Membrane composite material loaded with indium-zinc sulfides and polyvinylidene fluoride and preparation method thereof

A technology of polyvinylidene fluoride and indium zinc sulfide, applied in chemical instruments and methods, membranes, membrane technology, etc., can solve the problems of PVDF membrane flux decrease, photocatalytic effect reduction, membrane structure damage, etc., and achieve good electrical conductivity , stable structure and good adsorption capacity

Active Publication Date: 2018-10-12
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The supported photocatalytic film is divided into film surface loading and bulk modification, but the PVDF film surface is very smooth, it is difficult to load the catalyst on its surface for a long time, and the photocatalytic doping into the PVDF film will significantly reduce the photocatalytic effect, and the organic The membrane structure of the PVDF membrane material may be destroyed in the long-term photocatalytic reaction
For suspended photocatalytic membrane reactors, PVDF membranes are mainly used to intercept and separate catalysts, but catalyst particles will block the membrane pores and further form a filter cake layer on the membrane surface, resulting in serious membrane fouling, resulting in a decrease in the flux of PVDF membranes

Method used

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  • Membrane composite material loaded with indium-zinc sulfides and polyvinylidene fluoride and preparation method thereof
  • Membrane composite material loaded with indium-zinc sulfides and polyvinylidene fluoride and preparation method thereof
  • Membrane composite material loaded with indium-zinc sulfides and polyvinylidene fluoride and preparation method thereof

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preparation example Construction

[0035] refer to Figure 1 to Figure 3 , a kind of preparation method of the membrane composite material of loading indium zinc sulfide and polyvinylidene fluoride (PVDF) of the present invention, comprises the following steps:

[0036] (1) Choose carbon felt as the support and conductive layer of the membrane composite material. The size of the carbon felt should be the same as the size of the water treatment membrane module, and the selected carbon felt should be pretreated. Just immerse the carbon felt, including:

[0037] The first step is to soak the carbon felt in acetone for 30-60 minutes, and rinse it several times with deionized water;

[0038] In the second step, soak the carbon felt in absolute ethanol for 30-60 minutes, and then rinse it several times with deionized water;

[0039] In the third step, the rinsed carbon felt is dried at 60° C. for 4 hours to obtain a ready-to-use carbon felt template after pretreatment.

[0040] (2) Preparation of casting solution:...

Embodiment 1

[0050] A preparation method for loading indium zinc sulfide and PVDF membrane composite material, comprising the following steps:

[0051] (1) Choose 17cm×19cm carbon felt as the composite template for pretreatment:

[0052] In the first step, soak the carbon felt in 200mL of acetone for 30 minutes, then rinse it with deionized water;

[0053] In the second step, soak the carbon felt in 200mL of absolute ethanol for 30 minutes, and rinse it with deionized water again;

[0054] The third step is to dry the rinsed carbon felt at 60° C. for 4 hours.

[0055] (2) Preparation of casting solution:

[0056] 3 g of polyvinylpyrrolidone (K.30) and 15 g of PVDF were dissolved in 100 mL of N,N-dimethylacetamide (DMAC) under constant stirring overnight to remove air bubbles at room temperature.

[0057] (3) Preparation of precursor solution:

[0058] Dissolve 0.1363g of zinc chloride, 0.5865g of indium chloride tetrahydrate and 0.4508g of thioacetamide in 10mL of deionized water to pr...

Embodiment 2

[0062] A preparation method for loading indium zinc sulfide and PVDF membrane composite material, comprising the following steps:

[0063] (1) Choose 17cm×19cm carbon felt as the composite template for pretreatment:

[0064] In the first step, soak the carbon felt in 200mL of acetone for 60 minutes, then rinse it with deionized water;

[0065] In the second step, soak the carbon felt in 200mL of absolute ethanol for 60 minutes, and rinse it with deionized water again;

[0066] The third step is to dry the rinsed carbon felt at 60° C. for 4 hours.

[0067] (2) Preparation of casting solution:

[0068] 3 g of polyvinylpyrrolidone (K.30) and 15 g of PVDF were dissolved in 100 mL of N,N-dimethylacetamide (DMAC) under constant stirring overnight to remove air bubbles at room temperature.

[0069] (3) Preparation of precursor solution:

[0070] Dissolve 0.1363g of zinc chloride, 0.5865g of indium chloride tetrahydrate and 0.4508g of thioacetamide in 20mL of deionized water to pr...

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Abstract

The invention discloses a membrane composite material loaded with indium-zinc sulfides and polyvinylidene fluoride and a preparation method thereof. The preparation method of the membrane composite material loaded with indium-zinc sulfides and polyvinylidene fluoride comprises the following steps: Step 1, blending an aqueous solution of zinc chloride, indium(III) chloride tetrahydrate and thioacetamide; Step 2, dissolving polyvinylpyrrolidone and polyvinylidene fluoride (PVDF) in N, N-dimethyl acetamide; and Step 3, respectively coating surfaces at two sides of a piece of carbon felt with theprecursor solution obtained in the Step 1 and the membrane-casting solution obtained in the Step 2, and carrying out complete reaction at 80-160 DEG C so as to obtain the membrane composite material loaded with indium-zinc sulfides and polyvinylidene fluoride. The membrane composite material disclosed by the invention is capable of realizing continuous catalytic degradation and filtration on sewage. Moreover, the indium-zinc sulfide catalyst is loaded on one side of the carbon felt while the PVDF membrane is loaded on the other side of the carbon felt, so that separation of photo-catalysis process from membrane separation process is realized in space; and thus, the photo-catalysis process and the membrane separation process do not affect each other.

Description

technical field [0001] The invention belongs to the technical field of photocatalytic or photoelectric catalytic membrane composite materials, and in particular relates to a membrane composite material loaded with indium zinc sulfide and polyvinylidene fluoride and a preparation method thereof. Background technique [0002] Indium zinc sulfide has great potential value in the fields of photocatalysis, charge storage, electrochemical recording, and thermoelectric applications, and has become a hot research material in recent years. Indium zinc sulfide has a suitable semiconductor band gap structure, has high photocatalytic activity under visible light, and has a variety of synthesis methods, and is easy to prepare. It has been widely used in photolysis of water to produce hydrogen, photocatalytic degradation of refractory organic pollutants, photo Catalytic reduction of carbon dioxide and selective catalytic oxidation reactions. However, nano- or micron-scale powdered indium...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/34B01D69/12B01D67/00C02F1/30C02F1/46
CPCB01D67/0079B01D69/12B01D71/34B01D2311/2611B01D2311/2649B01D2311/2696C02F1/30C02F1/46
Inventor 高波安家君刘嘉栋陈伟萍
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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