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Hollow porous spherical platinum-silver alloy nano-material and preparation method for same

A technology of platinum-silver alloy and nanomaterials, applied in the field of hollow porous spherical platinum-silver alloy nanomaterials and its preparation, to achieve the effects of controllable porous structure, convenient operation and uniform size

Inactive Publication Date: 2012-07-11
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Retrieval shows that hollow porous spherical platinum-silver alloy nanomaterials can be prepared by one-step synthesis of platinum-silver alloy nanoparticles and corrosion method.

Method used

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  • Hollow porous spherical platinum-silver alloy nano-material and preparation method for same
  • Hollow porous spherical platinum-silver alloy nano-material and preparation method for same
  • Hollow porous spherical platinum-silver alloy nano-material and preparation method for same

Examples

Experimental program
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Effect test

Embodiment 1

[0041] Prepare a mixed solution of ethylene glycol, polyvinylpyrrolidone, potassium bromide and copper chloride: weigh 1 gram of polyvinylpyrrolidone and add it to 50 ml of ethylene glycol, stir or ultrasonically dissolve, then add 5 mg of potassium bromide and 5 mg of Copper chloride, stirred or ultrasonically dissolved evenly for later use. Then weigh 1 gram of silver nitrate and add it to the above mixed solution and stir or shake to dissolve. Then get 02 grams of chloroplatinic acid and add to the above mixed solution and mix well. Finally, the mixed solution was transferred to a reaction kettle, and then placed in an oven at 160° C. for 240 minutes. Naturally cool to room temperature after stopping heating. After the reaction stopped, the mixture was centrifuged with 400 ml of ethanol and 400 ml of water respectively to obtain platinum-silver alloy nanoparticles. Get 1 gram of platinum-silver alloy nanoparticles and redisperse them in an aqueous solution of polyvinylpy...

Embodiment 2

[0042] Example 2: The process is similar to Example 1, but after nitric acid corrosion and centrifugal cleaning, the heating temperature of the product is increased to 200° C. and the heating time is extended to 200 minutes after the product is redispersed in water. Stop heating and cool to room temperature, wash with water and centrifuge to obtain hollow porous spherical platinum-silver alloy nanomaterials with obvious surface pore structure. Figure 4 is a transmission electron microscope image of a hollow porous spherical platinum-silver alloy nanomaterial with a diameter of 50 nanometers, by Figure 4 It can be seen that the surface pore structure is obvious and continuous. Figure 5 This is a high-resolution transmission electron microscope image of this platinum-silver alloy nanomaterial, from which it can be seen that there is a continuous pore wall structure, and the diameter of the pores is between 2 and 10 nanometers. The hollow porous spherical platinum-silver allo...

Embodiment 3

[0043] Embodiment 3: Similar to the process of Embodiment 1, but in the preparation process, ethylene glycol is replaced by glycerol, and all the other conditions remain unchanged. A hollow porous spherical platinum-silver alloy nanomaterial with a diameter of 60 nanometers can be obtained. Image 6 It is a transmission electron microscope image of a hollow porous spherical platinum-silver alloy nanomaterial with a diameter of 60 nanometers.

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Abstract

The invention relates to a hollow porous spherical platinum-silver alloy nano-material and a preparation method for the same. The nano-material is of a spherical structure with a porous shell and an internal cavity, the diameter of the spherical structure ranges from 5 nanometers to 500 nanometers, the inner diameter of the cavity ranges from 1 nanometer to 400 nanometers, the thickness of a porewall ranges from 1 nanometer to 50 nanometers, and the pore diameter ranges from 1 nanometer to 20 nanometers. Polyatomic alcohol, inorganic silver salt precursor, inorganic platinum salt precursor and polyvinylpyrrolidone are used as reaction raw materials, inorganic salt containing halogen ions and copper-containing inorganic salt are used as auxiliaries, and the hollow porous spherical platinum-silver alloy nano-material is synthesized by means of reaction. The preparation method is simple in process, convenient in operation, fine in repeatability and low in cost, and the obtained hollow porous spherical platinum-silver alloy nano-material can be used for the fields of chemical and electrochemical catalysis, chemical sensors, biomolecular sensors, information storage, fuel cells, solarcells and the like. Particularly, the hollow porous structure of the nano-material can be effectively applied to slow drug release and target-oriented drug delivery treatment.

Description

technical field [0001] The invention relates to a hollow porous spherical platinum-silver alloy nanomaterial and a preparation method thereof, in particular to a nanomaterial that can be used in chemical and electrochemical catalysis, chemical sensors, biomolecular sensors, optical information storage, solar cells, drug sustained release, target Porous spherical platinum-silver alloy nanomaterial with adjustable thickness and size of spherical shell and controllable pore size for drug delivery and treatment, and a preparation method thereof. Background technique [0002] Due to its unique properties, the precious metal platinum is widely used in many fields such as industrial catalysis, energy, and environmental governance. Especially in the field of new energy, due to the extensive development and application of fuel cell technology, platinum, as the main and most important catalyst, has received great attention. Since metal platinum is a scarce resource and the proven res...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24B22F1/00
Inventor 丁轶谷小虎王慧
Owner SHANDONG UNIV
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