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Electrochemical sensor for determining 2,4,6-trichlorophenol as well as preparation and application of electrochemical sensor

A trichlorophenol, electrochemical technology, applied in the direction of material electrochemical variables, scientific instruments, instruments, etc., to achieve the effect of improving anti-interference ability, low cost, strong specific recognition ability

Active Publication Date: 2018-11-02
JIANGSU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are few reports on the preparation of electrochemical sensors for detecting 2,4,6-TCP content based on molecular imprinting technology

Method used

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  • Electrochemical sensor for determining 2,4,6-trichlorophenol as well as preparation and application of electrochemical sensor
  • Electrochemical sensor for determining 2,4,6-trichlorophenol as well as preparation and application of electrochemical sensor
  • Electrochemical sensor for determining 2,4,6-trichlorophenol as well as preparation and application of electrochemical sensor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Preparation of the sensor:

[0022] Take a total of 5 μL (volume ratio of 3:1) of a mixed solution of carbon quantum dot solution with a volume concentration of 4% dispersed in distilled water and a mass concentration of 1% chitosan acetic acid solution, and drop-coat it on the surface of the polished bare glassy carbon electrode. Tumble dry under infrared lamps. After placing it in a mixed solution of 1mM 2,4,6-TCP ethanol-water solution and 1mM o-phenylenediamine ethanol-water solution (the molar ratio is 1:1), the pH of the solution was adjusted to 5 with 0.05M phosphate buffer solution. In the range of 1.0V, the cyclic voltammetry was scanned for 20 cycles at a scan rate of 50mV / s, and the electrochemical polymerization was formed into a film. After the polymeric film was naturally dried at room temperature, the electrode prepared above was scanned by cyclic voltammetry in a 1% (m / V) NaOH solution for 6 laps at the same scan rate in the potential range of 0-1.5V, a...

Embodiment 2

[0024] Preparation of the sensor:

[0025] Take a total of 9 μL of a mixed solution of a carbon quantum dot solution with a volume concentration of 4% dispersed in distilled water and a mass concentration of 1% chitosan acetic acid solution (volume ratio is 3:1), and drop-coat it on the surface of the polished bare glassy carbon electrode. Tumble dry under infrared lamps. After placing it in a mixed solution of 1mM 2,4,6-TCP ethanol-water solution and 6mM o-phenylenediamine ethanol-water solution (molar ratio 1:6), adjust the pH of the solution to 7 with 0.05M phosphate buffer, and adjust the pH of the solution to 7 at 0- In the range of 1.0V, the cyclic voltammetry was scanned for 20 cycles at a scan rate of 50mV / s, and the electrochemical polymerization was formed into a film. After the polymeric film was naturally dried at room temperature, the electrode prepared above was scanned by cyclic voltammetry in a 1% (m / V) NaOH solution for 6 laps at the same scan rate within the...

Embodiment 3

[0027] Preparation of the sensor:

[0028] Take a total of 9 μL of a mixed solution of a carbon quantum dot solution with a volume concentration of 4% dispersed in distilled water and a mass concentration of 1% chitosan acetic acid solution (volume ratio is 3:1), and drop-coat it on the surface of the polished bare glassy carbon electrode. Tumble dry under infrared lamps. After placing it in a mixed solution of 1mM 2,4,6-TCP ethanol solution and 6mM pyrrole ethanol solution (the molar ratio is 1:6), adjust the pH of the solution to 7 with 0.05M phosphate buffer solution, within the range of 0-1.0V, Electrochemical polymerization was performed under the conditions of 20 cycles of cyclic voltammetry scanning at a scan rate of 50 mV / s. After the polymeric membrane is naturally dried at room temperature, the template molecules are eluted with the same scan rate of 1% (m / V) NaOH solution as the eluent within the potential range of 0-1.5V for the electrode prepared above. After dr...

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Abstract

The invention belongs to the field of molecular imprinting detection, particularly relates to an electrochemical sensor for determining 2,4,6-trichlorophenol on the basis of the molecular imprinting technique as well as preparation and application of the electrochemical sensor, and aims to solve the problem that in the conventional electrochemical analysis technique for 2,4,6-trichlorophenol, specific recognition of the target object is poor because 2,4,6-trichlorophenol has similar oxidation potential with an analogue of 2,4,6-trichlorophenol. The prepared electrochemical sensor is based on the molecular imprinting technique and can be used for specifically recognizing 2,4,6-trichlorophenol. A carbon quantum dot-polymer composite film is adopted as an electrode modification material and is cheap and environmentally friendly; the sensor is simple to prepare, reaction conditions are mild, the process is easy to control, and the sensor has higher sensitivity for template molecules and has higher anti-interference performance and can be used for quantitative analysis of 2,4,6-trichlorophenol.

Description

technical field [0001] The invention belongs to the field of molecular imprinting detection, and in particular relates to an electrochemical sensor for measuring 2,4,6-trichlorophenol based on molecular imprinting technology and its preparation and application. Background technique [0002] With the development of the global economy and the modernization of industry and agriculture, the types and quantities of pollutants discharged into the environment are increasing day by day, which will greatly affect and endanger human health and the entire ecological environment. Among all kinds of environmental pollutants, persistent organic pollutants represented by chlorophenols are typical toxic and harmful substances in the environment, which have three effects of "teratogenic, carcinogenic and mutagenic". The use of a large amount of chlorophenols has caused the pollution of the ecological environment. At the same time, chlorophenols have adverse effects on human health through v...

Claims

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Application Information

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IPC IPC(8): G01N27/30
CPCG01N27/308
Inventor 吴海燕郑伟刘维桥唐江宏关明云高永邱凤仙
Owner JIANGSU UNIV OF TECH
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