Preparation method of silver oxide loaded porous membrane

A silver oxide, porous membrane technology, 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 problems such as poor performance, to achieve the effect of short reaction time, high activity and convenient operation

Active Publication Date: 2019-01-18
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 diffi

Method used

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  • Preparation method of silver oxide loaded porous membrane
  • Preparation method of silver oxide loaded porous membrane

Examples

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Example Embodiment

[0034] Example 1

[0035] One of the embodiments of the method for preparing a silver oxide-supported porous film of the present invention includes the following steps:

[0036] (1) Prepare 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 for 8 hours at a constant temperature of 25°C, and wait. The thermoplastic polyurethane particles are completely dissolved in the N,N-dimethylformamide solvent to obtain a polyester thermoplastic polyurethane solution;

[0037] (2) Preparation of the coating liquid: Add 13 g of 400 mesh activated carbon powder to the polyester thermoplastic polyurethane solution, stir with a high-speed mixer for 20 minutes to obtain a uniform coating liquid, and then let the coating film stand for 3 hours. Keep it for later use after defoaming;

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

Example Embodiment

[0042] Example 2

[0043] One of the embodiments of the method for preparing a silver oxide-supported porous film of the present invention includes the following steps:

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

[0045] (2) Preparation of coating liquid: 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 liquid, and keep it for 3.5 hours after defoaming.

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

Example Embodiment

[0050] Example 3

[0051] One of the embodiments of the method for preparing a silver oxide-supported porous film of the present invention includes the following steps:

[0052] (1) Prepare 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 After hours, the polyurethane solution will be obtained after the thermoplastic polyurethane particles are completely dissolved;

[0053] (2) Preparation of coating liquid: 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 liquid, and let it stand for 4 hours to defoam Keep for future use

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

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Abstract

The invention discloses a preparation method of a silver oxide loaded porous membrane. The preparation method comprises the following steps: 1, polyurethane solution preparation: preparing a polyurethane solution from 15-20 parts of polyurethane particles and 80-110 parts of solvent; 2, locating solution preparation: adding 12-20 parts of activated carbon powder into the polyurethane solution, andcarrying out uniform stirring and defoaming to obtain a coating solution; 3 activated carbon based porous film preparation: uniformly coating release paper with the coating solution, then, immersingthe release paper into an aqueous solution, carrying out curing to form a film, then, taking out the film, carrying out drying, and then, stripping off the release paper; and 4, silver oxide loading:immersing an activated carbon based porous film into a silver nitrate solution, carrying out adsorption in a dark place, then, immersing the activated carbon based porous film into a sodium hydroxidesolution, taking out the activated carbon based porous film, washing the activated carbon based porous film, and drying the activated carbon based porous film to obtain the silver oxide loaded porousmembrane. The silver oxide loaded porous membrane prepared by using the preparation method has the characteristics of immobilization firmness, simplicity in recovery, repeated use and no secondary pollution and can be used for water resource 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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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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