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Photoelectric sensor and application thereof, and preparation method of working electrode

A photoelectric sensor and working electrode technology, applied in the field of photoelectric sensing, can solve the problems of low sensitivity, high toxicity of reagents, complicated methods, etc., and achieve the effects of simple detection process, low cost, and improved generation ratio.

Active Publication Date: 2016-02-24
ANHUI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, each method has disadvantages, such as expensive equipment, complicated method, time-consuming, low sensitivity, and high toxicity of reagents.

Method used

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  • Photoelectric sensor and application thereof, and preparation method of working electrode
  • Photoelectric sensor and application thereof, and preparation method of working electrode

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Experimental program
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Embodiment 1

[0057] Such as figure 1 as shown, figure 1 It is a schematic flowchart of a method for preparing a working electrode of a photoelectric sensor proposed by the present invention.

[0058] refer to figure 1 , the preparation method of the working electrode of a kind of photoelectric sensor that the present invention proposes, comprises the steps:

[0059] S1. After cleaning the ITO electrode with acetone, add it to the first mixed solution for cleaning. In the first mixed solution, the concentration of sodium hydroxide is 0.8mol / L, and the volume ratio of ethanol and water is 3:2; then wash it with water Finally, the ITO electrode was cleaned for 18 minutes, and dried at 75°C for 13 hours to obtain electrode A;

[0060] S2. Add the titanium dioxide colloidal solution dropwise on the surface of electrode A, wherein the preparation method of the titanium dioxide colloidal solution is to ultrasonically disperse 8 mg of titanium dioxide powder in 6 mL of deionized water, every 1 ...

Embodiment 2

[0066] The preparation method of the working electrode of a kind of photoelectric sensor that the present invention proposes, comprises the steps:

[0067] S1. After cleaning the ITO electrode with acetone, add it to the first mixed solution for cleaning. In the first mixed solution, the concentration of sodium hydroxide is 1.2mol / L, and the volume ratio of ethanol and water is 2:3; then wash it with water Finally, the ITO electrode was cleaned for 12 minutes, and dried at 85°C for 10 hours to obtain electrode A;

[0068] S2. Add the titanium dioxide colloidal solution dropwise on the surface of electrode A, wherein the preparation method of the titanium dioxide colloidal solution is to ultrasonically disperse 10 mg of titanium dioxide powder in 6 mL of deionized water, every 1 cm 2 Add 0.06mL of titanium dioxide colloidal solution dropwise on the modified surface of electrode A, dry and then calcinate at 460°C for 0.5h, then cool to room temperature to obtain electrode B;

...

Embodiment 3

[0074] The preparation method of the working electrode of a kind of photoelectric sensor that the present invention proposes, comprises the steps:

[0075] S1. Clean the ITO electrode with acetone, and then add it to the first mixed solution for cleaning. In the first mixed solution, the concentration of sodium hydroxide is 1mol / L, and the volume ratio of ethanol and water is 1:1; then wash it with water , the cleaning time of the ITO electrode is 15 minutes, and the electrode A is obtained by drying at 80°C for 12 hours;

[0076] S2, drop the titanium dioxide colloidal solution on the surface of electrode A, wherein the preparation method of the titanium dioxide colloidal solution is to ultrasonically disperse 6 mg of titanium dioxide powder in 6 mL of deionized water, every 1 cm 2 Add 0.08mL of titanium dioxide colloidal solution dropwise to the modified surface of electrode A, dry and then calcinate at 450°C for 0.5h, then cool to room temperature to obtain electrode B;

...

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Abstract

The invention discloses a preparation method of a working electrode of a photoelectric sensor. The preparation method includes the following steps: cleaning an ITO electrode, and then drying to obtain an electrode A; dropwise adding a titanium dioxide colloidal solution on the surface of the electrode A, drying, then calcining, and cooling to obtain an electrode B; placing the electrode B in a poly(diallyldimethylammonium chloride) aqueous solution, soaking, cleaning, next placing in a carboxylated quantum dot colloidal solution, soaking, and cleaning to obtain an electrode C; fixing a probe DNA on the electrode C to obtain an electrode D; dropwise adding a gold nanoparticle-labelled target DNA onto the electrode D, and making the gold nanoparticle-labelled target DNA hybridized with the probe DNA, to obtain an electrode E; and activating the electrode E, fixing an organic dye sensitizing agent on the surface of the electrode E, and cleaning to obtain the working electrode of the photoelectric sensor. The invention also discloses the photoelectric sensor. The photoelectric sensor has the characteristics of high sensitivity, good specificity, simple and convenient detection method, and economic cost.

Description

technical field [0001] The invention relates to the technical field of photoelectric sensing, in particular to a method for preparing a working electrode of a photoelectric sensor, a photoelectric sensor composed of the working electrode and applications of the photoelectric sensor. Background technique [0002] Mercury ions are one of the common pollutants, which can be transformed into highly toxic methylmercury through the action of microorganisms, and enter the human body through the food chain, causing mercury poisoning incidents. Current methods for detecting mercury ions include, for example, atomic spectroscopy, molecular spectroscopy, ion chromatography, and electrochemical methods. However, each method has disadvantages, such as expensive equipment, complicated method, time-consuming, low sensitivity, and high toxicity of reagents. Therefore, it is especially necessary to invent new analytical methods to overcome the above-mentioned shortcomings. [0003] Photoel...

Claims

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Application Information

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IPC IPC(8): G01N27/26
CPCG01N27/26
Inventor 石建军赵明李文何杰杨萍
Owner ANHUI UNIV OF SCI & TECH
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