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Preparation method and application of a mesoporous silicon composite lead ion imprinted polymer

A technology of ion imprinting and composite lead, which is applied in the preparation of mesoporous materials composite lead ion imprinting polymers, material preparation, and the application field of dynamic adsorption of lead ions, to solve the problem of uneven distribution of imprinted sites, solve pore blockage, and quickly The effect of preparation

Active Publication Date: 2017-04-12
JIANGSU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the method of combining molecular imprinting technology and cocondensation method to prepare mesoporous silicon composite lead ion imprinted polymer has not been reported yet.
In addition, most of the existing research on imprinted polymer materials focuses on the study of their static properties, which has great limitations in the actual application process. In order to guide practical applications, dynamic separation and detection research is very necessary for continuous flow systems

Method used

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  • Preparation method and application of a mesoporous silicon composite lead ion imprinted polymer

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) (Pb(NO 3 ) 2 ) and APTES, dissolved in 25mL deionized water, in which the concentration of Pb(II) in the control solution was 4mmol / L, and the concentration of APTES was 16mmol / L, stirred for 2h; 0.2gCTAB was dissolved in 25mL deionized water, and ultrasonically After 1h, add to the above solution, mix and stir for 1h;

[0026] (2) Use 2mol / L sodium hydroxide aqueous solution to adjust the pH of the mixed solution obtained in step (1) to 8.0. After stirring for 1 hour, add TEOS dropwise under the condition of 300rpm mechanical stirring, control the concentration of TEOS to 4 mmol / L, add dropwise After completion, mix and stir for 2h;

[0027] (3) Put the solid-liquid mixture obtained in step (2) into a 100mL high-temperature reactor, and place the reactor in an oven at 100°C for 48 hours;

[0028] (4) The solid product is collected by filtration, washed with a large amount of water, and then the template agent CTAB and template lead ions are eluted with a mixed s...

Embodiment 2

[0036] (1) Pb(NO 3 ) 2 and AAPTS, dissolved in 25mL deionized water, in which the concentration of Pb(II) in the control solution was 40mmol / L, the concentration of AAPTS was 160mmol / L, and stirred for 2h to obtain; 2.0g CTAB was dissolved in 25mL deionized water, 40°C After ultrasonication for 1h, add to the above solution, mix and stir for 1h;

[0037] (2) Adjust the pH of the mixed solution obtained in step (1) to 12.0 with 2mol / L aqueous sodium hydroxide solution, and after stirring for 1 hour, add TEOS dropwise under 500rpm mechanical stirring conditions, control the concentration of TEOS to 400mmol / L, and complete the dropwise addition After that, mix and stir for 2h;

[0038] (3) Put the solid-liquid mixture obtained in step (2) into a 100mL high-temperature reactor, and place the reactor in an oven at 150°C for 96 hours;

[0039] (4) The solid product was collected by filtration and washed with a large amount of water. Then, the template agent CTAB and template lea...

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Abstract

The invention discloses a mesoporous silicon composite lead ion imprinted polymer and its preparation method and use, and belongs to the technical field of material preparation and separation. The mesoporous silicon composite lead ion imprinted polymer is prepared from hexadecyl trimethyl ammonium bromide as a template, lead ions as template ions, aminopropyltriethoxysilane or N-aminoethyl-gamma-aminopropyltrimethoxysilane as a functional monomer, tetraethyl orthosilicate as a cross-linking agent and 2mol / L of a sodium hydroxide aqueous solution as an initiator. A selective dynamic adsorption experiment on selective recognition performances of the ion imprinted polymer proves that the mesoporous silicon composite lead ion imprinted polymer obtained by the preparation method has excellent lead ion identification performances.

Description

technical field [0001] The invention belongs to the technical field of material preparation and separation, and relates to a preparation method of a material for dynamically adsorbing lead ions in an aqueous solution, in particular to the preparation of a mesoporous material composite lead ion imprinted polymer and the application of dynamically adsorbing lead ions. Background technique [0002] With the development of the global economy and society, the wastewater discharged from mining, electroplating, paint, battery and other industries contains a large amount of lead ions, which will bring great harm to human health, animal and plant growth. Therefore, it is of great significance to establish a reliable method for the separation and determination of lead in environmental samples. At present, the separation and detection methods for environmental metal pollutants mainly include precipitation method, liquid-liquid extraction method, ion exchange method, solid phase extract...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G77/26C08J9/26B01J20/285G01N1/34
Inventor 刘占超胡兆勇高延敏孟祥国
Owner JIANGSU UNIV OF SCI & TECH
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