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Method for detecting o-chlorophenol based on PEDOT/g-C3N4 electrode

A technology of o-chlorophenol and g-c3n4, applied in the field of electrochemical detection, can solve the problems of cumbersome operation and high cost, and achieve good reproducibility and good anti-interference effect

Inactive Publication Date: 2016-10-26
NANJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional methods for detecting o-chlorophenol include spectrometry and chromatography, but the operation is cumbersome and the cost is high, so the electrochemical method with simple operation, low cost and high sensitivity has attracted widespread attention.

Method used

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  • Method for detecting o-chlorophenol based on PEDOT/g-C3N4 electrode
  • Method for detecting o-chlorophenol based on PEDOT/g-C3N4 electrode
  • Method for detecting o-chlorophenol based on PEDOT/g-C3N4 electrode

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) g-C 3 N 4 Electrode preparation:

[0026] The glassy carbon electrode (GCE) was sequentially filled with 0.3 and 0.05 μm α-A1 2 o 3 Polish to a mirror surface, then use absolute ethanol and double-distilled water to sonicate for 5 minutes, and finally rinse with double-distilled water and dry at room temperature; take 5 μL of g-C with a concentration of 500 μg / mL 3 N 4 After the aqueous solution was ultrasonically cleaned, it was dropped onto the surface of the GCE and dried at room temperature.

[0027] (2) PEDOT / g-C 3 N 4 Electrode preparation:

[0028] Construct a three-electrode system, that is, g-C 3 N 4The modified electrode was used as the working electrode, the saturated calomel electrode was used as the reference electrode, and the Pt wire electrode was used as the counter electrode, with 10 mL of pure aqueous solution of 0.0142 g EDOT monomer and 0.208 g PSS as the electrolyte (0.01 mol L -1 EDOT and 0.1mol L -1 PSS), deposited on GCE at a const...

Embodiment 2

[0030] The glassy carbon electrode (GCE) was sequentially filled with 0.3 and 0.05 μm α-A1 2 o 3 Polish until it becomes a mirror surface, then use absolute ethanol and double distilled water to sonicate for 5 minutes, and finally rinse with double distilled water and dry at room temperature; build a three-electrode system, that is, use a glassy carbon electrode as a working electrode and a saturated calomel electrode Used as a reference electrode and a Pt wire electrode as a counter electrode, with 0.01mol L -1 EDOT monomer and 0.1mol L -1 10mL of pure aqueous solution of PSS was used as the electrolyte, which was deposited on the GCE at a constant potential of 0.8V and a scan time of 400s to obtain a PEDOT electrode.

Embodiment 3

[0032] Using cyclic voltammetry (CV) for glassy carbon electrode, PEDOT electrode, PEDOT / g-C 3 N 4 Electrode performance testing; the electrolyte is a mixed solution of ABS buffer solution with pH=4.5 and o-chlorophenol, the control potential scanning range is 0.6-1.0V, and the scanning speed is 0.1V / s. Cyclic voltammetry (CV) characterization results are attached figure 1 shown.

[0033] Compared with the glassy carbon electrode, the peak current of o-chlorophenol on the PEDOT electrode is significantly enhanced because of the excellent conductivity of PEDOT. Compared with PEDOT electrode, PEDOT / g-C 3 N 4 The electrode exhibited higher sensitivity to o-chlorophenol due to the g-C 3 N 4 It can effectively increase the specific surface area of ​​the electrode, and is conducive to the adsorption of o-chlorophenol on the electrode.

[0034] Using cyclic voltammetry (CV) for glassy carbon electrode, PEDOT electrode, PEDOT / g-C 3 N 4 Electrode performance test; the electrol...

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Abstract

The invention discloses a method for detecting o-chlorophenol based on a PEDOT / g-C3N4 electrode. The method comprises the following steps: (1) preparing a standard solution; (2) establishing a standard curve of o-chlorophenol concentrations for detection; (3) detecting the concentration of o-chlorophenol of a sample to be detected. The linear detection range of o-chlorophenol of provided method is in a range of 0.5 to 40 mmol / L. The linear equation of peak current Ipa and o-chlorophenol concentration (c) is Ipa([mu]A)=3.15282+0.57007c(mmol / L) (R2=0.994), and the detection limit is 0.42 mmol / L. At the same time, the provided detection method has a good performance on resisting interference, and has an application prospect on the detection of actual water sample.

Description

technical field [0001] The invention relates to an electrochemical detection method, in particular to a method based on PEDOT / g-C 3 N 4 Electrode detection method for o-chlorophenol. Background technique [0002] Chlorophenol compounds are important chemical raw materials in industry, widely used in the synthesis of pesticides and medicines, the preparation of dyes and the processing and manufacturing of plastics, herbicides, insecticides, fungicides, etc. Chlorophenols are widely used in industry and produced in large quantities. Chlorophenols can be detected in urban domestic wastewater and industrial waste, among which chlorophenols are contained in the waste of chemical plants producing monochlorophenol and dichlorophenol The concentration of the compound is higher. Because chlorophenols are the final products or by-products in their chemical synthesis, industrial wastewater is the main pollution source of chlorophenols. Most chlorophenol compounds are highly toxic, ...

Claims

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Application Information

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IPC IPC(8): G01N27/48G01N27/30
CPCG01N27/308G01N27/48
Inventor 杨小弟李彩红赵建军朱俊毕文韬
Owner NANJING NORMAL UNIVERSITY
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