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Electrochemical sensor for detecting bisphenol A as well as preparation method and application thereof

An electrochemical and sensor technology, applied in the field of sensors, can solve problems such as impaired immune function, toxicity, and increased risk of cancer, and achieve the effect of optimizing deposition potential and improving electrocatalytic activity

Active Publication Date: 2020-10-30
JINAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because bisphenol A has certain embryo toxicity, it can cause impaired immune function and increase the risk of cancer, and it is also extremely toxic to aquatic organisms

Method used

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  • Electrochemical sensor for detecting bisphenol A as well as preparation method and application thereof
  • Electrochemical sensor for detecting bisphenol A as well as preparation method and application thereof
  • Electrochemical sensor for detecting bisphenol A as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The metal-organic framework MIL-100(Fe) of iron was prepared by the following steps: firstly, 1.2 mmol of ferric nitrate nonahydrate and 1.0 mmol of benzenetricarboxylic acid were dissolved in 5 mL of deionized water, dispersed by ultrasonic, and then mixed The solution was transferred to a 10mL autoclave and reacted at 180°C for 12h. After the reaction, it was cooled naturally, and the obtained solid was centrifuged with deionized water, washed and dried to prepare MIL-100(Fe).

[0039] Such as figure 1 As shown, add 0.96mg of MIL-100(Fe) to 2mL of ethanol-water mixture with a volume ratio of 1:1, and then add 0.8mg of CTAB and 20μL of Nafion solution (5wt%, SIGMA-274704) to the solution , ultrasonically dispersed for 1 hour to obtain a suspension of CTAB / MIL-100 (Fe), and 5 μL of the suspension was dropped on the surface of a glassy carbon electrode (diameter 3 mm) with a micro-injector, and dried naturally in the air, that is A CTAB / MIL-100 (Fe) electrochemical sens...

Embodiment 2

[0043] Application of the novel electrochemical sensor prepared in Example 1 in the detection of bisphenol A. The details are as follows: the detection is completed in a traditional three-electrode system, using a platinum wire electrode as a counter electrode, a calomel electrode as a reference electrode, prepared CTAB / MIL-100 (Fe) as a working electrode, and 0.1mol / L phosphoric acid Buffer (Na 2 HPO 4 / NaH 2 PO 4 , pH=7) as a supporting electrolyte solution. The glassy carbon electrode was first ground and polished on alumina polishing powder with a particle size of 50nm, and then ultrasonically washed with deionized water and absolute ethanol in sequence. The novel electrochemical sensor is divided into two steps in the process of detecting BPA. First, the molecular state of bisphenol A in the solution is enriched and adsorbed on the surface of the sensor; then, the differential pulse voltammetry (DPV) scan is used to oxidize and dissolve bisphenol A and record the cur...

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Abstract

The invention belongs to the technical field of sensors, and particularly discloses an electrochemical sensor for detecting bisphenol A as well as a preparation method and application of the electrochemical sensor. The method comprises the following steps: dispersing a precursor MIL-100 (FE) in an ethanol aqueous solution, adding CTAB and Nafion solutions, uniformly mixing to obtain a suspension,coating the surface of a conductive substrate with the suspension, and airing at normal temperature to obtain the novel electrochemical sensor. According to the electrochemical sensor, an iron metal organic framework MIL-100 (FE) is used as a substrate, CTAB is modified on the MIL-100 (FE), so that the BPA adsorption capacity and the electron transport capacity of an electrode are enhanced, and the electro-catalytic activity of the electrochemical sensor is improved. By optimizing the deposition potential, the deposition time and the pH value, the detection limit of bisphenol A can reach 2 * 10 <-8 > mol / L.

Description

technical field [0001] The invention belongs to the technical field of sensors, in particular to an electrochemical sensor for detecting bisphenol A, its preparation method and application. Background technique [0002] Bisphenol A (BPA) is an organic chemical raw material commonly used in food packaging and containers, as well as in the production of electronic products. Because bisphenol A has certain embryo toxicity, it can cause impaired immune function and increase the risk of cancer, and it is also extremely toxic to aquatic organisms. Therefore, for food safety, environmental monitoring, and toxicity evaluation, a rapid, sensitive, and accurate method for the detection of BPA is needed. Electrochemical sensing technology has been widely used in the detection of environmental pollutants and biomolecules due to its high sensitivity, easy operation, portability and miniaturization. At the same time, the electrochemical sensor also shows satisfactory results in the dete...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/26G01N27/48
CPCG01N27/26G01N27/48
Inventor 朱明山李志胡佳月查庆兵
Owner JINAN UNIVERSITY