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Preparation method of Cr (III) ion imprinted material based on surface of MCM-41 molecular sieve

A technology of MCM-41 and ion imprinting, which is applied in the field of preparation of Cr ion imprinting materials, can solve the problems of slow mass transfer and difficult elution, and achieve good mechanical properties, good adsorption, and large specific surface area. Effect

Inactive Publication Date: 2020-10-02
GUILIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional ion imprinting preparation method recognizes that the recognition sites are distributed in the imprinted material, and some of the recognition sites are embedded too deeply so that the template ions cannot reach and there are failure sites, and the mass transfer speed is slow and it is difficult to elute.

Method used

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  • Preparation method of Cr (III) ion imprinted material based on surface of MCM-41 molecular sieve
  • Preparation method of Cr (III) ion imprinted material based on surface of MCM-41 molecular sieve

Examples

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Effect test

Embodiment 1

[0013] A preparation method based on the Cr(Ⅲ) ion imprinted material on the MCM-41 molecular sieve surface, comprising the steps:

[0014] (1) Preparation of MCM-41: Weigh 1.2 g of cetyltrimethylammonium bromide into a three-necked flask, and simultaneously measure 90 mL of ammonia water and 130 mL of distilled water into the three-necked flask. Stir at 60°C until cetyltrimethylammonium bromide is completely dissolved. Under vigorous stirring, 5 mL of ethyl orthosilicate was slowly added dropwise, and stirred at a constant speed, and reacted for 6 hours. Stop the reaction and pour it out while it is hot. At room temperature, it crystallizes for 3d. The solid particles were washed to neutral and dried. Burn in a muffle furnace at 550°C for 6 hours to remove hexadecyltrimethylammonium bromide to obtain MCM-41;

[0015] (2) Weigh 0.2mmol of chromium sulfate hexahydrate solid in a three-necked flask, then add 10mL of ultrapure water to fully dissolve it, then weigh 80-100mL of...

Embodiment 2

[0020] (1) Preparation of MCM-41: Weigh 1.2 g of cetyltrimethylammonium bromide into a three-necked flask, and simultaneously measure 90 mL of ammonia water and 130 mL of distilled water into the three-necked flask. Stir at 60°C until cetyltrimethylammonium bromide is completely dissolved. Under vigorous stirring, 5 mL of ethyl orthosilicate was slowly added dropwise, and stirred at a constant speed, and reacted for 6 hours. Stop the reaction and pour it out while it is hot. At room temperature, it crystallizes for 3d. The solid particles were washed to neutral and dried. Burn in a muffle furnace at 550°C for 6 hours to remove hexadecyltrimethylammonium bromide to obtain MCM-41;

[0021] (2) Weigh 0.25 mmol of chromium sulfate hexahydrate solid in a three-necked flask, then add 10 mL of ultrapure water to fully dissolve it, then weigh 80-100 mL of methanol and add it to the three-necked flask, mix well, and then add 2 mL of N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane, re...

Embodiment 3

[0026] (1) Preparation of MCM-41: Weigh 1.2 g of cetyltrimethylammonium bromide into a three-necked flask, and simultaneously measure 90 mL of ammonia water and 130 mL of distilled water into the three-necked flask. Stir at 60°C until cetyltrimethylammonium bromide is completely dissolved. Under vigorous stirring, 5 mL of ethyl orthosilicate was slowly added dropwise, and stirred at a constant speed, and reacted for 6 hours. Stop the reaction and pour it out while it is hot. At room temperature, it crystallizes for 3d. The solid particles were washed to neutral and dried. Burn in a muffle furnace at 550°C for 6 hours to remove hexadecyltrimethylammonium bromide to obtain MCM-41;

[0027] (2) Weigh 0.3 mmol of chromium sulfate hexahydrate solid in a three-necked flask, then add 10 mL of ultrapure water to fully dissolve it, then weigh 80-100 mL of methanol and add it to the three-necked flask, mix well, and then add 2 mL of N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane, rea...

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Abstract

The invention discloses a preparation method of a Cr (III) ion imprinted material based on the surface of an MCM-41 molecular sieve. According to the method, N-(beta-aminoethyl)-gamma-aminopropyltrimethoxysilane is used as a functional monomer, epoxy chloropropane is used as a cross-linking agent, mesoporous MCM-41 is used as a carrier, and the Cr (III) ion imprinted material based on the surfaceof an MCM-41 molecular sieve is prepared by adopting a surface imprinting method. The mesoporous MCM-41 Cr (III) ion imprinted adsorption material disclosed by the invention has a specific three-dimensional hole structure, is good in mechanical property and easy to elute, can be used for specific recognition and selective removal of Cr (III) ions in an aqueous solution, and has the advantages of low cost, environment-friendliness and the like.

Description

technical field [0001] The invention belongs to the technical field of preparation of environmental functional materials, and in particular relates to a preparation method of a Cr(III) ion imprinted material on the surface of MCM-41 molecular sieve. Background technique [0002] Cr(Ⅲ) ions are highly toxic and tend to enrich aquatic organisms and the human body, leading to the "three hazards" of teratogenicity, carcinogenicity, and mutagenicity. Most of the traditional treatment methods use adsorption, which has the advantages of low cost and simple operation, but lacks pertinence and blindness to target ions. Therefore, it is particularly important to research and develop an adsorption material that can selectively separate target ions. [0003] Ion imprinting technology refers to a technology that has a selective and specific recognition function for target ions. Ion imprinted polymers use anions and cations as templates to interact with functional monomers through special...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/30C02F1/28C02F101/22
CPCB01J20/268B01J20/3057C02F1/285C02F2101/22
Inventor 弓亮彭芃杨勤桃黄丽丽解庆林陈南春
Owner GUILIN UNIVERSITY OF TECHNOLOGY
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