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SiO2 granule surface molecule print adsorption agent and preparation thereof

A molecular imprinting, particle surface technology, applied in chemical instruments and methods, other chemical processes, silicon compounds, etc., can solve the problems of reduced recognition ability and service life, and achieve the effect of fast equilibrium speed, simple preparation process and wide range

Inactive Publication Date: 2008-08-06
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to solve the disadvantages of the prior art, such as the need to use a large amount of toxic organic solvents when synthesizing molecularly imprinted adsorbents and the decrease in recognition ability and service life due to the mismatch of solvent polarity during use, thus providing an all-water SiO in the phase system 2 Particle surface molecularly imprinted adsorbent and preparation method thereof

Method used

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  • SiO2 granule surface molecule print adsorption agent and preparation thereof
  • SiO2 granule surface molecule print adsorption agent and preparation thereof
  • SiO2 granule surface molecule print adsorption agent and preparation thereof

Examples

Experimental program
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Effect test

example 1

[0044] Example 1: (1) Add 3g SiO to the beaker 2 and 50mL 0.25mol L -1 NaOH solution, stirred and reacted at 25°C for 60 min, washed until the eluent was neutral, and filtered with suction. The resulting SiO 2 Particles added to 50mL 2.0mol L -1 In HCl solution, stir and react at 25°C for 60 minutes, wash until the eluent is neutral, filter with suction, and dry to obtain activated SiO 2 particles;

[0045] (2) 1g of activated SiO 2 Add the particles to a 5% ethanol solution of 3-aminopropyltriethoxysilane by volume, stir and react at a temperature of 40°C for 12h, wash with ethanol to remove unreacted 3-aminopropyltriethoxysilane , suction filtration, and vacuum drying to obtain aminated SiO 2 particles;

[0046] (3) Add 0.01mol of o-phenylenediamine and 0.001mol of 2,4-dinitrophenol into another beaker, then add 100mL of distilled water, and stir and react at 45°C for 30min;

[0047] (4) Add 1 g of aminated SiO to the beaker 2 Particles, ultrasonically dispersed for...

example 2

[0050] Example 2: (1) Add 12g SiO to the beaker 2 and 50mL 0.5mol L -1 NaOH solution, stirred and reacted at 45°C for 10 min, washed until the eluent was neutral, and filtered with suction. The resulting SiO 2 Particles added to 50mL 1.0mol L -1 In HCl solution, stir and react at 40°C for 60 minutes, wash until the eluent is neutral, filter with suction, and dry to obtain activated SiO 2 particles;

[0051] (2) 10g of activated SiO 2 Add the particles to a 2% ethanol solution of 3-aminopropyltriethoxysilane by volume, stir and react at a temperature of 40°C for 15h, wash with ethanol to remove unreacted 3-aminopropyltriethoxysilane , suction filtration, and vacuum drying to obtain aminated SiO 2 particles;

[0052] (3) Add 0.1 mol of aniline and 0.001 mol of 2,6-dichlorophenol into another beaker, then add 50 mL of distilled water, and stir at 50°C for 30 minutes;

[0053] (4) Add 6g of aminated SiO to the beaker 2 Particles, ultrasonically dispersed for 5 minutes to...

example 3

[0056] Example 3: (1) Add 6g SiO to the beaker 2 and 50mL 1.0mol L -1 NaOH solution, stirred and reacted at 25°C for 30 min, washed until the eluent was neutral, and filtered with suction. The resulting SiO 2 Particles added to 50mL 2.0mol L -1 In HCl solution, stir and react at 35°C for 200min, wash until the eluent is neutral, filter with suction, and dry to obtain activated SiO 2 particles;

[0057] (2) 2g of activated SiO 2 The particles were added to the ethanol solution of 3-aminopropyltriethoxysilane with a volume ratio of 6%, stirred and reacted at a temperature of 40°C for 6h, and washed with ethanol to remove unreacted 3-aminopropyltriethoxysilane , suction filtration, and vacuum drying to obtain aminated SiO 2 particles;

[0058] (3) Add 0.1 mol of o-phenylenediamine and 0.05 mol of 4-nitrophenol into another beaker, then add 75 mL of distilled water, and stir and react at 45°C for 60 min;

[0059] (4) Add 1.5g of aminated SiO to the beaker 2 Particles, ult...

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PUM

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Abstract

The invention provides a molecular blot absorbent of a SiO2 particle surface in a water phase system and a preparation method thereof, which overcomes the defects of low identification ability and low service life caused by mismatched solvent polarity or by using toxic organic solvent in synthesis in the prior art. The preparation method is provided with the following steps: firstly, activating treatment is adopted to SiO2 particles, and the particles react with a functional monomer and target phenolic pollutants such as one of chlorophenols or nitrophenol to form a complex type precursor body; the molecular blot absorbent of the SiO2 particle surface is obtained through polymerization and post treatment after the re-oxidation. The molecular blot absorbent of the invention is simple in preparation technique and low in cost; the absorbent has high selectivity in target molecules, a fast balancing speed in absorption and de-sorption and can be repeatedly used.

Description

technical field [0001] The present invention relates to a SiO 2 Particle surface molecularly imprinted adsorbent and preparation method thereof, especially related to SiO in all-aqueous phase system 2 Particle surface molecularly imprinted adsorbent and preparation method thereof. technical background [0002] Phenolic compounds are an important class of chemical raw materials, widely used as fungicides, herbicides, insecticides and wood preservatives. Phenolic compounds are easy to accumulate in animals, causing liver, kidney and nerve damage in animals. The widespread use of phenolic compounds has caused soil and groundwater pollution worldwide. Therefore, it is of great significance to enrich, detect and remove phenolic compounds in the environment. [0003] Determination of trace phenolic compounds in environmental samples often requires enrichment. The commonly used enrichment methods are liquid-liquid extraction and solid phase extraction. In comparison, solid-ph...

Claims

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Application Information

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IPC IPC(8): B01J20/10B01J20/30
Inventor 朱丽华罗玮沈先涛唐和清
Owner HUAZHONG UNIV OF SCI & TECH
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