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Copper phthalocyanine conjugated graphite carbon nitride nano composite material, modified electrode and preparation method thereof

A nanocomposite material, graphite carbon nitride technology, applied in nitrogen compounds, electrochemical variables of materials, chemical instruments and methods, etc., can solve problems such as poor conductivity, limited application of electrochemical sensors, and high sample requirements

Active Publication Date: 2020-10-23
NANJING MEDICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the disadvantages of the prior art are: (1) g-C 3 N 4 The poor conductivity limits its application in electrochemical sensors; (2) the instruments required by the prior art are expensive and have high requirements for samples; (3) the operation is complex, the detection procedures are cumbersome and time-consuming

Method used

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  • Copper phthalocyanine conjugated graphite carbon nitride nano composite material, modified electrode and preparation method thereof
  • Copper phthalocyanine conjugated graphite carbon nitride nano composite material, modified electrode and preparation method thereof
  • Copper phthalocyanine conjugated graphite carbon nitride nano composite material, modified electrode and preparation method thereof

Examples

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Embodiment 1

[0056] This example is for the preparation of copper phthalocyanine conjugated graphite carbon nitride nanocomposite material.

[0057] The basic preparation process of this embodiment includes:

[0058] The first step is to prepare yellow graphite carbon nitride solid by heating melamine, denoted as g-C 3 N 4 Disperse the graphite carbon nitride solid in concentrated sulfuric acid, and ultrasonically treat it. When the color of the dispersion changes from yellow to milky white, graphite carbon nitride nanosheets are obtained, which are denoted as g-C 3 N 4 Ns.

[0059] The second step is to wash the graphite carbon nitride nanosheets with water to make the pH neutral; to dry the graphite carbon nitride nanosheets; : 50±0.2mg is added to ethanol, ultrasonically treated, and the resulting product is dried to obtain copper phthalocyanine-conjugated graphite carbon nitride nanocomposites, denoted as g-C 3 N 4 Ns / CuPTc.

[0060] Wherein, in the first step, the specific cond...

Embodiment 2

[0068] This example is to prepare copper phthalocyanine conjugated graphite carbon nitride nanocomposite modified electrode.

[0069] The basic preparation process of this embodiment includes:

[0070] The first step is to clean the ITO electrode and dry it in an inert gas. Among them, the length and width of the indium tin oxide electrode are 4±0.2cm×0.5±0.1cm; water and ethanol are used for cleaning in sequence; the inert gas is nitrogen.

[0071] The second step is to suspend the copper phthalocyanine-conjugated graphitic carbon nitride nanocomposite material in Example 1 in ethanol, and perform ultrasonic treatment. Among them, the ratio of copper phthalocyanine conjugated graphite carbon nitride nanocomposite to ethanol is 1±0.2mg: 5±1mL; the ultrasonic treatment is carried out at room temperature, and the room temperature refers to 26°C±5°C; the ultrasonic treatment time is at least 30min .

[0072] The third step is to apply the suspension obtained in the second step...

Embodiment 3

[0076] This embodiment prepares copper phthalocyanine conjugated graphite carbon nitride nanocomposite material according to embodiment 1, namely g-C 3 N 4 Ns / CuPTc, followed by multiple assays. The following is the preparation of g-C according to the specific conditions illustrated in Example 1 3 N 4 Ns / CuPTc, and the results of various tests.

[0077] figure 2 Scanning electron microscope (SEM), transmission electron microscope (TEM) images and energy dispersive spectroscopy (EDX) images of each material. g-C 3 N 4 The scanning electron microscope image shows a sheet-like structure, and the g-C obtained by sonication 3 N 4 Ns showed a nanosheet structure and the edge surface was changed due to acid treatment, and the SEM image of copper phthalocyanine showed a uniform distribution of sheet-like crystal particles with porous morphology. from g-C 3 N 4 The diagram of the Ns / CuPTc nanocomposite can be seen in the g-C 3 N 4 Copper phthalocyanine nanocrystals were s...

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Abstract

The invention relates to a copper phthalocyanine conjugated graphite carbon nitride nano composite material, a modified electrode and a preparation method. The preparation process comprises the following steps: carrying out heating reaction on melamine to obtain a graphite carbon nitride solid, and carrying out ultrasonic treatment in concentrated sulfuric acid to obtain graphite carbon nitride nanosheets; carrying out ultrasonic treatment on copper phthalocyanine and the graphite carbon nitride nanosheets in ethanol to prepare a copper phthalocyanine conjugated graphite carbon nitride nano composite material; preparing the copper phthalocyanine conjugated graphite carbon nitride nano composite material into a suspension in ethanol, and then coating of an indium tin oxide electrode withthe suspension is carried out to prepare the copper phthalocyanine conjugated graphite carbon nitride nano composite material modified electrode. According to the invention, the copper phthalocyanineconjugated graphite carbon nitride nano composite material can be prepared by mainly utilizing an ultrasonic method, and shows relatively strong electrocatalytic activity; the corresponding modified electrode has high sensitivity and high selectivity, and can simultaneously determine ascorbic acid, caffeic acid, gallic acid and other antioxidants.

Description

technical field [0001] The invention relates to a copper phthalocyanine conjugated graphite carbon nitride nanocomposite material. The nanocomposite material modifies an electrode and a corresponding preparation method, belonging to the technical fields of new materials, electrochemistry and food detection. Background technique [0002] To the applicant's knowledge, due to the nutritional value of antioxidants, a series of analytical methods have been developed to perform critical assessments, including liquid chromatography-mass spectrometry, gas chromatography-mass spectrometry, electrophoretic and electrochemical techniques . Among them, electrochemical technology has the advantages of fast signal response, high sensitivity, good selectivity, low cost, and easy operation, which provides a convenient method for the analysis of antioxidants. Notably, the electrochemical method allows multi-sample analysis and measurement of colored samples that may interfere with spectrosc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B21/082C01B32/21G01N27/30G01N27/327
CPCC01B21/0605C01P2002/72C01P2002/80C01P2002/82C01P2002/84C01P2004/03C01P2004/04C01P2006/40C01B32/21G01N27/308G01N27/3278
Inventor 陈进朱萍姜慧君周刘柱利玛林汗·马里卡丹
Owner NANJING MEDICAL UNIV
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