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A kind of noble metal porous nano film and preparation method thereof

A noble metal and nano-membrane technology, applied in the field of nano-materials, can solve the problems of cumbersome process and long time consumption, achieve high electrochemical catalytic activity, reduce surface energy, and avoid easy agglomeration

Inactive Publication Date: 2019-08-27
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although there are many methods for synthesizing thin-film materials and porous materials, most of them are cumbersome, time-consuming, or involve organic solvents.

Method used

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  • A kind of noble metal porous nano film and preparation method thereof
  • A kind of noble metal porous nano film and preparation method thereof
  • A kind of noble metal porous nano film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The present embodiment provides a kind of preparation of palladium porous nano-membrane, and its specific operation steps are as follows:

[0033] 1) Add 100 μL Na 2 PdCl 4 Solution (10mM) and 1.1mg cetylpyridinium chloride are placed in a beaker, and 10mL deionized water is added to obtain a precursor solution;

[0034] 2) Heat the precursor solution obtained in step 1) to boiling, add 100 μL of ascorbic acid solution (0.1M) when bubbles are generated in the precursor solution, and continue heating until the nanoparticles gather on the water-air interface to form an obvious film;

[0035] 3) suck out the film obtained in step 2) with a dropper, wash and dry to obtain a palladium porous nano-membrane.

[0036] Such as figure 1 Shown is the photo of the palladium porous nano-membrane prepared in this embodiment, and it can be clearly observed that a thin film appears on the water-air interface. Such as figure 2 Shown is the scanning electron microscope photo of the...

Embodiment 2

[0040] This embodiment provides the preparation of a platinum porous nano-membrane, and its preparation method is similar to that of Example 1, except that 100 μL of Na 2 PdCl 4 Solution (10mM) was replaced with 100μL H 2 PtCl 6 ·6H 2 0 solution (10 mM).

[0041] Figure 4 Scanning electron micrograph of the porous nano-membrane prepared in this example. It can be seen from the scanning electron microscope pictures that the obtained product is a porous film material assembled by nanoparticles. The structure of the prepared platinum porous nano-membrane is similar to that of the product in Example 1. It is a layer of membrane structure assembled from many particles, and a clear porous structure can be seen.

Embodiment 3

[0043]The present embodiment provides the preparation of a kind of platinum-palladium bimetallic porous nano-membrane, and its preparation method is similar to embodiment 1, and difference is that step 1) adds Na 2 PdCl 4 After solution, add 100 μL HO 2 PtCl 6 ·6H 2 0 solution (10 mM).

[0044] Figure 5 Scanning electron micrograph of the porous nano-membrane prepared in this example. It can be seen from the scanning electron microscope pictures that the obtained product is a porous film material assembled by nanoparticles.

[0045] Image 6 , 7 and 8 are respectively the X-ray diffraction patterns of the noble metal porous membrane material obtained in Examples 1, 2 and 3. Compared with palladium and platinum standard PDF cards, it can be confirmed that the synthesized thin film material is palladium, platinum and platinum-palladium bimetallic respectively. and Image 6 , compared to 7, Figure 8 The XRD peaks of the platinum-palladium porous membrane shift slightly...

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Abstract

The invention relates to a precious metal porous nanofilm and a preparation method thereof. The precious metal porous nanofilm is assembled by precious metal nanoparticles with a particle size of 5-20nm, pores with a pore size of 1-10nm exist among the precious metal nanoparticles, and the precious metal porous nanofilm has thickness of 0.2-1 micrometer. The preparation method includes: 1) dissolving a precious metal precursor and a surfactant in water to obtain a precursor solution; 2) heating the precursor solution to boiling, adding a reducing agent when bubbles are generated in the precursor solution, and performing heating continuously until nanoparticles gather into a layer of obvious film on a water-air interface; and 3) separating the film so as to obtain the precious metal porous nanofilm. The precious metal porous nanofilm obtained by the method provided by the invention has good catalytic activity and stability.

Description

technical field [0001] The invention relates to the technical field of nanometer materials, in particular to a noble metal porous nanometer membrane and a preparation method thereof. Background technique [0002] Precious metal materials have unique thermal, electrical, magnetic and optical properties, which make them have broad application prospects in the fields of energy, chemical industry, catalysis, and biosensing. However, due to the limited resources and high cost of precious metals, it is very important to reduce the amount of precious metals in practical applications. Theoretical and experimental results suggest that the properties of noble metal materials are highly dependent on their structure. In the specific catalytic process, the high efficiency and selectivity of noble metal materials can be optimized by controlling the structure of the noble metal, so that the noble metal catalyst can obtain an ideal structure, which can greatly improve the catalytic perform...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/44B01J23/42B01J35/10C07C209/36C07C211/46C23C18/44
CPCC23C18/1648C23C18/44C07C209/325B01J23/42B01J23/44B01J35/643B01J35/647C07C211/46
Inventor 阳晓宇肖宇轩应杰魏浩范思宇
Owner WUHAN UNIV OF TECH
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