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Cucurbit[8]uril-ZnO nano-composite and preparation method and application thereof

A nanocomposite material and gourd technology, applied in the field of materials, can solve problems such as difficult regeneration and poor photocatalytic degradation effect, and achieve the effects of short reaction time, mild reaction conditions and simple operation

Active Publication Date: 2018-12-21
WUHAN TEXTILE UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a cucurbit [8] urea-ZnO nanocomposite material and its preparation method in order to overcome the difficulty of regeneration after dye adsorption by cucurbit [n] urea and the poor photocatalytic degradation effect of ZnO on high-concentration dyes and applications

Method used

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  • Cucurbit[8]uril-ZnO nano-composite and preparation method and application thereof
  • Cucurbit[8]uril-ZnO nano-composite and preparation method and application thereof
  • Cucurbit[8]uril-ZnO nano-composite and preparation method and application thereof

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preparation example Construction

[0030] The preparation method of CB[8]-ZnO nanocomposite of the present invention comprises the steps:

[0031] (1) prepare glycoluril;

[0032] (2) Mixing the glycoluril with concentrated hydrochloric acid for reaction, and then preparing cucurbit[8]uril through a water-salt separation method;

[0033] (3) prepare zinc nitrate aqueous solution, be called solution A; prepare sodium hydroxide solution, be called solution B; prepare the mixed solution of 1,2-propanediol and water, be called solution C;

[0034] (4) Mix solution C with the cucurbit [8] urea to obtain a mixed solution;

[0035] (5) Add the solution A to the mixed solution obtained in step (4), and stir to obtain a mixed solution;

[0036] (6) Add solution B dropwise to the mixed solution obtained in step (5) for reaction, and wash, dry, cool and grind the product.

[0037] In the method of the present invention, the mixing process of step (4) and step (5) and the dropping process of step (6) make the mixing bet...

Embodiment 1

[0065] To prepare sample A1, the specific steps are as follows:

[0066] (1) Dissolve 2.25mol of urea in 110mL of deionized water, adjust the pH to 1 with hydrochloric acid, mechanically stir evenly, then add 1mol, 40% glyoxal aqueous solution dropwise to it at a speed of 1 second / drop, and heat up to 80 ℃, react for 2 hours, cool and suction filter, wash with 2mol / L sodium hydroxide and deionized water until neutral, then wash with acetone, and dry in vacuum to obtain glycoluril;

[0067] (2) Add 130mL, 10mol / L concentrated hydrochloric acid into 37.7g glycoluril, continue to stir to obtain a transparent solution, continue to add paraformaldehyde, stir to make it into a solid solution state, slowly raise the temperature, and finally control the temperature at 102°C, After reacting for 2 hours and cooling to room temperature, the product was obtained by water-salt separation method to obtain CB[8];

[0068] (3) Dissolve 1.05g zinc nitrate hexahydrate in 1.5mL deionized water ...

Embodiment 2

[0073] according to figure 1 Sample A2 was prepared according to the procedure shown, and the specific steps were as follows:

[0074] (1) Dissolve 2.4 mol of urea in 110 mL of deionized water, adjust the pH to 2 with hydrochloric acid, stir evenly, then add 1 mol, 40% glyoxal aqueous solution dropwise at a rate of 1 second / drop, and heat up to 85°C , reacted for 3h, cooled and suction filtered, washed with 2mol / L sodium hydroxide and deionized water until neutral, then washed with acetone, and dried in vacuum to obtain glycoluril;

[0075] (2) Add 130mL, 10mol / L concentrated hydrochloric acid into 38.35g glycoluril, continue to stir to obtain a transparent solution, continue to add paraformaldehyde, stir to make it into a solid solution state, slowly raise the temperature, and finally control the temperature at 104°C, After reacting for 4 hours and cooling to room temperature, the product was obtained by water-salt separation method to obtain CB[8];

[0076] (3) Dissolve 0....

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Abstract

The invention relates to the field of materials and discloses a cucurbit[8]uril-ZnO nano-composite and an preparation method and application thereof. The cucurbit[8]uril-ZnO nano-composite contains cucurbit[8]uril and ZnO, wherein ZnO is adhered to the surface of the cucurbit[8]uril in the form of particles. The CB[8]-ZnO nano-composite prepared through the method provided by the invention can absorb ultraviolet-visible light and has the characteristics of adsorption and photocatalysis activity of light degradation of reactive brilliant red X-3B, and good photochemical stability.

Description

technical field [0001] The invention relates to the field of materials, in particular to a cucurbit [8] urea-ZnO nanocomposite material and a preparation method and application thereof. Background technique [0002] my country is a big dye production and export country, but with the rapid development of the printing and dyeing industry, a large amount of industrial wastewater containing dyes will be discharged into the water every year. The water quality of this kind of wastewater changes greatly, the color is deep, the COD concentration is high, the toxicity is strong, and it is difficult to biodegrade. Therefore, a large amount of dye wastewater has entered the water environment, which has become one of the important factors threatening the safety of my country's water environment. Wastewater treatment methods are generally divided into physical, chemical and biological methods, all of which have their own advantages and disadvantages. Among them, the adsorption method i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/28C02F1/30B01J20/26B01J20/30B01J31/26C02F101/30
CPCC02F1/285C02F1/30B01J20/26B01J31/26C02F2101/308C02F2305/10B01J35/39
Inventor 李伟李澜
Owner WUHAN TEXTILE UNIV
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