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Preparation method of ultrafine platinum nano-wire

A platinum nanowire and chloroplatinic acid technology, applied in the field of nanomaterials, can solve the problems of complex process, hindering the application of ultra-fine platinum nanowires, low aspect ratio of platinum nanowires, etc., achieving simple process, simple production control method, Ease of mass production

Inactive Publication Date: 2012-09-12
YANSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the preparation method is complex and the aspect ratio of the synthesized platinum nanowires is not high, which hinders the application of ultrafine platinum nanowires to a certain extent.

Method used

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  • Preparation method of ultrafine platinum nano-wire
  • Preparation method of ultrafine platinum nano-wire
  • Preparation method of ultrafine platinum nano-wire

Examples

Experimental program
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Effect test

Embodiment 1

[0022] Take 1mg of bovine insulin powder, dissolve it in 0.87mL of 25mM hydrochloric acid solution, and prepare a 0.2mM insulin hydrochloric acid solution, put the solution into a container, vortex and mix well, let it stand at room temperature until the bubbles dissipate, and seal it with a parafilm , the solution was heated in a constant temperature metal bath at 70°C for about 5 hours to form an insulin fiber suspension.

[0023] Take 40 μL of 5 mM chloroplatinic acid solution (pH = 1.6) and add it to 200 μL of the above insulin fiber suspension, mix well, and incubate at 4°C for 10 h on a shaker at 50 r / min. Then 60 μL of sodium borohydride reducing agent solution with a concentration of 10 mM was added dropwise, and then shaken at 4° C. and 50 r / min for 8 h to complete the reaction, and ultrafine platinum nanowires were obtained.

[0024] Such as figure 1 As shown, the obtained single ultrafine platinum nanowire has a diameter of 2.5 nm and a length of 1.8 μm.

Embodiment 2

[0026] Take 1 mg of bovine insulin powder, dissolve it in 0.17 mL of 18 mM hydrochloric acid solution, and prepare 1 mM insulin hydrochloric acid solution, put the solution into a container, vortex and mix it, and let it stand at room temperature until the bubbles dissipate, then seal it with a parafilm. The solution was heated in a constant temperature metal bath at 67°C for about 12 hours to form an insulin fiber suspension.

[0027] Take 100 μL of 3.5 mM chloroplatinic acid solution (pH=1.8) and add it to 150 μL of the above insulin fiber suspension, mix well, and incubate at 6°C, 80 r / min on a shaker for 15 h. Then 90 μL of sodium borohydride reducing agent solution with a concentration of 7.5 mM was added dropwise, and then shaken at 6° C. and 80 r / min for 20 h to complete the reaction, and ultrafine platinum nanowires were obtained.

Embodiment 3

[0029] Take 1mg of bovine insulin powder, dissolve it in 0.087mL of newly prepared 10mM hydrochloric acid solution, and prepare a 2mM insulin hydrochloric acid solution, put the solution into a container, vortex and mix it, let it stand at room temperature until the bubbles dissipate, and seal it with a parafilm , the solution was heated in a constant temperature metal bath at 65°C for about 20h to form an insulin fiber suspension.

[0030] Take 130 μL of 2.5 mM chloroplatinic acid solution (pH=2) and add it to 100 μL of the above insulin fiber suspension, mix well, and incubate at 10°C and 100 r / min on a shaking table for 20 h. Then 120 μL of sodium borohydride reducing agent solution with a concentration of 5 mM was added dropwise, and then shaken at 10° C. and 100 r / min for 24 hours to complete the reaction, and ultrafine platinum nanowires were obtained.

[0031] Such as figure 2 As shown, the yield of the prepared ultra-fine platinum nanowires is significantly increased...

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Abstract

The invention relates to a preparation method of an ultrafine platinum nano-wire. The method mainly comprises that an insulin fiber suspension is obtained by dissolving bovine insulin powders into a hydrochloric acid solution with the concentration of 10-25 mM to prepare an insulin hydrochloric acid solution, blending the insulin hydrochloric acid solution with vortexes, and heating the blended insulin hydrochloric acid solution for 5-20 h in a constant-temperature metal bath at the temperature of 65-70 DEG C; and that the ultrafine platinum nano-wire is obtained by adding a chloroplatinic acid solution into the above insulin fiber suspension, fully blending the mixture, incubating the mixture for 10-20 h in a shaking table at the temperature of 4-10 DEG C and with the rotating speed of 50-100 r / min, dropwise adding a sodium borohydride reductant solution with a concentration of 5-10 mM into the mixture, and vibrating the mixture for 8-24 h in a shaking table at the temperature of 4-10 DEG C and with the rotating speed of 50-100 r / min to make the mixture fully reacted. The method of the invention has the advantages of a simple process, mild reaction conditions, and good repeatability, and is environment protective and highly efficient. With the method, appearance of the platinum nano-wire has no obvious changes while output of the nano-wire increases substantially. Thus, the nano-wire is provided with higher aspect ratio and simpler regulation and control method of output, thereby being easier to realize large-scale production.

Description

Technical field [0001] The present invention is a nanomaterial field, which specializes in a preparation method of ultra -fine platinum nanowine. Background technique [0002] The precious metal platinum nano -crystal has a wide range of application prospects in the fields of sensor, catalysts, and electrode materials due to efficient selection of catalytic activity and good conductivity, as well as significant anti -corruption capabilities. [0003] The physical and chemical characteristics and selectivity of platinum nanocrystalline are strongly dependent on the shape and size of the particles. It is expected to significantly improve the physical and chemical characteristics of platinum nano crystals, especially electrocatalytic activity.As precious metals are expensive and prices are still rising, the cost -effectiveness of the catalyst catalyst at the greatest extent has become the focus of scientific research and the focus of industrial competition. [0004] At present, most...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24B82Y40/00
Inventor 高发明张龙改李娜侯莉徐子明赵玉峰
Owner YANSHAN UNIV
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