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Manufacturing method and application of Cr(VI) anion imprinted material

A technology of imprinting materials and anions, applied in chemical instruments and methods, other chemical processes, etc., to achieve the effects of high-efficiency chromium anion selective recognition ability, high adsorption capacity, and large specific surface area

Inactive Publication Date: 2015-09-30
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

To the best of our knowledge, the preparation of surface anion imprinted materials by establishing a bifunctional monomer prepolymerization system on the surface of the host material SBA-15 has not been reported

Method used

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  • Manufacturing method and application of Cr(VI) anion imprinted material
  • Manufacturing method and application of Cr(VI) anion imprinted material
  • Manufacturing method and application of Cr(VI) anion imprinted material

Examples

Experimental program
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Effect test

Embodiment 1

[0044] (1) Take 0.05g of activated mesoporous silica (SBA-15) and add it to 50mL ethanol solution. After ultrasonic dispersion for 10min, add 2.5mL of methacryloxypropyl trimethoxysilane ( MPS), and the mixed solution was placed in a 50° C. water bath, and magnetically stirred for 12 h. The product was collected by centrifugation and washed three times with a large amount of ethanol to remove unreacted coupling agent MPS. After vacuum drying at 50°C, SBA-15 modified with methacryloxypropyltrimethoxysilane was obtained.

[0045] (2) Take 0.1g of SBA-15 modified by methacryloxypropyltrimethoxysilane and add 40mL of methanol and water mixed solution with a volume ratio of 3:1 to ultrasonically disperse for 10min, and add 36.8mg K 2 Cr 2 o 7 , 43 μL methacrylic acid (MAA) and 54 μL 4-vinylpyridine (4-VP). The mixed solution was placed in an oil bath at 25°C, and magnetically stirred for 2 hours to form a pre-assembled system. Pass N 2 After deoxygenation for half an hour, u...

Embodiment 2

[0057] (1) Take 0.1g of activated mesoporous silica (SBA-15) and add it to 50mL of ethanol solution, after ultrasonic dispersion for 10min, add 5mL of methacryloxypropyltrimethoxysilane (MPS ), and the mixed solution was placed in a 50° C. water bath, and magnetically stirred for 12 h. The product was collected by centrifugation and washed three times with a large amount of ethanol to remove unreacted coupling agent MPS. After vacuum drying at 50°C, SBA-15 modified with methacryloxypropyltrimethoxysilane was obtained.

[0058] (2) Take 0.1g of SBA-15 modified by methacryloxypropyltrimethoxysilane and add 40mL of methanol and water mixed solution with a volume ratio of 3:1 to ultrasonically disperse for 10min, and add 73.5mg K 2 Cr 2 o 7 , 86 μL MAA and 108 μL 4-VP. The mixed solution was placed in an oil bath at 25°C, and magnetically stirred for 2 hours to form a pre-assembled system. Pass N 2 After deoxygenation for half an hour, 10 mmol EGDMA and 10 mg AIBN were adde...

Embodiment 3

[0070] (1) Take 0.2g of activated mesoporous silica (SBA-15) and add it to 50mL of ethanol solution, after ultrasonic dispersion for 10min, add 10mL of methacryloxypropyltrimethoxysilane (MPS ), and the mixed solution was placed in a 50° C. water bath, and magnetically stirred for 12 h. The product was collected by centrifugation and washed three times with a large amount of ethanol to remove unreacted coupling agent MPS. After vacuum drying at 50°C, SBA-15 modified with methacryloxypropyltrimethoxysilane was obtained.

[0071] (2) Take 0.1g of SBA-15 modified by methacryloxypropyltrimethoxysilane and add 40mL of methanol and water mixed solution with a volume ratio of 3:1 to ultrasonically disperse for 10min, and add 147mg K to the solution respectively 2 Cr 2 o 7 , 172 μL MAA and 216 μL 4-VP. The mixed solution was placed in an oil bath at 25°C, and magnetically stirred for 2 hours to form a pre-assembled system. Pass N 2 After deoxygenation for half an hour, under the...

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Abstract

The invention provides a manufacturing method and application of a Cr(VI) anion imprinted material. The material can be used for selectively adsorbing Cr(VI) anions. The material is prepared with SBA-15 modified by methacryloxypropyltrimethoxysilane as a substrate, potassium dichromate as template molecules, methacrylic acid and 4-vinylpyridine as bi-functional monomers, ethylene glycol dimethacrylate as a cross-linking agent and azodiisobutyronitrile as an initiator. The material is used for selectively adsorbing the Cr(VI) anions and has a very good adsorption effect. An imprinted polymer is grafted on the surface of mesoporous silica (SBA-15), and the problem that template ions are embedded too deep and are difficult to elute is avoided. The prepared Cr(VI) anion imprinted polymer is applied to dynamic adsorption experiments, and excellent regenerability is also presented.

Description

technical field [0001] The invention belongs to the technical field of material preparation and separation and detection, and relates to a preparation method and application of a Cr(VI) anion imprinting material, which can be used for selectively adsorbing Cr(VI) anions. Background technique [0002] Chromium (Cr) is a common metal pollutant in the environment. Due to industrial production activities such as electroplating, tanning, and metal processing, more and more chromium is discharged into the water environment. There are two main forms of chromium in water: Cr(III) cation and Cr(VI) anion. Cr(III) is an essential trace element for the human body. Unlike Cr(III), Cr(VI) is highly toxic and can lead to cancerous cells and even the death of living organisms. It is imminent to selectively separate Cr(VI) anions from environmental water . Adsorption is a commonly used and effective method for the treatment of heavy metal pollutants in water bodies. Therefore, it is of gr...

Claims

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Application Information

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IPC IPC(8): C08F292/00C08F230/08C08F220/06C08F226/06C08F222/14C08F2/44C08J9/26B01J20/30B01J20/26
Inventor 刘燕胡兆勇刘占超孟敏佳
Owner JIANGSU UNIV
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