Preparation method of platinum-diamond nanocomposite electrode

A nano-composite and diamond technology, which is applied in the fields of electrochemical variables of materials, material analysis by electromagnetic means, measuring devices, etc., can solve the problems of ineffective dispersion, poor water dispersibility of nano-diamond powder, and difficulty in preparing nano-diamond electrodes, etc. achieve good catalytic performance

Inactive Publication Date: 2017-06-23
NINGXIA MEDICAL UNIV
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  • Description
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  • Application Information

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Problems solved by technology

[0010] However, the current problems encountered in the preparation process of diamond electrodes are: the water dispersibility of nano-diamond powder is very poor, and it cannot be effectively dispersed in water or other organic solvents, so that further functional modification of nano-diamonds cannot be carried out. It is not easy to directly prepare nano-diamond electrodes

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  • Preparation method of platinum-diamond nanocomposite electrode
  • Preparation method of platinum-diamond nanocomposite electrode

Examples

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Embodiment 1

[0041] A preparation method of a platinum-diamond nanocomposite electrode, the steps are as follows:

[0042] (1) Preparation of diamond nanoparticles:

[0043] Put 0.5g of diamond powder in an agate mortar, grind for 4h to obtain diamond nanoparticles, and set aside;

[0044] (2) Preparation of cationic surfactant functionalized diamond nanocomposites:

[0045] Take by weighing 55 mg of diamond nanoparticles prepared in step (1), disperse with 55 mL of secondary deionized water, then magnetically stir for 1.25 h, then add 30 μL of cationic surfactant, ultrasonically disperse, continue magnetic stirring for 4 h, and then centrifuge to separate The diamond nanoparticles modified by functionalization were removed, and then were centrifuged and washed with 50mL of secondary deionized water and 50mL of absolute ethanol respectively. This operation was repeated 3 times to remove surfactants not involved in functional modification, and finally vacuum-dried at 62.5°C 13h, obtain th...

Embodiment 2

[0059] A preparation method of a platinum-diamond nanocomposite electrode, the steps are as follows:

[0060] (1) Preparation of diamond nanoparticles:

[0061] Put 0.05g of diamond powder in an agate mortar, grind for 0.5h to obtain diamond nanoparticles, and set aside;

[0062] (2) Preparation of cationic surfactant functionalized diamond nanocomposites:

[0063] Take by weighing 40 mg of diamond nanoparticles prepared in step (1), disperse with 40 mL of secondary deionized water, then magnetically stir for 0.5 h, then add 10 μL of cationic surfactant, ultrasonically disperse, continue magnetic stirring for 3 h, and then centrifuge to separate The diamond nanoparticles modified by functionalization were removed, and then were centrifuged and washed with 40mL secondary deionized water and 40mL absolute ethanol respectively. This operation was repeated twice to remove surfactants not involved in functional modification, and finally vacuum-dried at 60°C 12h, obtain the diamon...

Embodiment 3

[0077] A preparation method of a platinum-diamond nanocomposite electrode, the steps are as follows:

[0078] (1) Preparation of diamond nanoparticles:

[0079] Put 1 g of diamond powder in an agate mortar, grind for 8 hours to obtain diamond nanoparticles, and set aside;

[0080] (2) Preparation of cationic surfactant functionalized diamond nanocomposites:

[0081] Weigh 70 mg of diamond nanoparticles prepared in step (1), disperse with 70 mL of secondary deionized water, then magnetically stir for 2 h, then add 50 μL of cationic surfactant, ultrasonically disperse, continue magnetic stirring for 5 h, and then centrifuge to separate The functionalized modified diamond nanoparticles were removed, and then centrifuged and washed with 60 mL of secondary deionized water and 60 mL of absolute ethanol respectively. This operation was repeated 3 times to remove surfactants that did not participate in the functionalized modification, and finally vacuum-dried at 65 ° C for 14 h , to...

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Abstract

The invention relates to a preparation method of a platinum-diamond nanocomposite electrode, and is characterized by solving the problem on dispersity of diamond nano-particles in the form of in-situ modification. Further functionalized modification is performed on the diamond nano-particles to obtain a composite material with excellent catalytic performances and advantages of a diamond electrode, to further prepare a modified electrode. According to the preparation method of the platinum-diamond nanocomposite electrode disclosed by the invention, not only preparation means of the diamond nano-particles are expanded, but also the problem on the dispersity of the diamond nano-particles is solved in the form of in-situ modification; and wide application of nano-diamond in catalization, electrochemical sensing and like fields is greatly promoted.

Description

technical field [0001] The invention relates to the field of preparation of conductive diamond electrodes, in particular to a method for preparing a platinum-diamond nanocomposite electrode. Background technique [0002] Common traditional electrode materials generally include metal electrodes, pyrolytic graphite and glassy carbon electrodes, etc. For graphite materials, it has good conductivity and low cost, but because the structure of graphite is planar and layered, the Van der Waals force between layers Relatively weak, under electro-oxidation conditions, separation between layers will occur, causing the surface to fall off, thereby affecting its electrochemical performance. As a graphite allotrope, diamond materials generally have a cubic crystal structure, and the carbon atoms are connected by covalent bonds, making diamond famous for its high hardness, high thermal stability and chemical stability. [0003] In recent years, diamond has aroused widespread interest amo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/30
CPCG01N27/308
Inventor 郑志祥柳娟娟王玫
Owner NINGXIA MEDICAL UNIV
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