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Application of an electrochemical sensor for the detection of bisphenol-a in the dust of electronic waste dumps

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

Active Publication Date: 2022-07-26
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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  • Application of an electrochemical sensor for the detection of bisphenol-a in the dust of electronic waste dumps
  • Application of an electrochemical sensor for the detection of bisphenol-a in the dust of electronic waste dumps
  • Application of an electrochemical sensor for the detection of bisphenol-a in the dust of electronic waste dumps

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] The iron metal-organic framework MIL-100(Fe) was prepared by the following steps: First, 1.2 mmol of ferric nitrate nonahydrate and 1.0 mmol of trimellitic acid were dissolved in 5 mL of deionized water, which were uniformly dispersed by ultrasonic, and then mixed with The solution was transferred to a 10 mL autoclave and reacted at 180 °C for 12 h. After the reaction was completed, it was cooled naturally, and the obtained solid was centrifuged with deionized water, washed and dried to obtain MIL-100(Fe).

[0040] like figure 1 As shown, 0.96 mg of MIL-100(Fe) was added to 2 mL of ethanol-water mixture with a volume ratio of 1:1, and then 0.8 mg of CTAB and 20 μL of Nafion solution (5wt%, SIGMA- 274704), ultrasonically dispersed for 1 hour to obtain a CTAB / MIL-100(Fe) suspension, use a micro-injector to take 5 μL of the suspension and drop it on the surface of a glassy carbon electrode (3 mm in diameter), and let it dry naturally in the air. After drying, the CTAB / MIL...

Embodiment 2

[0044] The application of the new 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 platinum wire electrode as the counter electrode, calomel electrode as the reference electrode, the prepared CTAB / MIL-100(Fe) as the working electrode, 0.1mol / L phosphoric acid Buffer (Na 2 HPO 4 / NaH 2 PO 4, pH=7) as the supporting electrolyte solution. The glassy carbon electrode was first ground and polished on alumina polishing powder with a particle size of 50 nm, and then ultrasonically washed with deionized water and anhydrous ethanol in turn. The novel electrochemical sensor is divided into two steps in the detection of BPA. First, the molecular bisphenol A in solution was enriched and adsorbed onto the sensor surface; then, differential pulse voltammetry (DPV) scanning was used to oxidatively dissolve bisphenol A and the current-voltage curve of this pr...

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Abstract

The invention belongs to the technical field of sensors, and specifically discloses an electrochemical sensor for detecting bisphenol A and a preparation method and application thereof. The method includes the following steps: dispersing the precursor MIL-100(Fe) in an aqueous ethanol solution, then adding CTAB and Nafion solution, mixing uniformly to obtain a suspension, coating the suspension on the surface of the conductive substrate, and drying at room temperature. dry to obtain this novel electrochemical sensor. The present invention is an electrochemical sensor based on an iron metal-organic framework MIL-100 (Fe), and CTAB is modified on the MIL-100 (Fe) to enhance the ability of the electrode to absorb BPA and electron transport, thereby improving the electrochemical Electrocatalytic activity of the sensor. By optimizing deposition potential, deposition time and pH value, the detection limit of BPA can reach 2×10 ‑8 mol / L.

Description

technical field [0001] The invention belongs to the technical field of sensors, and in particular relates to an electrochemical sensor for detecting bisphenol A and a preparation method and application thereof. 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. BPA is also highly toxic to aquatic organisms due to its embryotoxicity, resulting in impaired immune function and increased risk of cancer. Therefore, for food safety, environmental monitoring and toxicity evaluation, a fast, sensitive and accurate method for the detection of BPA is required. Electrochemical sensing technology has been widely used in the detection of environmental pollutants and biomolecules due to its high sensitivity, simple operation, portability and miniaturization. At the same time, the electrochemical sensor also showed satisfactory results in the detection of ...

Claims

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Application Information

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Patent Type & Authority Patents(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
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