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A kind of multifunctional molecularly imprinted nanosensor and its preparation method and application

A nanosensor and molecular imprinting technology, applied in the direction of nanotechnology, nanotechnology, nanotechnology for sensing, etc., can solve the problems of reducing the selectivity of detection methods, achieve low material prices, simple preparation methods, and improve selectivity and the effect of sensitivity

Inactive Publication Date: 2015-10-14
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] In recent years, molecular imprinting technology has been widely used in the analysis and detection of toxic and harmful substances due to its inherent stability and specific recognition ability. structure, which greatly reduces the selectivity of this detection method, so it is urgent to develop a simple method with high selectivity and sensitivity

Method used

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  • A kind of multifunctional molecularly imprinted nanosensor and its preparation method and application
  • A kind of multifunctional molecularly imprinted nanosensor and its preparation method and application
  • A kind of multifunctional molecularly imprinted nanosensor and its preparation method and application

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Effect test

Embodiment 1

[0021] 1. Take 30mg polystyrene-methacrylic acid copolymer (molecular weight is 26232, the molar ratio of monomer styrene and methacrylic acid is 95:5), 10mg phenanthrene, 150μL LaVO 4 :Eu 3+ Nano-luminescent material and 100μL Fe 3 o 4 Nanoparticles in a small centrifuge tube, add chloroform to a volume of 1mL;

[0022] 2. Take 70 μL of NaOH solution with a concentration of 10 mg / mL and add it to 10 mL of deionized water;

[0023] 3. Pour the solution in step 2 into the mixture in step 1, use an ultrasonic cell disruptor to sonicate 60 times at 350w power, 3s each time, then stir the product at constant temperature and magnetic force for 2h at 60°C, and centrifuge with deionized water Wash twice, and finally disperse in 5mL ethanol to obtain a multifunctional molecularly imprinted nanosensor.

[0024] The LaVO 4 :Eu 3+ Nanoluminescent material, Eu 3+ The molar doping amount is 2%, the dispersion solvent is chloroform, and the concentration is 1mmol / mL.

[0025] The Fe...

Embodiment 2

[0028] 1. Take 30mg polystyrene-methacrylic acid copolymer (molecular weight is 26232, the molar ratio of monomer styrene and methacrylic acid is 95:5), 10mg phenanthrene, 100μL LaVO 4 :Eu 3+ Nano-luminescent material and 100μL Fe 3 o 4 Nanoparticles in a small centrifuge tube, add chloroform to a volume of 1mL;

[0029] 2. Take 70 μL of NaOH solution with a concentration of 10 mg / mL and add it to 10 mL of deionized water;

[0030] 3. Pour the solution in step 2 into the mixture in step 1, use an ultrasonic cell disruptor to sonicate 60 times at 350w power, 3s each time, then stir the product at constant temperature and magnetic force for 2h at 60°C, and centrifuge with deionized water Wash twice, then disperse with 5mL acetone, and magnetically stir for 20min, wash away the template phenanthrene, and centrifuge. This washing process is repeated twice, and finally dispersed in 5mL ethanol to obtain a multifunctional molecularly imprinted nanosensor.

[0031] The LaVO 4 :E...

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Abstract

The invention discloses a multi-functional molecular imprinting nano sensor as well as a preparation method and an application of the sensor in polycyclic aromatic hydrocarbon phenanthrene detection, belonging to the technical field of nano material preparation. The synthesized multi-functional molecular imprinting nano sensor with both magnetism and light emission consists of monodisperse grains which are uniform in size, range from 90nm to 100nm in diameter and can stably exist in ethanol and water for a long time, and the monodisperse grains have the specific recognition capability for polycyclic aromatic hydrocarbon phenanthrene. The sensor is simple in preparation method and low in material price, and in particular interference of other polycyclic aromatic hydrocarbons (anthracene, pyrene, perylene) of similar structures can be eliminated. What is worth mentioning is that the method breaks through the convention that magnetic substances are generally applied to separation and enrichment, magnetic grains are used for improving the selectivity of a detection method for the first time, the polycyclic aromatic hydrocarbon phenanthrene is subjected to qualitative and quantitative detection, and the selectivity and the sensitivity are improved.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation, and in particular relates to a multifunctional molecularly imprinted nanosensor, a preparation method thereof and an application in the detection of polycyclic aromatic hydrocarbon phenanthrene. Background technique [0002] In recent years, molecular imprinting technology has been widely used in the analysis and detection of toxic and harmful substances due to its inherent stability and specific recognition ability. The structure greatly reduces the selectivity of this detection method, so it is urgent to develop a simple method with high selectivity and sensitivity. Contents of the invention [0003] In view of the above prior art, the technical problem to be solved by the present invention is to provide a multifunctional molecularly imprinted nanosensor capable of selectively detecting polycyclic aromatic hydrocarbon phenanthrene in a solution state and a preparation method ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/64B82Y15/00B82Y40/00
Inventor 汪乐余李浩
Owner BEIJING UNIV OF CHEM TECH
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