Preparation method, product and application of gradient-adjustable high-strength anti-deposition long-acting catalytic membrane

A catalytic membrane and anti-deposition technology, which can be used in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc. Reusable rate, reduced preparation cost, reduced leaching effect

Active Publication Date: 2022-05-13
北京师范大学珠海校区
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In order to solve the problems in the above-mentioned prior art, the present invention provides a preparation method, product and application of a gradient-adjustable high-strength anti-deposition long-acting catalytic membrane, and adopts a low-temperature one-step synthesis method to obtain a catalytic membrane precursor membrane with a porous structure. Afterwards, the catalytic membrane was obtained by freeze-drying, which solved the problems of cumbersome steps in the preparation of nanofiber membrane catalysts (catalytic membranes), difficult structure control, and low mechanical strength in the prior art, and improved the low reaction efficiency of the catalytic membrane during the degradation of organic pollutants. , unstable structure, short service life, difficult to recycle and other disadvantages

Method used

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  • Preparation method, product and application of gradient-adjustable high-strength anti-deposition long-acting catalytic membrane
  • Preparation method, product and application of gradient-adjustable high-strength anti-deposition long-acting catalytic membrane
  • Preparation method, product and application of gradient-adjustable high-strength anti-deposition long-acting catalytic membrane

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Experimental program
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Effect test

Embodiment 1

[0040] Step 1, preparation of nano-metal oxide catalyst: copper acetylacetonate is placed in a crucible, nitrogen gas is introduced, the deposition temperature is 200°C, the heating rate is 5°C / min, and the deposition time is 60min to obtain a nano-metal catalyst precursor . The obtained nano-metal catalyst precursor was calcined in air at a calcining temperature of 450°C, an initial temperature of 25°C, a heating rate of 1°C / min, and a calcining time of 4 hours to obtain a nano-metal oxide catalyst.

[0041] Step 2, preparation of 100g / L polyacrylonitrile solution: Weigh 5g of polyacrylonitrile solid, dissolve in 50mL N,N-dimethylformamide, put in a magnet, and stir on a magnetic stirrer for 15min.

[0042] Step 3, the preparation of gradient adjustable high-strength anti-deposition long-term catalytic membrane (referred to as catalytic membrane):

[0043] 1) Weigh 2g of the nanometer metal oxide catalyst and dissolve it in 50mL of the 100g / L polyacrylonitrile solution prepa...

Embodiment 2

[0049] Step 1, preparation of nano-metal oxide catalyst: place iron acetylacetonate in a crucible, pass nitrogen gas, deposition temperature is 250°C, heating rate is 6°C / min, deposition time is 80min, and nano-metal catalyst precursor is obtained . The obtained nano-metal catalyst precursor was calcined in air at a calcining temperature of 500°C, an initial temperature of 25°C, a heating rate of 2°C / min, and a calcining time of 6 hours to obtain a nano-metal oxide catalyst.

[0050] Step 2, preparation of 150g / L polyacrylonitrile solution: Weigh 7.5g polyacrylonitrile solid, dissolve in 50mL N,N-dimethylformamide, put in a magnet, and stir on a magnetic stirrer for 15min.

[0051] Step 3, the preparation of gradient adjustable high-strength anti-deposition long-term catalytic membrane (referred to as catalytic membrane):

[0052]1) Weigh 4g of the nanometer metal oxide catalyst and dissolve it in 50mL of the 150g / L polyacrylonitrile solution prepared in step 2, and stir in a...

Embodiment 3

[0058] Step 1, preparation of nano-metal oxide catalyst: place chromium acetylacetonate in a crucible, pass through argon gas, the deposition temperature is 300°C, the heating rate is 8°C / min, and the deposition time is 90min, before preparing the nano-metal catalyst body. The obtained nano-metal catalyst precursor was calcined in air at a calcining temperature of 600° C., an initial temperature of 25° C., a heating rate of 3° C. / min, and a calcining time of 8 hours to obtain a nano-metal oxide catalyst.

[0059] Step 2, preparation of 200g / L polyacrylonitrile solution: Weigh 10g of polyacrylonitrile solid, dissolve in 50mL of N,N-dimethylformamide, put in a magnet, and stir on a magnetic stirrer for 15min.

[0060] Step 3, the preparation of gradient adjustable high-strength anti-deposition long-term catalytic membrane (referred to as catalytic membrane):

[0061] 1) Weigh 6g of nanometer metal oxide catalyst and dissolve it in 50mL of step 2 to prepare 200g / L polyacrylonitr...

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Abstract

The invention discloses a preparation method, a product and application of a gradient-adjustable high-strength anti-deposition long-acting catalytic membrane, and relates to the technical field of composite materials. The method comprises the following steps: adding a nano metal oxide catalyst into an N, N-dimethylformamide solution of polyacrylonitrile or polystyrene, uniformly mixing, carrying out electrostatic spinning, keeping a receiver at-190 to-200 DEG C in the electrostatic spinning process, and carrying out freeze drying treatment on a catalytic membrane precursor membrane obtained after the electrostatic spinning is finished, so as to obtain the catalytic membrane. The gradient-adjustable high-strength anti-deposition long-acting catalytic membrane is obtained. According to the method, the gradient-adjustable high-strength anti-deposition long-acting catalytic membrane is obtained through a one-step method by adopting an ultralow-temperature-electrostatic spinning technology and combining with nano-metal, the contradictory relation between the catalytic efficiency and the membrane stability in a traditional catalytic membrane is solved, the catalytic performance of the membrane is fully played, organic polluted wastewater can be efficiently catalytically degraded, and the application prospect is wide. The service life is prolonged.

Description

technical field [0001] The invention relates to the technical field of composite materials, in particular to a preparation method, product and application of a gradient-adjustable high-strength anti-deposition long-acting catalytic membrane. Background technique [0002] A good ecological environment is the fundamental basis for the sustainable development of people and society. With the vigorous development of modern industry and the continuous improvement of people's awareness of environmental protection, environmental pollution has received more and more attention, and organic wastewater is one of the environmental pollution. An important source, its effective treatment and environmental remediation after pollution have become the research topic of many scholars. Based on the above background, how to achieve efficient green purification of organic wastewater and improve the economic benefits of polluted water restoration has very important practical significance for susta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/06B01J37/03B01J23/745B01J23/72B01J23/26B01J37/08B01J35/06B01J35/10D04H1/728D01D5/00C02F1/72C02F101/38
CPCB01J31/06B01J37/031B01J23/745B01J23/72B01J23/26B01J37/08B01J35/065B01J35/1004B01J35/1052C02F1/725D04H1/728D01D5/003C02F2101/40C02F2101/38C02F2101/308B01D2325/10B01D69/145B01D69/02B01D2323/39B01D69/148B01J35/0013B01D67/00793B01D67/00042B01D61/00B01D2325/28B01D65/08C02F1/44B01D71/281B01D69/1213B01D71/421B01J37/32C02F2101/30
Inventor 杨逸鲍露露朱慧祺许旭辉王一诺龙雨茜徐瑞坤林浩汶郑辰洋
Owner 北京师范大学珠海校区
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