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Attapulgite/nitrogen-doped graphene modified glassy carbon electrode as well as preparation method and application thereof

A nitrogen-doped graphene and glassy carbon electrode technology, applied in the field of electrochemical analysis and detection, can solve the problems of high price, complicated preparation process, harmful to human body, etc., and achieve the effects of low cost, good electrical activity, and easy operation and control.

Inactive Publication Date: 2018-12-11
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the preparation process of poly-3,4-ethylenedioxythiophene / nitrogen-doped graphene-modified glassy carbon electrode is complicated, and the monomer of 3,4-ethylenedioxythiophene is expensive, and the acetonitrile solution used in the polymerization process will harm the human body. harmful

Method used

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  • Attapulgite/nitrogen-doped graphene modified glassy carbon electrode as well as preparation method and application thereof
  • Attapulgite/nitrogen-doped graphene modified glassy carbon electrode as well as preparation method and application thereof
  • Attapulgite/nitrogen-doped graphene modified glassy carbon electrode as well as preparation method and application thereof

Examples

Experimental program
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Embodiment 1

[0033] (1) Preparation of attapulgite / nitrogen-doped graphene (Pal / NGE) modified glassy carbon electrode: Weigh 10 g of attapulgite (3000 mesh) into a beaker containing 100 ml of 2M hydrochloric acid, stir magnetically at room temperature for 60 h and then filter. After washing several times with distilled water, it was freeze-dried; graphite powder was used as raw material to prepare graphene oxide by improved Hummers method. Prepare 150ml of 0.5mg / ml GO solution, adjust the pH to 9.43 with dilute ammonia, and add 5.0g of uric acid under stirring. The obtained solution was transferred to a single-necked flask and heated to 95° C. in a water bath, and refluxed at a constant temperature for 30 h. After cooling, filter, wash with ethanol and distilled water several times, and freeze-dry to obtain nitrogen-doped graphene powder. Weigh 10 mg of attapulgite obtained above and mix with 2.5 mg of nitrogen-doped graphene, dissolve in N,N-dimethylformamide and ultrasonically disperse ...

Embodiment 2

[0044] This embodiment is basically the same as Example 1, the only difference is that the acid-modified attapulgite of 5 mg is mixed with 2.5 mg of nitrogen-doped graphene, that is, the mass ratio of the acid-modified attapulgite to nitrogen-doped graphene is 2:1.

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Abstract

The invention discloses an attapulgite / nitrogen-doped graphene modified glassy carbon electrode, a preparation method of the glassy carbon electrode, and application of the glassy carbon electrode, insynchronous detection of catechol and hydroquinone. The method comprises the following steps: mixing acid-modified attapulgite and nitrogen-doped graphene according to a mass ratio of (2-4):1, and ultrasonically dispersing in N,N-dimethylformamide; dispensing the dispersion on a glassy carbon electrode, and preparing a Pal / NGE modified glassy carbon electrode constructed by the composite film andglassy carbon electrode. The attapulgite / nitrogen-doped graphene modified glassy carbon electrode disclosed by the invention is simple in preparation, green, economic and low in cost. The attapulgite / nitrogen-doped graphene modified glassy carbon electrode can be applied to synchronous detection of catechol and hydroquinone and is excellent in reproducibility, high in stability and short in response time, and the lowest detection limit of the catechol and hydroquinone is respectively 0.13umol / L and 0.8 umol / L.

Description

technical field [0001] The invention belongs to the technical field of electrochemical analysis and detection, and in particular relates to an attapulgite / nitrogen-doped graphene (Pal / NGE) modified glassy carbon electrode, a preparation method and an application in synchronous detection of catechol and hydroquinone. Background technique [0002] Attapulgite (Pal), also called palygorskite, is a natural nanofibrous crystalline hydrated magnesium aluminum silicate with a porous structure and a large specific surface area. It has channels similar to zeolite and has strong adsorption capacity. There are a large number of active hydroxyl groups on the surface of the attapulgite, which makes it easy to carry out the grafting reaction on the surface, and can also be used as a catalytic active site in the field of catalysis. At present, the application of attapulgite and modified attapulgite is mainly used as a carrier for adsorbents to adsorb reactive dyes, heavy metal ions and dru...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/30G01N27/48
CPCG01N27/308G01N27/48
Inventor 雷武吴玉婷郝青丽王风云夏明珠
Owner NANJING UNIV OF SCI & TECH
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