Antibacterial photocatalyst composite hydrogel for removing heavy metals

A composite hydrogel and photocatalyst technology, applied in the direction of alkali metal compounds, alkali metal oxides/hydroxides, water pollutants, etc., can solve structural damage, decreased adsorption capacity, poor comprehensive performance of hydrogel water treatment, etc. problem, to achieve the effect of capturing sensitivity

Inactive Publication Date: 2020-08-07
HUNAN CHENLI NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the comprehensive performance of the hydrogel prepared by this method is poor, and it is easy to be polluted by microorganisms, resulting in structural damage and a decrease in adsorption capacity.

Method used

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  • Antibacterial photocatalyst composite hydrogel for removing heavy metals

Examples

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Comparison scheme
Effect test

Embodiment 1

[0024] A cyclodextrin-based photocatalyst composite hydrogel is a composite hydrogel with a three-dimensional network structure, containing a large amount of amino groups that chelate heavy metal ions, carboxylates, and nanometer titanium dioxide with photocatalyst function, and its preparation method is as follows:

[0025] a. Preparation of polyamino-modified cyclodextrin containing double bonds: Disperse 6 parts of α-cyclodextrin into 12 parts of water, and then slowly add 8 parts of 13% potassium hydroxide aqueous solution to it until the system is transparent to obtain solution I ; Add 10 parts of p-toluenesulfonyl chloride and 15 parts of acetonitrile to the reactor, add solution I dropwise to it, 0.5h dripping is completed, continue the reaction at room temperature for 4h, end the reaction and suction filtration, the filtrate is placed in the refrigerator Overnight, a large amount of white precipitate is precipitated, and a white solid is obtained by suction filtration. The...

Embodiment 2

[0028] A cyclodextrin-based photocatalyst composite hydrogel is a composite hydrogel with a three-dimensional network structure, containing a large amount of amino groups that chelate heavy metal ions, carboxylates, and nanometer titanium dioxide with photocatalyst function, and its preparation method is as follows:

[0029] a. Preparation of polyamino-modified cyclodextrin containing double bonds: Disperse 5 parts of γ-cyclodextrin into 12 parts of water, and then slowly add 8 parts of 10% sodium hydroxide aqueous solution to it until the system is transparent to obtain solution I ; Add 15 parts of p-toluenesulfonyl chloride and 18 parts of acetonitrile to the reactor, add solution I dropwise to it, after 1h dripping, continue the reaction at room temperature for 5h, end the reaction and filter with suction, and place the filtrate in the refrigerator Overnight, a large amount of white precipitate was precipitated, and a white solid was obtained by suction filtration. The white so...

Embodiment 3

[0032] A cyclodextrin-based photocatalyst composite hydrogel is a composite hydrogel with a three-dimensional network structure, containing a large amount of amino groups that chelate heavy metal ions, carboxylates, and nanometer titanium dioxide with photocatalyst function, and its preparation method is as follows:

[0033] a. Preparation of polyamino-modified cyclodextrin containing double bonds: Disperse 7 parts of β-cyclodextrin into 13 parts of water, and then slowly add 7 parts of 14% sodium hydroxide aqueous solution to it until the system is transparent to obtain solution I ; Add 9 parts of p-toluenesulfonyl chloride and 20 parts of acetonitrile to the reactor, add solution I dropwise to it, after 0.6h dripping, continue the reaction at room temperature for 4.5h, end the reaction and filter with suction, and place the filtrate Overnight in the refrigerator, a large amount of white precipitate precipitated, suction filtration to obtain a white solid, dissolve the white soli...

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Abstract

The invention relates to an antibacterial photocatalyst composite hydrogel for removing heavy metals, wherein the antibacterial photocatalyst composite hydrogel is cyclodextrin, nano titanium dioxideand acrylamide copolymer composite hydrogel synthesized by adopting an instantaneous gel method, has a three-dimensional network structure, and structurally contains amino groups and carboxylate radicals of a large amount of chelated heavy metal ions and nano titanium dioxide with a photocatalyst effect. The antibacterial photocatalyst composite hydrogel for removing the heavy metals can adsorb metal ions in water and is high in adsorption efficiency; wide application prospects are realized in the fields of ion adsorption and industrial sewage treatment.

Description

[0001] The present invention is a divisional application of the Chinese patent "A cyclodextrin-based photocatalyst composite hydrogel and its preparation method", the application date is November 27, 2017, and the application number is 201711208765.4. Technical field [0002] The invention relates to a hydrogel film, in particular to a photocatalyst composite hydrogel for antibacterial and heavy metal removal, and belongs to the technical field of water treatment. [0003] technical background [0004] my country is a water shortage country. The per capita water resources are only 1 / 4 of the world, and the distribution of water resources is seriously uneven. How to alleviate water scarcity and pollution has become an urgent issue. The pollution of heavy metal ions harms the water environment and the entire ecosystem through accumulation of water bodies, and can endanger human health through direct contact or through the food chain. How to quickly and efficiently remove heavy metal i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/075C08J3/24C08L51/02C08K3/22C08K3/16C08K3/38C08F251/00C08F220/06C08F222/02C08F220/56C08B37/16B01J20/24B01J20/30B01J20/28C02F1/28C02F101/20C02F101/22
CPCB01J20/06B01J20/24B01J20/28047C02F1/286C02F2101/20C02F2101/22C08B37/0012C08F251/00C08J3/075C08J3/24C08J2351/02C08K3/36C08K3/38C08K2003/162C08F220/06C08F222/02
Inventor 万章文
Owner HUNAN CHENLI NEW MATERIAL CO LTD
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