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Preparation of electrochemical sensor with real-time visual colorimetric display

An electrochemical and sensor technology, applied in the field of electrochemical detection, can solve the problems of complex operations and expensive instruments, and achieve the effects of improving sensitivity, simple and convenient operation, and reducing background signals.

Inactive Publication Date: 2019-07-30
UNIV OF JINAN
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Problems solved by technology

Therefore, in recent years, various analytical methods such as electrochemiluminescence, fluorescence measurement, liquid chromatography, and radioimmunoassay have been proposed, but they have disadvantages such as expensive instruments and complicated operations.

Method used

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  • Preparation of electrochemical sensor with real-time visual colorimetric display

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Embodiment 1

[0023] Example 1: Construction of an electrochemical sensor with a colorimetric display for instant visualization

[0024] (1) Cut the FTO conductive glass into a size of 1 cm×cm, put it in acetone, absolute ethanol, and ultrapure water for 10 minutes, and then put it in an oven at 60 °C for 30 minutes to dry.

[0025] (2) First, 0.3638 g bismuth nitrate (Bi(NO) 3 ) and 6.6404 g of potassium iodide (KI) were dissolved in 100 mL of secondary water, and the pH of the solution was adjusted to 1.2 with concentrated hydrochloric acid, then 45 mL of ethanol solution containing 1.4592 g of p-benzoquinone was added, stirred for 30 min to fully dissolve and mix, and then ( 1) Insert the FTO conductive glass treated in the above mixed solution into the mixed solution, firstly deposit it at -0.3 V voltage for 10 s by constant potential deposition method, then deposit it at -0.1 V voltage for 600 s, take it out and dry it at room temperature, and continue to deposit The conductive glass ...

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Abstract

The invention discloses a preparation of an electrochemical sensor with real-time visual colorimetric display, and relates to the technical field of the electrochemical detection. The preparation method comprises the following steps: preparing nickel through a potential deposition method; taking ferric oxyhydroxide / bismuth vanadate nanometer composite material as photoanode, taking electrically-polymerized Prussian blue as photocathode and preparing a laccase catalyst as the biological cathode, and connecting with a portable digital multimeter and a capacitor by utilizing an external coil. Under the specific binding effect of the antigen-antibody, the glucose is promoted to produce hydrogen peroxide under the catalysis of the glucose oxidase, thereby accelerating the nickel under the illumination; in the process of producing the ferric oxyhydroxide / bismuth vanadate photoelectron, the produced instantaneous current can be read through the digital multimeter, and the Prussian blue receiving electron is changed as the Prussian white and can be used as the synchronous colorimetric display. After the reaction is finished, the Prussian white connects with the laccase to recover an initial state and change as the Prussian blue; the circulation of the photocathode material provides great convenience for the construction of the sensor.

Description

technical field [0001] The invention relates to the technical field of electrochemical detection, in particular to a preparation method of an electrochemical sensor with instant visual colorimetric display. Background technique [0002] As we all know, cancer cells are a kind of mutated cells, which are the source of cancer. They have three characteristics: infinite proliferation, transformation and easy transfer, and can infinitely proliferate and destroy normal cell tissues. According to the World Health Organization survey in 2018, nearly one-sixth of global deaths are caused by cancer, and the incidence and mortality of cancer are expected to continue to rise in the next 20 years. Tumor markers are considered to be effective indicators in clinical testing to determine the presence or absence of disease or to monitor disease progression. Therefore, various analysis methods such as electrochemiluminescence, fluorescence measurement, liquid chromatography, and radioimmunoa...

Claims

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Application Information

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IPC IPC(8): G01N21/78G01N27/26
CPCG01N21/78G01N27/26
Inventor 于京华孙建丽李丽
Owner UNIV OF JINAN
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