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Ionic liquid functional carbon nitride nanosheet modified electrode as well as preparation and application of electrode in chlorphenol detection

A technology of ionic liquid and modified electrode, which is applied in the field of electroanalytical chemistry, can solve problems such as hindering application and poor conductivity, and achieve the effects of wide detection range, low preparation cost and mild conditions

Active Publication Date: 2017-02-22
江苏乐士源新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

On the other hand, since C 3 N 4 Nanosheet itself is a semiconductor, and its conductivity is too poor, which largely hinders its application in the field of electrochemistry

Method used

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  • Ionic liquid functional carbon nitride nanosheet modified electrode as well as preparation and application of electrode in chlorphenol detection
  • Ionic liquid functional carbon nitride nanosheet modified electrode as well as preparation and application of electrode in chlorphenol detection
  • Ionic liquid functional carbon nitride nanosheet modified electrode as well as preparation and application of electrode in chlorphenol detection

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (a)C 3 N 4 Preparation of nanosheets

[0030] A certain amount of melamine was calcined at 550°C for 4 hours under a nitrogen atmosphere to obtain carbon nitride. Weighed 1 g of carbon nitride and dissolved it in 20 mL of concentrated sulfuric acid, stirred at room temperature for 2 hours, added 200 mL of deionized water to dilute, and ultrasonically dispersed the diluted solution for 8 hours. The supernatant solution after ultrasonication was centrifuged at 3800rpm, and the resulting bottom precipitate was C 3 N 4 Nanosheets;

[0031] (b)IL-C 3 N 4 preparation of

[0032] Weigh the C obtained in 0.6g (a) 3 N 4 Add it to a mixture of 50mL absolute ethanol and 8mL n-bromobutane, heat and stir in a constant temperature water bath at 50°C for 48h after ultrasonication, centrifuge the resulting solution at 12000rpm for 15min, take the bottom precipitate and wash it three times with deionized water and absolute ethanol respectively , after drying and grinding, the l...

Embodiment 2

[0036] (a)C 3 N 4 Preparation of nanosheets

[0037] Prepared according to the method and conditions in step (a) in Example 1;

[0038] (b)IL-C 3 N 4 preparation of

[0039] Weigh the C obtained in 0.8g (a) 3 N 4 Add it to a mixture of 50mL absolute ethanol and 8mL n-bromobutane, heat and stir in a constant temperature water bath at 60°C for 36h after ultrasonication, centrifuge the resulting solution at 12000rpm for 15min, take the bottom precipitate and wash it three times with deionized water and absolute ethanol respectively , after drying and grinding, the liquid functionalized carbon nitride nanosheets were obtained: IL-C 3 N 4 ;

[0040] (c)IL-C 3 N 4 Preparation of modified electrodes

[0041] Polish the glassy carbon electrode into a mirror surface, ultrasonically clean it with dilute nitric acid, absolute ethanol, and high-purity water for 1 min, and dry it naturally at room temperature for later use; weigh the IL-C obtained in step (b). 3 N 4 Uniformly...

Embodiment 3

[0043] (a)C 3 N 4 Preparation of nanosheets

[0044] Prepared according to the method and conditions in step (a) in Example 1;

[0045] (b)IL-C 3 N 4 preparation of

[0046] Weigh the C obtained in 0.5g (a) 3 N 4 Add it to a mixture of 50mL absolute ethanol and 8mL n-bromobutane, heat and stir in a constant temperature water bath at 70°C for 48h after ultrasonication, centrifuge the resulting solution at 12000rpm for 15min, take the bottom precipitate and wash it three times with deionized water and absolute ethanol respectively , after drying and grinding, the liquid functionalized carbon nitride nanosheets were obtained: IL-C 3 N 4 ;

[0047] (c)IL-C 3 N 4 Preparation of modified electrodes

[0048] Polish the glassy carbon electrode into a mirror surface, ultrasonically clean it with dilute nitric acid, absolute ethanol, and high-purity water for 1 min, and dry it naturally at room temperature for later use; weigh the IL-C obtained in step (b). 3 N 4 Uniformly...

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Abstract

The invention discloses an ionic liquid functional C3N4 modified electrode as well as a preparation method and application of the electrode in chlorphenol detection. C3N4 is protonated in acid to prepare a C3N4 nanosheet, and then quaternization is realized with n-butyl bromide in an alkaline condition to prepare an ionic liquid functional C3N4 nanosheet; the catalytic active sites of the obtained ionic liquid functional C3N4 nanosheet are increased while the dispersity, electrical conductivity and electrochemical catalytic performance are obviously improved; and the ionic liquid functional C3N4 nanosheet is dropwise applied to the electrode surface to obtain an ionic liquid functional C3N4 nanosheet modified electrode and is applied to efficient and sensitive detection of 2,4-dichlorophenol in a water medium. According to the invention, the obtained modified electrode imposes low detection limit on 2,4-dichlorophenol and has relatively high selectivity, stability and anti-interference performance and relatively wide linear range; and a quick and sensitive electrochemical method is provided for quantitative detection of 2,4-dichlorophenol.

Description

[0001] Technical field: [0002] The invention belongs to the technical field of electroanalytical chemistry, and in particular relates to an ionic liquid functionalized carbon nitride nanosheet modified electrode, a preparation method thereof and an application for quantitative detection of chlorophenols. [0003] Background technique: [0004] Chlorophenol compounds can be used as intermediates in pharmaceutical synthesis, main components of agricultural pesticides and herbicides, and wood preservatives and fungicides. Therefore, a large number of residues are caused in the environment through industrial production and agricultural use, especially the pollution in the water environment is the most serious. The content of chlorophenols in water is very low, but the P electrons in the chlorine atom and the π electrons on the benzene ring can form a stable conjugate system. Most of the chlorophenols are highly toxic and can accumulate in the biosphere through the food chain. It...

Claims

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Application Information

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IPC IPC(8): G01N27/30
CPCG01N27/30
Inventor 詹天荣宋洋田夏
Owner 江苏乐士源新能源科技有限公司
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