ball-milling frequency was 50 Hz. After ball milling, place in a 1:1 ethanol water bath at 90°C for 12 hours. Finally, ...

Embodiment 3

[0044] A preparation method of a novel imprinted MOF (Fe) adsorbent, comprising the steps of:

[0045] (1) Take 1.0mmol of Fe(NO 3 ) 3 9H 2 O in a container, add 15mL ultrapure water to dissolve, add 0.7mmol trimesic acid under stirring condition and stir for 1h, after mixing thoroughly, add 75μL of HF and HNO in sequence 3 Obtain the suspension; then transfer the suspension to a high-pressure reactor for high-temperature reaction, after the reaction is completed, wash and centrifuge and then dry to obtain MOF(Fe);

[0046] (2) Place 1.0mmol MOF(Fe) and 2,6-lutidine in the step (1) in a stainless steel ball milling jar at a molar ratio of 1:0.5, and place 6 stainless steel balls with different diameters in it ( One diameter is 10.3mm, and the other 5 diameters are 5.1mm), conduct ball milling, set the ball milling time to 50min, and ball milling frequency to 20Hz. After ball milling, place in a 1:1 ethanol aqueous solution in a water bath at 90°C for 3 hours. Finally, it ...

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Abstract

The invention discloses an imprinting-like MOF adsorbent as well as a preparation method and application thereof. The preparation method comprises the following steps: carrying out hydrothermal synthesis on MOF(Fe) according to an existing method; putting MOF(Fe) and imprinted molecules into a stainless steel ball milling tank for ball milling, conducting water bath activation in an ethanol aqueous solution after ball milling is finished, conducting centrifugal drying after activation is finished, and finally conducting cleaning, centrifuging and drying to obtain the imprinted MOF adsorbent. Post-ligand replacement is achieved through high energy generated by ball-milling friction, part of organic ligands are replaced by imprinted molecules in the ball-milling process, and the imprinting purpose is achieved. The imprinting-like MOF adsorbent is effectively prepared by controlling the addition amount of imprinting molecules and the ball milling time and frequency, and strong adsorptionof perfume with an imprinting molecule similar structure is realized.

Description

technical field [0001] The invention belongs to the field of porous crystal materials, in particular to a kind of imprinted MOF adsorbent and its preparation method and application. Background technique [0002] At present, in my country's food flavoring and cigarette flavoring industries, consumers have gradually put forward higher requirements for various products, such as foods and cigarettes with special or rich flavors. This has also brought challenges and development to the flavor and fragrance industry. How to realize the efficient storage of fragrance molecules is a problem that the flavor and fragrance industry needs to constantly explore and improve. Among the many fragrance storage methods, the adsorption method is currently the most industrially promising method. It uses porous materials as fragrance storage materials, and uses the pore structure and surface properties of the materials to achieve the adsorption and fragrance storage effect with fragrance molecul...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/28B01J20/30
CPCB01J20/226B01J20/22B01J20/3021B01J20/28066Y02C20/40
Inventor 赵钟兴陈功李思涵何辉赵祯霞
Owner GUANGXI UNIV
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