A kind of mofs/mips catalyst and its in-situ growth preparation method and application

An in-situ growth and catalyst technology, applied in catalyst activation/preparation, physical/chemical process catalyst, organic compound/hydride/coordination complex catalyst, etc., can solve the problem of high cost, low efficiency of chemical treatment, and difficult degradation Pollutants and other problems, to achieve the effect of enhanced stability, easy control of reaction conditions, and simple and easy reaction process

Active Publication Date: 2021-07-20
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of low efficiency and high cost of the refractory pollutant DMP in the treatment of wastewater, and provides a method for preparing MOFs / MIPs by using the in-situ growth method and its targeted oxidation degradation of DMP in water, which can efficiently Remove target environmental pollutants in wastewater to ensure water environment safety

Method used

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  • A kind of mofs/mips catalyst and its in-situ growth preparation method and application
  • A kind of mofs/mips catalyst and its in-situ growth preparation method and application
  • A kind of mofs/mips catalyst and its in-situ growth preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] In this example, the effects of different reaction conditions on the adsorption of DMP by MIPs were compared.

[0048] A preparation method of MIPs, comprising the steps of:

[0049] (1) Add the template molecule (DMP), functional monomer (MAA) and porogen (acetonitrile) into a 50mL centrifuge tube for ultrasonic dispersion, and then carry out pre-polymerization reaction,

[0050] The reaction conditions were controlled to the following 6 types (as shown in Table 1 below).

[0051] Table 1

[0052]

[0053] Six kinds of pre-polymerized reactants were obtained, named as Pre-MIPs-1, Pre-MIPs-2, Pre-MIPs-3, Pre-MIPs-4, Pre-MIPs-5 and Pre-MIPs-6;

[0054] (2) Preparation of hemispherical MIPs by bulk polymerization: the reaction of the crosslinking agent ethylene glycol dimethacrylate (EGDMA), the initiator azobisisobutyronitrile (AIBN) and the prepolymerization described in step (1) The product (Pre-MIPs-3 is selected here) is mixed evenly, and then heated in a water...

Embodiment 2

[0068] This example compares the effects of different reaction conditions on the targeted degradation of DMP by MOFs / MIPs.

[0069] A kind of in-situ growth preparation method of MOFs / MIPs catalyst, comprises the following steps:

[0070] (1) Preparation of MOFs / MIPs and MOFs / NIPs by in situ growth method: DMF (dimethylformamide), 2,5-dihydroxyterephthalic acid, ferrous chloride, water, methanol (analytically pure, 99.5 %) and the imprinted polymer (here MIPs-3) prepared in step (4) of Example 1 were uniformly mixed in a reaction kettle to obtain a mixed solution, which was uniformly dispersed by ultrasonic and heated in an oven.

[0071] Reaction condition is controlled as following 6 kinds (as shown in table 4 below);

[0072] Table 4

[0073]

[0074]

[0075] The products obtained above (heating product-1, heating product-2, heating product-3, heating product-4, heating product-5 and heating product-6) were washed with DMF respectively, and then soaked in methanol ...

Embodiment 3

[0085] This example compares the targeting selectivity of MOFs / MIPs catalysts to DMP.

[0086] Three structural analogues of DMP were selected, namely diethyl phthalate (DEP) solution, dibutyl phthalate (DBP) solution and bis(2-ethyl phthalate) Di-2-ethylhexyl phthalate (DEHP)) was used to study the target selectivity of MOFs / MIPs catalysts for DMP. Prepare DMP solution, DEP solution, DBP solution and DEHP solution that initial concentration is 30mg / L respectively, add the MOFs / MIPs catalyst (MOFs / MIPs-2) that embodiment 2 makes respectively to above-mentioned four kinds of solutions, embodiment 2 The prepared MOFs / MIPs catalyst was added in an amount of 2.4g / L (that is, 2.4g of catalyst was added per liter of solution), and the adsorption reaction was carried out in a shaker at 180rpm at room temperature (25°C) for 24h (to ensure that the adsorption Equilibrium), add oxidant PS (persulfate (Persulfate, PS)) to 4 kinds of solutions respectively, the molar ratio of the additio...

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Abstract

The invention discloses a MOFs / MIPs catalyst and its in-situ growth preparation method and application. The method comprises: uniformly mixing template molecules, functional monomers and porogens, performing a prepolymerization reaction to obtain a prepolymerized reactant; uniformly mixing a crosslinking agent, an initiator and the prepolymerized reactant, heating, The template molecule is eluted by Soxhlet extraction, dried to obtain the imprinted polymer; dimethylformamide, 2,5-dihydroxyterephthalic acid, ferrous chloride, water, methanol are mixed with the imprinted polymer uniform, heated, washed, soaked with methanol, washed, and dried to obtain the MOFs / MIPs catalyst. The catalyst provided by the invention has high degradation efficiency, can realize highly selective adsorption and catalytic degradation of organic pollutants, and has good stability. The catalyst provided by the invention is a block catalyst, which can avoid problems such as difficult recovery of traditional water treatment catalysts , which is easy for practical application.

Description

technical field [0001] The invention belongs to the technical field of water pollution control, and in particular relates to a MOFs / MIPs catalyst and its in-situ growth preparation method and application. Background technique [0002] Dimethyl phthalate (DMP) is a typical refractory organic pollutant commonly found in water bodies, mostly from dyes, pesticides, coking, pulp and paper, pharmaceuticals, plastics, food processing, cosmetics production and other industries. The process mainly enters surface water and groundwater through direct discharge of domestic sewage, output of sewage treatment plants, sludge reuse landfill, landfill, agricultural animal husbandry and aquaculture, etc., with low content, stable structure and heterogeneous DMP has a large body, long half-life, high toxicity, and usually has strong lipophilicity and hydrophobicity. It can bioaccumulate in the adipose tissue of biological organs, amplify step by step along the food chain, and destroy the stabi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G83/00B01J31/22B01J35/02C08F220/06C08F222/14C08J9/26C02F1/72
CPCB01J31/1691B01J31/2208B01J35/02C08F220/06C08G83/008C08J9/26C02F1/725B01J2531/0213B01J2531/842C02F2101/34C02F2103/28C02F2103/20C02F1/288B01J31/067B01J31/2239B01J2231/70B01J2531/0216B01J37/035B01J37/08B01J37/343B01J37/031B01J37/06C02F2101/30
Inventor 万金泉丁苏马邕文王艳闫志成
Owner SOUTH CHINA UNIV OF TECH
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