A kind of preparation method of silver oxide supported porous membrane

A technology of silver oxide and porous membrane, which is applied in chemical instruments and methods, botanical equipment and methods, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of difficult separation and recovery of photocatalysts, small specific surface area, adsorption Poor performance and other problems, to achieve the effect of short reaction time, high activity, and efficient decomposition

Active Publication Date: 2021-07-20
HUNAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the photocatalysts prepared by the above two methods have the problems of difficult separation and recovery, small specific surface area, high cost and poor adsorption.

Method used

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  • A kind of preparation method of silver oxide supported porous membrane
  • A kind of preparation method of silver oxide supported porous membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] One of the embodiments of the preparation method of a silver oxide-supported porous membrane of the present invention comprises the following steps:

[0036] (1) Preparation of polyurethane solution: Weigh 15 g of polyester thermoplastic polyurethane particles with a Shore hardness of 55A and 80 g of N,N-dimethylformamide into the reactor, stir at a constant temperature of 25°C for 8 hours, and wait for The thermoplastic polyurethane particles are completely dissolved in the N,N-dimethylformamide solvent to obtain a polyester thermoplastic polyurethane solution;

[0037](2) Prepare the coating solution: add 13 g of 400-mesh activated carbon powder to the polyester thermoplastic polyurethane solution, use a high-speed stirrer to stir for 20 minutes to obtain a uniform coating solution, and then leave the coating for 3 hours. Keep it for later use after defoaming;

[0038] (3) Preparation of activated carbon-based porous film: Coat the coating liquid on the release paper...

Embodiment 2

[0043] One of the embodiments of the preparation method of a silver oxide-supported porous membrane of the present invention comprises the following steps:

[0044] (1) Preparation of polyurethane solution: Weigh 17 g of polyether-type thermoplastic polyurethane particles with a Shore hardness of 60 A and 90 g of N,N-dimethylacetamide into the reactor, stir at a constant temperature of 30°C for 7.5 hours, and wait for The thermoplastic polyurethane particles are completely dissolved to obtain a polyether thermoplastic polyurethane solution;

[0045] (2) Prepare the coating solution: add 15 g of 300-mesh activated carbon powder to the polyether thermoplastic polyurethane solution, stir with a high-speed stirrer for 30 minutes to obtain a uniform coating solution, and keep it for 3.5 hours after standing for defoaming;

[0046] (3) Preparation of activated carbon-based porous film: Coat the coating liquid on the release paper with a thickness of 0.03 mm, and quickly immerse the ...

Embodiment 3

[0051] One of the embodiments of the preparation method of a silver oxide-supported porous membrane of the present invention comprises the following steps:

[0052] (1) Preparation of polyurethane solution: Weigh 18 g of polyester thermoplastic polyurethane particles with a Shore hardness of 60 A and 100 g of N,N-dimethylformamide into the reactor, and stir at a constant temperature of 40°C for 7 hours , the polyurethane solution is obtained after the thermoplastic polyurethane particles are completely dissolved;

[0053] (2) Preparation of coating solution: Add 16 g of 400-mesh activated carbon powder to the polyurethane solution prepared in step (1), stir with a high-speed stirrer for 30 minutes to obtain a uniform coating solution, and let it stand for 4 hours to defoam keep for later use;

[0054] (3) Preparation of activated carbon-based porous film: Coat the coating solution prepared in step (2) on a release paper with a thickness of 0.02 mm, and quickly immerse the coa...

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Abstract

The invention relates to a preparation method of a silver oxide loaded porous membrane. The method comprises the following steps: step 1, preparing polyurethane solution: preparing polyurethane solution from 15 to 20 parts of polyurethane particles and 80 to 110 parts of solvent; step 2, preparing coating solution: adding 12 to 20 parts of active carbon powder to the polyurethane solution, Stir evenly and defoam to obtain the coating solution; step 3, prepare activated carbon-based porous film: apply the coating solution evenly on the release paper, immerse in the aqueous solution and solidify into a film, take it out, and peel off the release paper after drying; step 4 . Silver oxide loading: immerse the activated carbon-based porous film in a silver nitrate solution to avoid light and absorb it, then immerse it in a sodium hydroxide solution, take it out, wash, and dry to obtain a silver oxide-loaded porous film. The silver oxide-supported porous membrane of the invention has the characteristics of firm immobilization, easy recovery, multiple use and no secondary pollution. It can be used for water purification and disinfection.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial synthesis, and in particular relates to a preparation method of a silver oxide-loaded porous film. Background technique [0002] With the rapid development of industrialization, global environmental degradation has become increasingly prominent. In particular, the content of organic pollutants in the water environment has been increasing since the 1950s, and the composition of pollutants has become more and more complex. In recent years, the rapid development of solar photocatalytic degradation technology is considered as a water purification technology with potential application prospects due to its advantages of low cost, energy saving, environmental protection, and good biocompatibility. [0003] In the study of silver catalysts, silver oxide (Ag 2 O) is a silver-based photocatalyst that was studied earlier, and is a p-type semiconductor, in which Ag 2 The O valence band is hybridized b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/50B01J35/10A01N59/16A01P1/00C02F1/32C02F1/50C02F101/30
CPCA01N59/16B01J23/50B01J35/065B01J35/1004C02F1/32C02F1/50C02F2101/30
Inventor 周虎王晓虹许攀刘清泉杨慧芝汤龙王思甜
Owner HUNAN UNIV OF SCI & TECH
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