Preparation method and application of hollow Prussian-blue nanometer cube

A nano-cube, Prussian blue technology, applied in the field of electrochemistry, can solve the problems of easy agglomeration, difficult to form hollow three-dimensional nanostructures, and reduced catalytic performance, and achieve the effect of improving specific surface area, low cost, and good catalytic performance.

Inactive Publication Date: 2016-08-10
NORTHWEST UNIV(CN)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, Prussian blue nanomaterials are easy to agglomerate and difficult to form hollow three-dimensional nanostructures during the preparation process, resulting in a decrease in catalytic performance. Therefore, it is necessary to find a simple, stable and efficient preparation method for hollow Prussian blue nanomaterials

Method used

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  • Preparation method and application of hollow Prussian-blue nanometer cube
  • Preparation method and application of hollow Prussian-blue nanometer cube
  • Preparation method and application of hollow Prussian-blue nanometer cube

Examples

Experimental program
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Effect test

Embodiment 1

[0038] First, 3.0 g of polyvinylpyrrolidone was weighed and dispersed in 40 mL of dilute hydrochloric acid (0.01 M) aqueous solution by ultrasonic. Then 0.11 g of potassium ferricyanide was weighed and added to the above solution with stirring. After 30 min, the solution was placed on an electric furnace and heated at 80° C. for 20 h. After being aged, the solution was centrifuged, washed and dried to obtain solid Prussian blue nanocubes with a particle size of 100-150 nm for the next preparation.

[0039] First, 20 mg of solid Prussian blue nanocubes and 200 mg of polyvinylpyrrolidone were ultrasonically dispersed in 20 mL of 1.0 M hydrochloric acid solution, then the solution was transferred to a hydrothermal reactor and sealed, reacted at 140 ° C for 4 h, and after natural cooling, the The solution in the reaction kettle is centrifugally washed and dried to obtain a hollow Prussian blue nanocube material with a particle size of 80-130 nm.

[0040] The schematic diagram of ...

Embodiment 2

[0043] First, 2.0 g of polyvinylpyrrolidone was weighed and dispersed in 40 mL of dilute hydrochloric acid (0.01 M) aqueous solution by ultrasonic. Then 0.165 g of potassium ferricyanide was weighed and added to the above solution with stirring. After 30 min, the solution was placed on an electric furnace and heated at 80° C. for 20 h, placed for ageing, centrifuged, washed and dried to obtain solid Prussian blue nanocubes for the next preparation.

[0044] First, 20 mg of solid Prussian blue nanocubes and 100 mg of polyvinylpyrrolidone were ultrasonically dispersed in 20 mL of 1.0 M hydrochloric acid solution, then the solution was transferred to a hydrothermal reactor and sealed, reacted at 150 ° C for 4 h, and after natural cooling, the The solution in the reaction kettle is centrifuged, washed and dried to obtain hollow Prussian blue nanocubes.

[0045] Different composition materials are prepared by adjusting polyvinylpyrrolidone, temperature and reaction time according ...

Embodiment 3

[0047] In the specific measurement, the glassy carbon electrode modified by the hollow Prussian blue nanocube material prepared in Example 1 was used as the working electrode, the saturated calomel electrode was used as the reference electrode, and the platinum electrode was used as the auxiliary electrode. The electrolyte was a 0.02M PBS (pH 6.5) solution containing 0.1M potassium chloride.

[0048] According to the preparation method of Example 1, solid Prussian blue nanocubes and hollow Prussian blue nanocubes were prepared respectively, and 5 μg of solid Prussian blue nanocubes and hollow Prussian blue nanocubes were coated on glassy carbon electrodes, respectively, and the modified electrodes were detected. Electrocatalytic performance of hydrogen peroxide.

[0049] like Figure 5 As shown in the cyclic voltammogram of Figure 5 Compared with the solid Prussian blue nanocube material, the response current of the hollow Prussian blue nanocube material is 1 times larger, ...

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Abstract

The invention discloses a preparation method and application of a hollow Prussian-blue nanometer cube. The preparation method for the hollow Prussian-blue nanometer cube comprises the following steps: step 1, heating polyvinylpyrrolidone hydrochloric acid solution containing potassium ferricyanide and preparing a Prussian-blue nanometer cube of a solid structure by using a slow chemical aging method; and step 2, dispersing the Prussian-blue nanometer cube prepared in the step 1 and polyvinylpyrrolidone in a hydrochloric acid solution at the same time, carrying out a hydrothermal reaction and then carrying out centrifugation, washing and drying so as to obtain the hollow Prussian-blue nanometer cube. According to the invention, the uniform cubic morphology of the prepared Prussian-blue nanometer material is guaranteed by using the slow chemical aging method and controllable acid etching under hydro-thermal conditions is carried out, so Prussian-blue forms a unique hollow cubic morphology; and thus, catalytic activity of the material is improved. The prepared hollow Prussian-blue nanometer cube shows excellent electrochemical catalysis response in application to a hydrogen peroxide sensor.

Description

technical field [0001] The invention belongs to the technical field of electrochemistry, and in particular relates to a preparation method and application of a hollow Prussian blue nano-cube. Background technique [0002] In recent years, various nanostructured inorganic metals and organic quinhydroquinone organic small molecules have been widely used in the preparation of hydrogen peroxide sensors due to their excellent catalytic properties. , good stability and other characteristics, has been widely used in the configuration and application of hydrogen peroxide electrochemical sensors. Among these catalysts, Prussian blue-like materials, also known as "artificial peroxidases", have attracted widespread attention due to their unique stability, electrochromic effect, and strong electrocatalytic activity. In particular, Prussian blue modified electrodes have good catalytic activity and detect hydrogen peroxide at a low potential of about 0.1V, which avoids the interference o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01C3/12B82Y30/00B82Y40/00
CPCC01C3/12C01P2002/72C01P2004/04C01P2004/38C01P2004/62C01P2004/64
Inventor 盛庆林张丹沈宇郑建斌
Owner NORTHWEST UNIV(CN)
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