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Magnetic quantum dot molecular imprinting material and application for detecting bisphenol A

A technology of molecular imprinting and quantum dots, applied in the field of analysis and sensing, can solve problems such as complex polymerization process, long aggregation time, and small detection range

Active Publication Date: 2021-01-19
ANHUI UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The traditional molecular imprinting technology has low application value due to its complex polymerization process, long aggregation time and small detection range, which hinders the development

Method used

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  • Magnetic quantum dot molecular imprinting material and application for detecting bisphenol A
  • Magnetic quantum dot molecular imprinting material and application for detecting bisphenol A
  • Magnetic quantum dot molecular imprinting material and application for detecting bisphenol A

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] (1) Synthesis of cadmium selenide quantum dots

[0058] The specific process is as follows: the CdCl 2 2.5H 2 O and L-cysteine ​​(the molar ratio of which is 3:1) and 150 mL of deionized water were mixed, the pH was adjusted to 10 by 0.1M NaOH, and the cadmium (Cd) source was obtained by magnetic stirring reaction under the protection of nitrogen. Simultaneously synthesized selenium (Se) source: In a round bottom flask, Se: NaBH 4 =1.5 (molar ratio), add 10 mL of deionized water, heat to 40° C., and fill with nitrogen gas for 30 min. The synthesized Se source solution was poured into the Cd source solution, heated to 90°C, condensed and refluxed for reaction. The obtained product was settled with ethanol and centrifuged and washed three times with ethanol, dissolved in water and stored in a refrigerator at 4°C in the dark.

[0059] (2) Fe 3 o 4 @SiO 2 -NH 2 Synthesis

[0060] FeCl 3 ·6H 2 O (1.35g) was put into a 100mL dry beaker, 50mL of ethylene glycol was ...

Embodiment 2

[0074] (1) Synthesis of cadmium selenide quantum dots

[0075] The specific process is as follows: the CdCl 2 2.5H 2 O and L-cysteine ​​(the molar ratio of which is 3:1) and 150 mL of deionized water were mixed, the pH was adjusted to 10 by 0.1 M NaOH, and the cadmium (Cd) source was obtained by magnetic stirring reaction under the protection of nitrogen. Simultaneously synthesized selenium (Se) source: In a round bottom flask, Se: NaBH 4 =1.5 (molar ratio), add 10 mL of deionized water, heat to 40° C., and fill with nitrogen gas for 30 min. The synthesized Se source solution was poured into the Cd source solution, heated to 90°C, condensed and refluxed for reaction. The obtained product was settled with ethanol and centrifuged and washed three times with ethanol, dissolved in water and stored in a refrigerator at 4°C in the dark.

[0076] (2) Fe 3 o 4 @SiO 2 -NH 2 Synthesis

[0077] FeCl 3 ·6H 2O (1.35g) was put into a 100mL dry beaker, 50mL of ethylene glycol was ...

Embodiment 3

[0084] (1) Synthesis of cadmium selenide quantum dots

[0085] The specific process is as follows: the CdCl 2 2.5H 2 O and L-cysteine ​​(the molar ratio of which is 3:1) and 150 mL of deionized water were mixed, the pH was adjusted to 10 by 0.1M NaOH, and the cadmium (Cd) source was obtained by magnetic stirring reaction under the protection of nitrogen. Simultaneously synthesized selenium (Se) source: In a round bottom flask, Se: NaBH 4 =1.5 (molar ratio), add 10 mL of deionized water, heat to 40° C., and fill with nitrogen gas for 30 min. The synthesized Se source solution was poured into the Cd source solution, heated to 90°C, condensed and refluxed for reaction. The obtained product was precipitated with ethanol and washed three times by centrifugation with ethanol, dissolved in water and stored in a refrigerator at 4°C in the dark.

[0086] (2) Fe 3 o 4 @SiO 2 -NH 2 Synthesis

[0087] FeCl 3 ·6H 2 O (1.35g) was put into a 100mL dry beaker, 50mL of ethylene glyc...

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Abstract

The invention provides a magnetic quantum dot molecular imprinting material used for detecting bisphenol A and application, and belongs to the technical field of analytic sensing. An electrochemiluminescence sensor of a molecular imprinting compound based on doping of a magnetic material and quantum dots is disclosed, and precise detection of an environmental hormone bisphenol A is achieved by utilizing the specific recognition effect of a molecular imprinting technique, the efficient separating and electrode modification effect of a magnetic composite structure and the high-sensitivity response of electrochemiluminescence signals of the quantum dots to bisphenol A, wherein the concentration detection range of bisphenol A is from 1*10<-9> M to 1*10<-4> M, and the detection limit is 3.4*10<-10> M. The sensor is high in sensitivity and selectivity, convenient to operate, good in stability, high in reproducibility and the like, and a novel and effective method is provided for the detection of environment hormones of industrial water, rivers and the like, and has a significant application prospect.

Description

technical field [0001] The invention belongs to the field of analysis and sensing, and more specifically relates to a magnetic quantum dot molecularly imprinted material for detecting bisphenol A, a preparation method and an application. Background technique [0002] Bisphenol A is a kind of environmental endocrine disruptors. In the chemical industry, it is widely used in the production of heat-resistant coatings and adhesives for polycarbonate plastics and epoxy resins; baby bottles, medical equipment and plastic products, etc. Contains more or less bisphenol A. When these items are heated above 100°C, bisphenol A will be released, and then enter the human body through different channels, causing the endocrine system of the human body to be out of balance, and then threatening the health of the human body, such as affecting the development of infants and young children, and inducing cancer. and various other bodily disorders. [0003] Based on the above-mentioned hazards...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/76
CPCG01N21/76
Inventor 石建军张倩倩王焱庞振东
Owner ANHUI UNIV OF SCI & TECH
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