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Zirconium dioxide nano thin film containing platinum nano particles, preparation method and use thereof

A zirconium dioxide and nano-film technology, applied in zirconia and other directions, can solve problems such as inability to do anything, and achieve the effect of preventing loss and good thermal stability

Inactive Publication Date: 2008-06-04
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Although through the unremitting efforts of researchers, the efficiency, cycle stability, precious metal component content and economic cost of these catalytic materials have been improved to varying degrees, but traditional design, preparation methods and technologies are further improving these catalytic materials. The performance of catalytic materials is difficult to achieve

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  • Zirconium dioxide nano thin film containing platinum nano particles, preparation method and use thereof
  • Zirconium dioxide nano thin film containing platinum nano particles, preparation method and use thereof
  • Zirconium dioxide nano thin film containing platinum nano particles, preparation method and use thereof

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Embodiment 1

[0038] From the radius of the platinum atom (1.39 Angstrom, 1 Angstrom = 10 -10 m) to calculate the number of surface atoms (N S ) and the total number of atoms (N T ), and further calculate the ratio of the surface platinum atoms of the platinum nanoparticles to the total platinum atoms. The calculation results are shown in Table 1:

[0039] Table 1

[0040] Diameter of Platinum Nanoparticles (nm)

[0041] In two-dimensional coordinates, the relationship between the ratio of the number of surface atoms of platinum nanoparticles to the total number of atoms and the particle size of platinum nanoparticles is as follows: figure 1 As shown, as the particle size of platinum nanoparticles decreases, the ratio of the number of surface atoms to the total number of atoms increases sharply.

Embodiment 2

[0043] Dissolve 0.0114 g of diethoxymagnesium in 10 mL of 2-ethoxyethanol (2-ethoxyethanol) at room temperature, and stir magnetically to prepare a 10 mM diethoxymagnesium solution in 2-ethoxyethanol. 0.4385 grams of tetrabutoxyzirconium was added to 10mM diethoxymagnesium in 2-ethoxyethanol solution, and magnetically stirred to obtain 2-ethoxy weak. After soaking the quartz substrate in concentrated sulfuric acid with a mass concentration of 96% for a period of time, wash it 3 times with 18.2 megohm ultrapure water for 1 minute each time, dry it with nitrogen, and immerse the quartz substrate in 1wt% sulfuric acid Potassium hydroxide ethanol-water (v / v=3 / 2) solution for 5 minutes, washed with 18.2 megohm ultrapure water three times, each time for 1 minute, and then dried with nitrogen. Immerse the cleaned quartz substrate in 10mL ethoxyethanol solution containing 100mM tetrabutoxyzirconium and 10mM diethoxymagnesium for 3 minutes, take it out, wash it twice with toluene for ...

Embodiment 3

[0045] The zirconium dioxide nano-ultra-thin film containing platinum nanoparticles prepared by embodiment 2 is observed on the ESCALAB 250X-ray photoelectron spectrometer (VG) of the U.S. ThermoElectron Co, and the X-ray used is Al Kα (1486.6eV). The energy is 15kV and 20mA. The pressure in the analysis chamber is 10 -8 Pa. Smoothing, background removal and spectral peak fitting were performed using the VG analysis software package ECLIPS. All spectral peaks are corrected with C1s (285eV) as the standard. The X-ray photoelectron energy spectrum of the zirconia nano ultrathin film containing platinum nanoparticles is as follows: image 3 shown.

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Abstract

The invention pertains to the technical field of nanometer material preparation and in particular relates to a zirconium dioxide nanometer film with platinum nanocluster and a preparation method and applications thereof. The invention adopts zirconium tetrabutoxide and magnesium ethylate as reaction materials and the nanometer film is formed by a layer by layer formation through a surface sol-gel reaction; the zirconium dioxide film with platinum ion is obtained through acid and alkali treatments and ion exchange. The zirconium dioxide nanometer film with platinum nanometer grain is obtained through a treatment by low temperature hydrogen plasma to the zirconium dioxide film. The size and size distribution of the nanometer grain and the thickness of the film can be designed and controlled by the method of the invention and the product can be used for coating a plane and a curved surface; the low temperature plasma adopted prevents loss of platinum component and damage to the film; the obtained zirconium dioxide nanometer film with platinum nanometer grain is of nanometer crystal film and the platinum nanometer grain shows good thermal stability at high temperature. The technology of the invention can be used for preparing resource-saving high effective coating of vehicle exhaust gas catalytic converter and indoor coating which can catalytically degrade contamination.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation, and in particular relates to a zirconia nanofilm containing platinum nanoclusters, a preparation method and application thereof. Background technique [0002] At present, the global ecological environment crisis is becoming more and more serious, and the air pollution and its impact caused by nitrogen oxides are particularly serious. At present, nitrogen oxides mainly come from motor vehicle exhaust, and other pollutants in motor vehicle exhaust also include hydrocarbons and carbon monoxide. With the modernization and urbanization of human life, the use of motor vehicles is becoming more and more popular, and the emission of exhaust gas is increasing. Therefore, the catalytic reaction to eliminate motor vehicle exhaust pollution has become a hotspot of extensive research. Three-way catalyst (TWC) is the best method widely used in the world to control motor vehicle exhaust, whic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G25/02C04B35/628
Inventor 贺军辉国武丰喜武藤惠美
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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