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Method for preparing nano metal and bimetal hollow ball

A nano-metal and bi-metal technology, applied in the nano field, can solve the problems of high cost, high energy consumption, long preparation cycle, etc., and achieve the effect of saving materials and low energy consumption

Inactive Publication Date: 2005-05-18
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The first type of method usually involves a complicated preparation process, followed by high-temperature heating or chemical corrosion to remove the core template, which has a long preparation cycle, high cost, and high energy consumption, and the process of removing the core template often leads to hollow spherical structures. , which limits its large-scale production and application to a certain extent; the second type of method needs to involve two immiscible liquid phases, which will also cause great inconvenience to its subsequent application

Method used

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  • Method for preparing nano metal and bimetal hollow ball
  • Method for preparing nano metal and bimetal hollow ball
  • Method for preparing nano metal and bimetal hollow ball

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Embodiment 1: At first, the sodium borohydride of 0.01513 grams is added in the 0.4mM citric acid solution of 100 milliliters under the protection of nitrogen, at this moment, there will be bubble (hydrogen) to generate in the solution. Then add the 0.4M cobalt chloride solution of 100 microliters, while adding the cobalt chloride solution, the solution becomes black at once, namely cobalt chloride is reduced by sodium borohydride to generate cobalt nanoparticles, and the obtained 100 ml The cobalt particle solution was rapidly mixed with the 1 mM chloroplatinic acid solution (solution B), that is, the reaction solution A was quickly poured into the solution B under stirring and mixed.

[0036] (1)

[0037] According to the stoichiometric ratio shown in Equation 1 above, the complete reaction of the reaction solution A and the chloroplatinic acid solution B is controlled. Cobalt particles and chloroplatinic acid will undergo a rapid displac...

Embodiment 2-4

[0039]By the same procedure in Example 1, according to the stoichiometric relationship, reaction solution A is mixed with solution B (auric chloride solution, palladium chloride solution and rhodium chloride solution) respectively, and nanoscale gold, palladium and rhodium can be obtained hollow ball.

Embodiment 5-7

[0041] According to the same procedure in Example 1, the mixed solution (solution B) of solution A and bimetallic (platinum, platinum-palladium and gold-palladium) salts can be mixed to make nano-scale bimetallic (platinum, platinum-palladium and gold-palladium) hollow ball.

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Abstract

The present invention relates to nano technology, and is the preparation process of nano hollow metal and bimetal ball. Nano cobalt particle used as the sacrificial template and metal salt solution produce replacement reaction to synthesize nano level hollow metal balls in large scale. The simple preparation process may be completed in room temperature simply and economically and may have huge industrial application foreground. Altering the reaction conditions can prepare nano level hollow metal balls of different sizes. The prepared nano level hollow metal ball has great specific surface area, low density, saving in material and low cost, and may find its wide application in catalyst and other fields.

Description

technical field [0001] The invention relates to the field of nanotechnology, and relates to a method for preparing nano-metal and bimetallic hollow spheres, in particular to the preparation technology of noble metals such as platinum, rhodium, gold and palladium and bimetallic nano-scale hollow spheres with catalytic activity. Background technique [0002] With the rapid development of social modernization, the ensuing energy crisis and environmental pollution have been paid more and more attention. Materials scientists, chemists and catalysis scientists are committed to the research of new, efficient and clean hydrogen energy and fuel cells. However, platinum and gold, which play an important catalytic role in the preparation of hydrogen energy, fuel cells, petrochemical industry, automotive catalytic converters, and automotive exhaust purification, have limited their wide application due to their scarcity and high price. At the same time, palladium and rhodium are also co...

Claims

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Application Information

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IPC IPC(8): B01J37/00B22F9/16
Inventor 梁汉璞万立骏白春礼
Owner INST OF CHEM CHINESE ACAD OF SCI
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