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Preparation method and application of a cds-sensitized tio2 environmental estrogen photoelectrochemical sensor

A technology of environmental estrogen and photoelectrochemistry, which is applied in the field of biosensing and detection of new functional materials and environmental pollutants. Low limit, improve the effect of photoelectric conversion efficiency

Active Publication Date: 2016-01-20
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the methods for environmental estrogen detection at home and abroad mainly include high performance liquid chromatography, immunological methods, electrochemical methods, biological analysis methods, etc., but most of them need expensive instruments, their operations are complicated, and their detection limits are high, so they cannot be obtained well. Applications

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Example 1Preparation method and application of CdS sensitized TiO2 environmental estrogen photoelectrochemical sensor

[0041] (1) Clean the conductive glass with acetone, ethanol and ultrapure water in sequence, and dry it with nitrogen; take 6 μL, 2 mg / mL rhodamine B functionalized TiO 2 The solution was added dropwise to the conductive surface of the conductive glass, dried at room temperature, calcined at 400°C for 30min, and cooled to obtain rhodamine B-TiO 2 Modified glass electrodes;

[0042] (2) In Rhodamine B-TiO 2 Add 4 μL, 0.1 μg / mL environmental estrogen standard solution dropwise to the surface of the modified glass electrode, rinse the surface of the electrode with ultrapure water, and dry it in a refrigerator at 4 °C;

[0043] (3) Continue to drop 4 μL of BSA solution with a mass fraction of 1% to seal the non-specific active sites on the electrode surface, rinse the electrode surface with ultrapure water, and dry it in a refrigerator at 4°C;

[0044...

Embodiment 2

[0046] Example 2 Preparation method and application of CdS sensitized TiO2 environmental estrogen photoelectrochemical sensor

[0047] (1) Clean the conductive glass with acetone, ethanol and ultrapure water in sequence, and dry it with nitrogen; take 6 μL, 3 mg / mL rhodamine B functionalized TiO 2 The solution was added dropwise to the conductive surface of the conductive glass, dried at room temperature, calcined at 450°C for 45min, and cooled to obtain rhodamine B-TiO 2 Modified glass electrodes;

[0048] (2) In Rhodamine B-TiO 2 Add 4 μL, 0.5 μg / mL environmental estrogen standard solution dropwise to the surface of the modified glass electrode, rinse the surface of the electrode with ultrapure water, and dry it in a refrigerator at 4 °C;

[0049] (3) Continue to drop 4 μL of BSA solution with a mass fraction of 2% to seal the non-specific active sites on the electrode surface, rinse the electrode surface with ultrapure water, and dry it in a refrigerator at 4°C;

[005...

Embodiment 3

[0052] Example 3 Preparation method and application of CdS sensitized TiO2 environmental estrogen photoelectrochemical sensor

[0053] (1) Clean the conductive glass with acetone, ethanol and ultrapure water in sequence, and dry it with nitrogen; take 6 μL, 4 mg / mL rhodamine B functionalized TiO 2 The solution was added dropwise to the conductive surface of the conductive glass, dried at room temperature, calcined at 500°C for 60min, and cooled to obtain rhodamine B-TiO 2 Modified glass electrodes;

[0054] (2) In Rhodamine B-TiO 2 Add 4 μL, 1 μg / mL environmental estrogen standard solution dropwise to the surface of the modified glass electrode, rinse the electrode surface with ultrapure water, and dry it in a refrigerator at 4 °C;

[0055] (3) Continue to drop 4 μL of BSA solution with a mass fraction of 3% to seal the non-specific active sites on the electrode surface, rinse the electrode surface with ultrapure water, and dry it in a refrigerator at 4°C;

[0056] (4) Co...

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Abstract

The invention relates to a preparation method and application of a CdS-sensitized TiO2 environmental estrogen photoelectrochemical sensor. The method utilizes TiO2 as an antigen-capturing base material, adopts the method of directly dropping Na2S, and modifies the Cd2+ functionalized TiP nanomaterial as a marker The CdS photoelectric active material is generated in situ on the surface of the electrode, and the CdS is converted into a photocurrent signal by irradiating the CdS with an LED lamp with a visible light wavelength. The base material TiO2 has a good energy band match with CdS, which can further improve the photoelectric conversion signal of CdS, so as to prepare ultra-sensitive detection of estradiol, estriol, diethylstilbestrol, bisphenol A, nonylphenol, estrone and other environments Competitive photoelectrochemical immunosensors for pollutants.

Description

Technical field [0001] The present invention involves a CDS sensitization TIO 2 Environmental estrogen photoelectric chemical sensor preparation method and application, which involves a CDS sensitivity TIO in situ 2 The preparation method and application of competitive environmental estrogen photoelectric student material sensors belongs to the field of new functional materials and environmental pollutants biosensor detection technology. Background technique [0002] With the rapid development of modern workers and agriculture, a large number of environmental harmful substances enter the human living environment with human production activities, which will be greatly harmful to human health.Environmental estrogen refers to chemicals with estrogen activity similar to biological estrogen in the environment. After entering the human body, it can produce environmental toxins that simulate estrogen.The amount of trace estrogen in the environment enters the human body through the food ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/26G01N27/30
Inventor 杜斌黎荣霞闫涛魏琴朱宝存吴丹
Owner UNIV OF JINAN
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