Cellulose/nano zinc oxide composite material and preparation method and application thereof

A technology of nano-zinc oxide and composite materials, applied in the photocatalytic degradation of organic pollutants, in the field of cellulose/nano-zinc oxide composite materials and its preparation, can solve surface enrichment, nano-zinc oxide irregular morphology, Problems such as large amount of zinc oxide composite material added

Active Publication Date: 2016-08-17
宁波海强装备科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the ZnO composites prepared by these methods have a large amount of addition and cannot be enriched on the surface, and the supported nano-ZnO has irregular morphology and is easy to agglomerate, so that the catalyst cannot participate in the catalytic reaction to the maximum extent.

Method used

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  • Cellulose/nano zinc oxide composite material and preparation method and application thereof
  • Cellulose/nano zinc oxide composite material and preparation method and application thereof
  • Cellulose/nano zinc oxide composite material and preparation method and application thereof

Examples

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preparation example Construction

[0099] The preparation method of composite material of the present invention comprises the steps:

[0100] 1) providing a cellulose sol film;

[0101] 2) The cellulose sol film is placed in a zinc salt solution, and the zinc salt solution soaked in the cellulose sol film is heated to obtain the cellulose / nanometer zinc oxide composite material of the present invention.

[0102] Wherein, the cellulose sol film is prepared as follows:

[0103] a) providing a cellulose solution;

[0104] b) coating the defoamed cellulose solution on a slide to obtain the cellulose sol film.

[0105] Specifically, the solvent of the cellulose solution is a mixed solution of sodium hydroxide, urea and water.

[0106] In a preferred example, the mass ratio of sodium hydroxide: urea: water in the solvent is 5-10: 10-15: 70-90.

[0107] Typically, the mass ratio of sodium hydroxide in the solvent: urea is 5-10:10-15.

[0108] Specifically, based on the total weight of the cellulose solution, the ...

Embodiment 1

[0133] Example 1 Composite material 1

[0134] Use cellulose powder with an average particle size of 50 μm

[0135] Step 1: Prepare the cellulose dissolving solution according to sodium hydroxide: urea: water = 7:12:81 (wt%), and put it into the refrigerator to pre-cool to -5-15°C. Add 8wt% cellulose to the pre-cooled dissolving solution, and stir for 3 minutes at a temperature lower than 5° C. to obtain a uniform and transparent cellulose solution.

[0136] Step 2: Centrifuge and degas the cellulose solution obtained in Step 1, apply a film on a glass slide, and let it stand for 10 minutes.

[0137] Step 3: Immerse the product obtained in Step 2 at room temperature in a 3.5 mM zinc chloride solution and let it stand for 10 hours to form a reverse-phase film of cellulose and nucleate zinc oxide.

[0138] Step 4: wash the resultant of step 3 with deionized water 3-5 times, and air-dry at room temperature to obtain composite material 1

[0139] result

[0140] The surface mo...

Embodiment 2

[0142] Example 2 Composite material 2

[0143] Use cellulose powder with an average particle size of 50 μm

[0144] Step 1: Prepare the cellulose dissolving solution according to sodium hydroxide: urea: water = 7:12:81 (wt%), and put it into the refrigerator to pre-cool to -5-15°C. Add 8wt% cellulose to the pre-cooled dissolving solution, and stir for 3 minutes at a temperature lower than 5° C. to obtain a uniform and transparent cellulose solution.

[0145] Step 2: Centrifuge and degas the cellulose solution obtained in Step 1, apply a film on a glass slide, and let it stand for 10 minutes.

[0146] Step 3: Immerse the product obtained in Step 2 at room temperature in a 3.5 mM zinc chloride solution and let it stand for 10 hours to form a reverse-phase film of cellulose and nucleate zinc oxide.

[0147] Step 4: The product obtained in step 3 was heated at 80° C. for 4 hours, and zinc oxide nanoparticles with a hierarchical structure were grown in situ on the surface of the ...

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Abstract

The invention relates to a cellulose/nano zinc oxide composite material, and in particular, the composite material comprises a cellulose layer and nano zinc oxide particles compounded to at least one main surface of the cellulose layer. The invention also discloses a preparation method and an application of the composite material. The composite material has high catalytic efficiency, has wide application prospects in photocatalytic degradation treatment of organic sewage, and also can effectively reduce generated potential threat of nano materials to biont and environment. The preparation method is cheap and renewable in raw materials, simple in preparation process, and beneficial to commercial promotion.

Description

technical field [0001] The invention belongs to the technical field of functional materials, and in particular relates to a cellulose / nanometer zinc oxide composite material, a preparation method thereof, and an application thereof in photocatalytic degradation of organic pollutants. Background technique [0002] In recent years, with the prosperity and development of modern industry, the number of organic pollutants produced by petroleum, printing and dyeing, chemical industry, agriculture and human daily life has increased rapidly. These organic pollutants have entered the water cycle system without reasonable treatment, causing serious damage to water resources. pollution. And the amount of these pollutants has far exceeded the self-purification ability of the natural environment, which has greatly threatened the safety of human drinking water. [0003] The treatment of water pollution has become one of the problems that need to be solved urgently. At present, the main ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/26C02F1/32
Inventor 曾志翔乌学东王赫王刚张琳贺怡薛群基
Owner 宁波海强装备科技有限公司
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