Preparation method and application of fiber composite membrane catalyst

A fiber composite and catalyst technology, which is applied in chemical instruments and methods, organic compound/hydride/coordination complex catalysts, physical/chemical process catalysts, etc., can solve the problems of reduced catalytic performance, easy agglomeration, etc. , to avoid agglomeration, the effect of high catalytic efficiency

Inactive Publication Date: 2018-12-07
SHAANXI UNIV OF SCI & TECH
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  • Abstract
  • Description
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Problems solved by technology

[0006] In order to overcome the shortcomings of the above-mentioned prior art, the purpose of the present invention is to provide a preparation method and application of a fiber composite membrane catalyst, 1) carboxymethylation treatment of cellulose fibers; 2) in-situ synthesis of metal organic frameworks by impregnation method (Cu-MOFs) on the modified fiber; 3) Microwave reduction disperses the nano-Ag load on the MOFs, which solves the problem that the metal nanoparticle catalyst is easy to agglomerate and leads to the reduction of catalytic performance, and the recovery is simple and the catalytic efficiency is high.

Method used

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  • Preparation method and application of fiber composite membrane catalyst
  • Preparation method and application of fiber composite membrane catalyst
  • Preparation method and application of fiber composite membrane catalyst

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Effect test

Embodiment 1

[0028] The preparation method of fiber composite membrane catalyst comprises the following steps:

[0029] 1) Select cotton dissolving pulp, beat and disperse to obtain cellulose pulp with a mass fraction of 4%; add 5ml of 15% sodium hydroxide solution to 1g of cellulose pulp, and carry out alkalization reaction at room temperature, After reacting for 3 hours, add 5ml of 20% sodium chloroacetate solution to carry out etherification reaction at 60°C, react for 4 hours, and finally wash the fiber with absolute ethanol at room temperature until neutral to obtain carboxymethyl fiber;

[0030] 2) Prepare two 100ml mixed solutions of N,N-dimethylformamide (DMF), ethanol and water as solution A and solution B, N,N-dimethylformamide (DMF), ethanol and water The volume ratio is 1:1:1; add 2g of copper acetate to solution A, add 1g of trimesic acid to solution B, and stir thoroughly; weigh 2g of carboxymethyl fiber and soak it in solution A for 30min, then Transfer to B solution for 30...

Embodiment 2

[0034] The preparation method of fiber composite membrane catalyst comprises the following steps:

[0035] 1) Select DQP bleached bamboo pulp, and after beating and dispersing, a cellulose pulp with a mass fraction of 6% is obtained; 8ml of a 20% sodium hydroxide solution is added to 0.5g of the pulp, and alkalization is carried out at room temperature. After reacting for 2 hours, add 8ml of sodium chloroacetate solution with a concentration of 25% to carry out etherification reaction at 50°C, react for 3 hours, and finally wash the fibers with absolute ethanol at room temperature until neutral to obtain carboxymethyl fibers;

[0036] 2) Prepare two 100ml DMF, the mixed solutions of ethanol and water are recorded as solution A and solution B, the volume ratio of N,N-dimethylformamide (DMF), ethanol and water is 1:1:1; Add 2g of copper nitrate to solution A, add 1g of terephthalic acid to solution B, and stir thoroughly; weigh 1g of carboxymethyl fiber and soak it in solution A...

Embodiment 3

[0039] The preparation method of fiber composite membrane catalyst comprises the following steps:

[0040] 1) Select hardwood pulp, beat and disperse to obtain cellulose pulp with a mass fraction of 10%; add 10ml of 25% sodium hydroxide solution to 2g of cellulose pulp, and carry out alkalization reaction at room temperature , after reacting for 4 hours, add 10ml of sodium chloroacetate solution with a concentration of 25% to carry out etherification reaction at 40°C, react for 5 hours, and finally wash the fiber with absolute ethanol at room temperature until neutral to obtain carboxymethyl fiber;

[0041] 2) Prepare two 100ml mixtures of N,N-dimethylformamide (DMF), ethanol and water as solution A and solution B, N,N-dimethylformamide (DMF), ethanol and water The volume ratio is 1:1:1; add 2g of copper sulfate to solution A, add 1g of terephthalic acid to solution B, and stir thoroughly; weigh 3g of carboxymethyl fiber and soak it in solution A for 120min, then After transf...

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Abstract

A preparation method of a fiber composite membrane catalyst is as follows: firstly, cellulose fiber is subjected to carboxymethylation treatment, a large amount of carboxyl groups are introduced, metal organic framework MOFs are synthesized in situ on the fiber by immersion stirring, nano-Ag (Ag NPs) is loaded and dispersed on the MOFs by microwave reduction, and a nano-paper-based composite filmcatalytic material is finally obtained by washing, suction filtration, and paper making and forming; the practical size of the Ag nano-particles is between 6 and 20 nm, and rapid catalytic degradationand conversion of p-nitrophenol in wastewater to p-aminophenol can be realized by synergistic effects of the MOFs and the Ag nano-particles. The primary conversion rate is over 99%. Compared with a traditional granular catalyst, and the problems of difficult recovery, short catalytic time and high efficiency can be solved. The fiber composite membrane catalyst can be used as a filler to prepare acatalytic membrane material by mixing for paper making with other plant fibers. The catalytic membrane material has broad application prospects in the field of treating industrial wastewater.

Description

technical field [0001] The invention belongs to the technical field of nanocomposite material preparation and catalytic degradation, and in particular relates to a preparation method and application of a fiber composite membrane catalyst. Background technique [0002] With the continuous development of industry, serious water pollution problems continue to appear around the world, especially in developing countries. The problem of water pollution has become the first problem to be solved in the work of environmental governance. Phenol-containing wastewater is the main source of water pollution because of its high toxicity, difficult to degrade, complex components, and long residence time in the environment. Taking p-nitrophenol as an example, it is used as the main pharmaceutical raw material for the production of pharmaceutical intermediate p-nitrophenol ether and the one-step synthesis of anti-inflammatory and analgesic paracetamol, and it is also a raw material for the p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/28B01J35/06C02F1/70C02F101/38
CPCB01J31/28B01J35/065C02F1/70C02F2101/38
Inventor 段超刘超然孟欣蒙景茹王欣奇戴磊赵伟
Owner SHAANXI UNIV OF SCI & TECH
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