Porous carbon modified glassy carbon electrode and electrochemical method for detecting three target objects

A glassy carbon electrode and porous carbon technology, which is applied in the field of electrochemical detection, can solve the problems of low sensitivity of trace detection, and achieve the effects of avoiding smaller contact area, high oxidation peak current value, and good conductivity

Pending Publication Date: 2020-10-30
南宁师范大学
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention aims at the low detection sensitivity of catechol (CC), hydroquinone (HQ) and resorcinol (RC) at the same time, and provides a porous carbon modified glassy carbon electrode

Method used

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  • Porous carbon modified glassy carbon electrode and electrochemical method for detecting three target objects
  • Porous carbon modified glassy carbon electrode and electrochemical method for detecting three target objects
  • Porous carbon modified glassy carbon electrode and electrochemical method for detecting three target objects

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Embodiment 1

[0035] A porous carbon modified glassy carbon electrode obtained by the following steps:

[0036] Step 1. Weigh 5g of sodium alginate and put it into a quartz boat and place it in a tube furnace. Under the protection of nitrogen, from room temperature, at a heating rate of 3°C / min, raise the temperature to 900°C for 1h, then cool to room temperature, and use 50 Soak and stir the pyrolyzed carbon material with ±5mL 3.0mol / L hydrochloric acid for 30min, wash repeatedly with distilled water until neutral, and dry at 100°C for 12h to obtain porous carbon;

[0037] Step 2. Disperse 10 mg of the porous carbon prepared in step 1 in 10 mL of N,N-dimethylformamide, disperse evenly by ultrasonic, and then dilute it by one time to obtain a 0.5 mg / mL porous carbon dispersion;

[0038] Step three, the glassy carbon electrode with Al 2 o 3 Polish until the mirror surface is smooth, then ultrasonically clean with ethanol and double-distilled water in turn, finally, rinse with double-distil...

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Abstract

The invention discloses a porous carbon modified glassy carbon electrode, which is prepared by the steps of pyrolyzing sodium alginate under the protection of nitrogen, cooling a carbon material obtained by pyrolysis to room temperature, adding the carbon material into hydrochloric acid with the concentration of 1-5mol / L, soaking and stirring for 20-60 minutes, washing with distilled water to be neutral, and drying to obtain porous carbon; dispersing porous carbon into N,N-dimethylformamide, and carrying out uniform ultrasonic dispersion to obtain a porous carbon dispersion liquid; and polishing a glassy carbon electrode with Al2O3 until the mirror surface is smooth, then sequentially carrying out ultrasonic cleaning with ethanol and secondary distilled water, washing with the secondary distilled water, blow-drying, dropwise adding the porous carbon dispersion liquid, and drying to obtain the porous carbon modified glassy carbon electrode. A three-electrode system composed of the porous carbon modified glassy carbon electrode can distinguish oxidation peaks of catechol, hydroquinone and resorcinol, significantly enhances electrochemical signals of three target objects, improves thedetection sensitivity, and can be used for determination of actual environmental water samples.

Description

technical field [0001] The invention relates to the technical field of electrochemical detection. More specifically, the present invention relates to a porous carbon-modified glassy carbon electrode and an electrochemical method capable of simultaneously detecting three dihydroxybenzene isomers. Background technique [0002] Catechol (CC), resorcinol (RC), and hydroquinone (HQ) are three isomers of dihydroxybenzene, which are widely used in different fields such as pesticides, dyes, flavorings, cosmetics, and pharmaceuticals , is easy to enter the ecological environment during production and application, and is an important environmental pollutant in the ecosystem. Even if the concentration is very low, it will cause great harm to human health and ecology. Their structures and properties are similar, and they usually coexist in the environment, which makes them interfere with each other during detection. Therefore, it is of great practical significance to establish an accu...

Claims

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Application Information

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IPC IPC(8): G01N27/30G01N27/48
CPCG01N27/308G01N27/48
Inventor 韦良黄信龙杨晶杨显德张纤千
Owner 南宁师范大学
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